| Call | QTH | Area | | Method/Soapbox |
| AA0CL | MO | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,437.90
0.52 | 7,055,632.30
-1.62 | | | WA6ZTY | | | 14,121,530.90
-39.93 |
| Method: K3 and SpectrumLab software
Soapbox: I tried the method in QST. Might have just done better to spot with the K3, though. This really helped me understand my radio a lot better. Thanks. Better ideas for the next time. |
| AA6LK | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.23
-0.15 | 7,055,633.68
-0.24 | | | WA6ZTY | | | 14,121,570.61
-0.22 |
| Method: HP Z3805A 10MHz GPSDO, Marconi 2019 HF synth, HP 3325A LF synth, HP 54601A o'scope, FT-847 in AM/narrow mode, 5BTV and 80M/40M dipole antennas, Vista laptop running SpecLab, DigiPan for spotting, EZGPIB controlling Prologix USB-GPIB to set up and interrogate instruments, GPSCon for monitoring Z3805A; the 2019 was set to inject a reference beat signal to produce a ~400Hz beat tone, and the 3325A was tuned for minimum phase slip between it and the beat tone. Each run was recorded to a .wav file through SpecLab, and at a later time replayed to export data to spreadsheet to refine submission numbers.
Soapbox: Good copy on all stations, but the multipath spreading was about the worst I've seen in past years. Thanks Connie and Mike for running the test. 73, L |
| AB1UY | NH | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,428.92
-8.46 | 7,055,626.86
-7.06 | | | WA6ZTY | | | 14,121,567.30
-3.53 |
| Method: Elecraft KX3 into Spectrum Lab.Used LibreOffice Calc to perform
calculations. |
| AB2UW | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,437.23
-0.15 | 7,055,633.44
-0.48 | | | WA6ZTY | | | 14,121,570.69
-0.14 |
| Method: 98' long W5GI dipole oriented E-W connected to Icom IC-7000; SignaLink interface to laptop running Spectrum Lab. After key down period, switched radio input to HP 3335A frequency synthesizer output (through 100 dB of attenuation). Thunderbolt GPSDO 10 MHz reference signal was fed into external ref. input of 3335A. Tuned synthesizer to match appearance of key-down signal on Spectrum Lab waterfall.
Soapbox: Easily readable signals on 20m, 40m & 80m. Level at the antenna input in each case was about -100 dBm. Some QSB on 40m & 80m. |
| AB4RS | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.27
-0.11 | 7,055,633.59
-0.33 | | | WA6ZTY | | | 14,121,570.71
-0.12 |
| Method: HP 3586B, locked to 10 MHz reference from Trimble Thunderbolt. 15625 Hz IF was sampled, recorded, and post-processed using Spectrum Lab.
Soapbox: All three stations had good, strong signals into Northern Virginia. The atmosphere conspired to smear the signal over a good portion of the spectrum. We'll see if I picked the right thread out of the waterfall. Another interesting artifact was on all three signals I observed a second signal mixing with the test frequency, with a sideband component 75 Hz above and below the test signal, about 10-15 dB lower than the test signal. This occurred beginning about 90 seconds into the key-down signal. |
| AC2DE | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.66
0.28 | 7,055,634.51
0.59 | | | WA6ZTY | | | 14,121,571.96
1.13 |
| Method: Equipment:
o Spectrum Lab for measuring audio frequencies.
o Icom IC-706 mkII in USB mode, modified to accept external reference.
o HP 8640B Signal Generator feeding 30 MHz reference frequency to IC-706.
o Yaesu FT-101ZD receiving WWV on 10 MHz AM, used to calibrate computer sound card.
Test Setup:
o Feed audio out from IC-706 to sound card L channel.
o Feed audio out from FT-101ZD to sound card R channel.
o Tune IC-706 to appx. 400 Hz below target frequency.
Methodology
o Attempted to calibrate against WWV on 10 MHz. Stumped by Doppler shift.
o Use AM audio from FT-101ZD to verify sound card sampling rate with WWV 500 Hz tones.
o Ran the FMT the best I could. Tuned IC-706 to bring target frequencies to 400 +/- 50 Hz.
o Ran Spectrum Lab with FFT input size of 524288 and decimated input by 48.
o After FMT, re-ran calibration runs against WWV 2.5 and 5 MHz. (10 MHz was too noisy.)
Math:
o Sound Card Cal Factor = Target Tone Freq / Measured Tone Freq
o WWV Measurement = VFO + ((Target Tone Freq / Measured Tone Freq) * WWV Measured Audio Freq)
o VFO Cal Factor = WWV Nominal Freq / WWV Measurement
o FMT Result Frequency = (VFO * VFO Cal Factor) + (FMT Measured Audio Freq * Sound Card Cal Factor)
Soapbox: This was my first FMT, and I'll admit that I got a bit obsessive. I have no idea if any of my efforts to eliminate error even worked, or if they were counterproductive. What I do know is that I will definitely be better prepared in November! |
| AC2EU | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,440.00
2.62 | 7,055,635.00
1.08 | | | WA6ZTY | | | 14,121,572.00
1.17 |
| Method: Yaesu FT450, HRD CAT , DM780 waterfall using a BFO lock tone of 700 Hz |
| AC5P | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,440.00
2.62 | 7,055,637.00
3.08 | | | WA6ZTY | | | 14,121,576.00
5.17 |
| Method: Elecraft K3 with no aux. equipment/ auto spot on sidetone.
Guesstimated error after checking CHU and WWV freq. readout error. |
| AD3Y | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,438.04
0.66 | 7,055,632.56
-1.36 | | | WA6ZTY | | | 14,121,569.99
-0.84 |
| Method: Kenwood TS-2000 Tranceiver
Spectrum Lab V2.81 b17 software
SignalLink USB interface
Soapbox: First time in FMT. |
| AD8Y | OH | W8 | | | 80m | 40m | 20m | | K5CM | | 7,055,640.00
6.08 | | | WA6ZTY | | | 14,121,565.00
-5.83 |
| Method: Kenwood TS-450s eyeballed against WWV, which
Apple iPad running music tuner app.
Soapbox: I've been wanting to try this since I first read about it in 1970. Just now getting around to it...next year with fancier equipment. I'm joined here by XYL Laura N8NFE. Let's see how many large systematic errors we made...only entering station with a 10 KHz error, hmm... |
| AF9A | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,437.34
-0.04 | 7,055,633.56
-0.36 | | | WA6ZTY | | | 14,121,570.55
-0.28 |
| Method: HPSDR Mercury phase display. Freq reference 10MHz OCXO cal to WWV, CHU.
Soapbox: Good signals 20-30 dB above the noise with QSB. |
| AG2M | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,436.90
-0.48 | 7,055,633.50
-0.42 | | | WA6ZTY | | | 14,121,570.39
-0.44 |
| Method: FT-950 using Dell Inspiron running Spectrum Lab.
WWV and CHU used as reference signals.
Soapbox: Signal reception adequate with QRN 3+ due to static crashes.
Thanks to K5CM and WA6ZTW for contribution to Radio Amateur Hobby and keeping FMT activity runing like a Swiss Watch.
CU
73, George AG2M |
| AG6TW | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,862.26
424.88 | 7,055,635.76
1.84 | | | WA6ZTY | | | |
| Method: GPSDO 10MHz Ref into K3 with SignaLink USB into Spectrum Lab
Soapbox: Never heard a thing on 20 M :( |
| AK6C | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,515.00
77.62 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,570.00
-0.83 |
| Method: Icom 756 Pro, HP3325A, HP5335A, Rb frequency standard. HP3325A provides RF beat frequency against FMT unknown frequency. HP5335A measures frequency of audio beat note. Add or subtract audio beat note as required to obtain unknown frequency.
Soapbox: Excellent reception on 20M/40M. Good signal strength on 80M, offset by atmospheric noise and adjacent QRM that started upon FMT commencement. Thanks and 73 to K5CM and WA6ZTY for providing the FMT test transmissions! |
| K1GGI | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,437.30
-0.08 | 7,055,633.30
-0.62 | | | WA6ZTY | | | 14,121,570.70
-0.13 |
| Method: Heterodyne with hfo referenced to gps, measure beat with spectrumlab. |
| K1IG | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,435.68
-1.70 | 7,055,632.97
-0.95 | | | WA6ZTY | | | 14,121,567.94
-2.89 |
| Method: Used VE3GSO method from April 2015 QST.
Receiver: Elecraft K3
Software: SpectrumLab and fldigi
Computer: 15 year old desktop
Soapbox: In 53 years as a ham, this was my first FMT - I never thought I had the equipment to do it. Kudos to VE3GSO for a great article!
The 80 meter signal was very weak in MA; the other two signals were both S9. |
| K2LYV | FL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.02
-0.36 | 7,055,633.81
-0.11 | | | WA6ZTY | | | 14,121,571.19
0.36 |
| Method: K1JT WSPR programs. Yaesu FT450D with 20ft vertical.
Soapbox: Signals were best here in Tampa on 40M. On 20 signals were about s5 with S3 noise. On 40 signal was s9+ noise s7. On 80M I could barely hear the signal but the software got a SNR of about 15 dB. Fast CPUs and FFTs can do awesome things. |
| K3JQ | MD | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,437.25
-0.13 | 7,055,632.93
-0.99 | | | WA6ZTY | | | 14,121,570.71
-0.12 |
| Method: Equipment: HP 3586B Selective Level Meter, Trimble Thunderbolt GPS Disciplined Oscillator, Carolina Windom Short 80, Windows 7 PC with Soundblaster Sound Card, Spectrum Lab spectrum analysis software.
Method: compare Spectrum Lab measured FMT frequency with nearby WWV frequency. Following example illustrates the procedure:
Before beginning of 20 meter transmission, set 3586B to 15 MHz, 20 Hz bandwidth, and note Spectrum Lab measure peak audio frequency. If there were no errors, it would read 1850 Hz. The difference from 1850 Hz represents all the errors, including sound card error, 3586B BFO error, and doppler shift error. Repeat for WWV at 10 MHz. Repeat after the FMT transmission. Take the average of a number of readings. For this test, the average value was 1849.524 Hz.
Then set the 3586B to 14121 kHz, 3.1 kHz bandwidth, and wait for FMT transmission. Determine Spectrum Lab measured audio frequency -- in this case it was approximately 2421 Hz. So now we know that the transmitted frequency is about 14121000+2421-1850 = 14121571 Hz.
Set the 3586B to 14121571 Hz, 20 Hz bandwidth, and make a high resolution frequency measurement with Spectrum Lab. Again, take average of a number of readings. In this case the result was 1849.238 Hz.
So the 20 m FMT frequency is then estimated to be 14121571+1849.238-1849.524 = 14121570.71 Hz.
Soapbox: The method described above corrects for the most significant errors except for Doppler shift. Doppler shift varies considerably with path and conditions. The hope is that comparing with WWV close in time and at not too far removed frequencies can give some estimate of the error. |
| K3KO | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.13
-0.25 | 7,055,633.74
-0.18 | | | WA6ZTY | | | 14,121,570.82
-0.01 |
| Method: TS-480/HP8657B(Rb locked),HP5335A,SpectrumLab,EZGPIB
Difference from reference oscillator method.
Soapbox: Thank you to WA6ZTY and K5CM for this FMT.
20/40M S9+20, 80M S9. However QRN at times well above these levels.
Thunderstorm static crashes drove RX nuts at times (ping pong sized hail and 58 mph winds reported not far from here). Not expecting decent results. |
| K4BYN | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.87
-0.51 | 7,055,633.03
-0.89 | | | WA6ZTY | | | 14,121,571.37
0.54 |
| |
| K4KJQ | KY | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.17
-0.21 | 7,055,633.49
-0.43 | | | WA6ZTY | | | 14,121,570.32
-0.51 |
| Method: Homebrew receiver 2ea PTS 160 synthesizers the first for local oscillator and second to clock sound adapter.
Soapbox: We had thunder storms and lots of QRN. Noticed a lot of Doppler shift and broadening as well. Also, seemed to be some odd QRM on 80 meters as well. Signal strong but lightning crashes stronger, hi hi
At least did not get a direct hit while monitoring signals.
73
Bill wa4lav |
| K4TRH | TN | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.03
-0.35 | 7,055,633.09
-0.83 | | | WA6ZTY | | | 14,121,570.80
-0.03 |
| Method: Radio: TS-590S (no TCXO).
Computer: Lenovo Y550 laptop, w/standard sound card.
OS: Linux Mint 171
Software: FLDIGI 3.21.80. LIBRE Office Calc 4.2.7.2.
1. Used the WWV mode of FLDIGI to trim the sound card sample rate.
2. Used the Frequency Analysis mode of FLDIGI to determine and record the TS-590S frequency error at 7 different WWV and CHU frequencies between 2.5 and 20 MHz. Performed one calibration just before the FMT and one just after.
3. Wrapped the TS-590S in a layer of bubble wrap to minimize the effects of local temperature variations the rig is exposed to (no TCXO). I had noticed some perturbations in frequency during calibrations, although they were small, in the tenths of Hz range. Let the TS-590S soak for a couple of hours and the temperature on the top got up to around 90 Deg F and the bottom was warmer, around 100 Deg F. This appeared to improve the stability of the calibration measurements, although I did not compare the data, before and after. It's like the whole radio is sort of a crude oven, using it's own power consumption to warm up. For the uninitiated, DO NOT TRY THIS WHILE TRANSMITTING, or you might fry something.
4. Used FLDIGI Frequency Analysis mode during the FMT to measure the frequency an each of the 3 bands.
5. Post FMT, entered the calibration data, and the measured data into a spreadsheet, and performing an interpolation to calculate the error at the measured frequency. Applied the error at the measured frequency to the measured frequency, for the final result.
Soapbox: This is my first FMT, mainly because I never thought I had the equipment necessary to even come close. But recently I discovered the frequency analysis mode of FLDIGI, and decided to give it a go. Regardless of how I did, it was a technical challenge a lot of fun, so thanks to the ARRL for an enjoyable activity.
I can't help but think back to my early days in amateur radio when most receivers had a frequency dial that might have 5 kHz graduations on it, and you could not trust those. I had a NC-173 and a Knight R-100 in those days. Since you used your receiver to "spot" your transmitter frequency, you were wise to stay well within the band edges to avoid an OO notice, or worse, an FCC ticket. If you were fortunate your receiver had a built-in 100 kHz crystal calibrator. This device would generate harmonics every 100 kHz all the way up to 10M and beyond, so you could hear the calibrator at band edges and between, a nice feature. However, that option might be a $10 option to the purchase price of a receiver, and not everyone had one.
Yep, I am an old-timer.
73,
Jack
K4TRH |
| K5CM | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.38
0.00 | 7,055,633.92
0.00 | | | WA6ZTY | | | 14,121,570.83
0.00 |
| Method: TX Antennas:160m vertical (almost). 80 meter dipole slopping down from a 80' tower. 40 meter dipole between two 80' towers, 4 element SteppIR. For RX I use an FT-1000D in AM mode with a PTS-250 for low side injection. Audio is feed to SpectrumLab. Other RX antennas include three 500' Beverage
Soapbox: For transmitting the FMT I use an HP-Z3801 GPS frequency source which clocks a HP-3336b or a PTS-250. This feeds a 10 db transistor amp which drives a 12by7 / pair of 6146. The final amp runs about 400 watts. There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the GPS frequency source. I verify the accuracy of the TX system with a total separate RX system 73, Connie, K5CM |
| K5RKS | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.06
-0.32 | 7,055,633.64
-0.28 | | | WA6ZTY | | | 14,121,570.71
-0.12 |
| Method: Injected signal into receiver from GPS disciplined HP3336B along with signal received off the air. Used homebrew software to implement FFT and waterfall display to calculate difference in audio tones from receiver. Took a number of separate 8sec readings during the FMT. Then averaged them together to get final reported frequency.
Soapbox: WA6ZTY signal was very stable with minimal Doppler S9+20dB. All 10 of my 8 second WA6ZTY frequency measurements were within 0.12Hz of each other. K5CM's 40m signal was S7 with a range of 2Hz of variation across 15 separate 8sec readings. K5CM's 80m signal was S9 with about 1Hz of variation across 17 separate 8sec readings.
Pretty good FMT but Doppler seemed more pronounced than usual on K5CM's signal. I was located in the Southern End of a tornado watch area so maybe the unstable weather fronts [and hence unstable ionosphere layers ??] contributed to the Doppler.
Thanks to WA6ZTY and K5CM for running this FMT. |
| K6APW/7 | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,437.56
0.18 | 7,055,633.18
-0.74 | | | WA6ZTY | | | 14,121,571.36
0.53 |
| Method: TenTec receiver, audio hybrid combiner, digital audio generator, zero beat by ear to calibrate against WWV and measure transmissions.
Soapbox: Surprisingly WA6ZTY was steady S4 at 600 kilometer distance off backside of beam. Good S7 signals with QSB from K5CM on both bands.
Thanks for a fine job by transmit stations. |
| K6IQL | KS | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,436.84
-0.54 | 7,055,632.95
-0.97 | | | WA6ZTY | | | 14,121,570.88
0.05 |
| Method: Audio beat method.Dual Diversity with 75A4 and Drake R8B receivers in AM mode. RF reference from home brew DDS clocked with Rb Frequency Standard. Data points accepted/rejected on basis of frequency separation between the two receiver channels. Only data with small difference (<< 100 mHz) between channels averaged to determine beat frequency. Generally less that 20 pairs used. SL used to measure tone freq and output text files for subsequent processing using Excel.
Soapbox: This FMT was great good fun. Thanks to the transmitting stations. A great job as usual despite odd happenings. During the first half of Connie's 80 M run, the operators chair collapsed (from all the tension?) but hopefully I recovered. The longer call up is a great idea for times when QRM or propagation is adverse. Great signals from all stations this time though. Well done and 73 - john k6iql spring hill KS. |
| K6LU | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.33
-0.05 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,570.79
-0.04 |
| Method: Kenwood TS-2000. Horizontal dipole antennas, Spectrum Lab fft program, with ref/correction factors determined from WWV, CHU per QST April 2015 article,"Measuring Frequencies at VE3GSO".
Soapbox: Good signals. First time at this exercise and really enjoyed using the simple and free tools available to get amazing accuracy. Learned a lot about my TS-2000 freq accuracy. It was off the set value a max of 11 hz on 20 meters Thanks for running this. |
| K6OQK | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.39
0.01 | 7,055,633.64
-0.28 | | | WA6ZTY | | | 14,121,570.60
-0.23 |
| Method: I use an HP-3586B receiver and a HP-3336A Signal Generator, both referenced to GPS. The 15.625 kHz I.F. of the HP-3586B is fed to one side of an oscilloscope and the other side of the oscilloscope is fed by the HP-3336A. The HP-3336A is adjusted to produce as stationary a 1:1 Lissajou pattern on the scope as propagation will allow. For details of my method see: http://www.k5cm.com/k6oqk%20fmt%20new.htm
Soapbox: Conditions were not very stable at my location, but I was able to copy and measure on all frequencies. What better way is there to learn how propagation affects our signals than through the participation in FMT's. Thanks to Connie and Mike for their hard work in making the FMT possible. _Burt, K6OQK |
| K7HIL | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,437.40
0.02 | 7,055,633.98
0.06 | | | WA6ZTY | | | 14,121,570.88
0.05 |
| Method: Antennas: 40 and 20 - Yagi on main Rx, Vertical sub Rx, 80M Inv Vee and Mag Loop. Only diff was Mag loop must less freq deviation than Inv Vee.
Rx mode was CW to take advantage of narrow filters. Audio from Rx via TOSlink to ZXR sound card. Rx ref TBolt
Soapbox: All signals heard well, on 40 both short and long path. Doppler was really large - almost a Hertz on 80M. Other issue here was heavy QSB; from S1 to S9+10 on Connie 40M. |
| K7KMQ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.38
0.00 | 7,055,633.91
-0.01 | | | WA6ZTY | | | 14,121,570.68
-0.15 |
| Method: FT-101EE receiver hetrodyned with HP 3325A function generator, beat note measured on android tablet running audio spectrum analyzer software by www.keuwl.com
Soapbox: Second FMT, decent signals on all bands. |
| K9KK | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.12
-0.26 | 7,055,633.18
-0.75 | | | WA6ZTY | | | 14,121,570.70
-0.13 |
| Method: GPS reference signal for Spectrum Lab.
Soapbox: Very Strong signals from both WA6ZTY and K5CM in central, Oklahoma.. Had fun---Thank You !! Anxiously awaiting next FMT. |
| K9RJ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,439.42
2.04 | 7,055,633.13
-0.79 | | | WA6ZTY | | | 14,122,074.58
503.75 |
| Method: Elecraft K3 and Spectrum Lab
Soapbox: This is my first attempt so I don't expect to be highly accurate. The 20 meter signal was just above my noise level. 40 meters was a little louder but signal seemed to be moving around a bit. 80 meters was most difficult with an RTTY QSO seemingly right on top of the test signal. I look forward to learning more about how to do this. Thanks to VE3GSO for his QST article. |
| KA9SVR | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,434.92
-2.46 | 7,055,633.63
-0.29 | | | WA6ZTY | | | 14,121,568.73
-2.10 |
| Method: Icom IC-735 and Spectrum Lab per QST article.
Soapbox: First time trying the FMT. |
| KB2MN | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,436.60
-0.78 | 7,055,633.30
-0.62 | | | WA6ZTY | | | 14,121,569.80
-1.03 |
| Method: Temperature compensated Elecraft KX-3 and spectrum lab software as described in April 2015 QST. Graphed approximate frequency error for KX-3 at 3.330 and 7.850 MHZ (CHU) and 10.0, 15.0. 20.0 Mhz (WWV) On test day could not copy WWV at 2.5 or 5.0 MHz. Antenna 3 el yagi for 20 meters and G5RV @ 25 feet for 40 and 75 meters. My first try at FMT.
Soapbox: First FMT try. Used a temperature compensated Elecraft KX-3 and Spectrum Lab software. Good signals on 20 and 40 meters but some splatter from SSB signal just above 3.6 MHz at lower end of 75 Meter band. |
| KB4ZVM | SC | W4 | | | 80m | 40m | 20m | | K5CM | | | | | WA6ZTY | | | 14,121,571.01
0.18 |
| Method: I used K1JT's WSPR/FMT software on a Pentium 4 computer via a SignaLink USB external sound card, and CI-V control via an RS-232 serial connection. The rig was an Icom 706 (original) with a random wire antenna (about 90 feet) and an SGC-230 autotuner. I turned the equipment on about 24 hours before the test to allow it to stabilize thermally.
Soapbox: WA6ZTY's transmission on 20 meters was 599 on call up, but was somewhat affected by QSB during key down. Neither my software, nor my ears, were able to detect any transmission from K5CM on 40 meters or 80 meters. 40 meters was very quiet, but 80 meters had a lot of QRN. Once again, I enjoyed this very much, and plan to participate again in the future! Many thanks to K5CM and WA6ZTY for their efforts! |
| KB8W | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,437.50
0.12 | 7,055,634.70
0.78 | | | WA6ZTY | | | 14,121,570.06
-0.77 |
| Method: IC-729 and Spectrum Lab software, calibrated by CHU and WWV.
Soapbox: This is my first time entering the FMT. I have considered trying before, but never had any equipment beyond a frequency counter of dubious accuracy. The Spectrum Lab software makes this possible with just a computer, a transceiver with digital readout, and WWV/CHU as a calibration method. We shall see if I did it correctly! Thanks for the signals and the precision measurement of them. |
| KC1ANM | CT | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,444.00
6.62 | 7,055,639.00
5.08 | | | WA6ZTY | | | 14,121,573.00
2.17 |
| Method: AVALA01 SDR calibrated to WWV at 10.0 MHz, Genesis Radio software v. 1.1 (based on PowerSDR software.)
Soapbox: This was my first time doing the FMT. The 40m frequency seemed to drop about 4 Hz near the end, while the 20m and 80m frequencies seemed steady. Some QSB on 40m, a bit more on 80m. Thanks, and see you again in November! 73, Al KC1ANM |
| KC2LNC | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.04
-0.34 | 7,055,633.81
-0.11 | | | WA6ZTY | | | 14,121,572.52
1.69 |
| Method: Yeasu FT-990 on quarter wave vertical./ I tried to follow the April QST article as close as possible. Through the method described I derived tuning errors of 17 Hz on 20M, 8.9 Hz on 40M and 4.6 Hz on 80M. Assuming I got this right it should be pretty close.
Soapbox: First time participating in a FMT. I enjoyed the challenge and look forward to finding out how close I came and if my method is valid. |
| KC2SYK | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,437.41
0.03 | 7,055,632.83
-1.09 | | | WA6ZTY | | | 14,121,566.08
-4.75 |
| Method: WWV/CHU calibration, fldigi.
Soapbox: Due to an error on my part, I didn't get a good measurement on 20m. |
| KC5DAT | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,439.87
2.49 | 7,055,633.16
-0.76 | | | WA6ZTY | | | 14,121,568.72
-2.11 |
| Method: ICOM 746PRO with the cotton ball LO stabilization mod. Warmed up for 2 hrs. Spectrum Lab to measure exact carrier position.
Used CHU and WWV to characterize receiver frequency error.
Entered all data into a spreadsheet to compute the frequency.
Soapbox: I new about the test for years, alas I read in the April QST issue and decided to give it a spin.
Thanks for providing this challenge.
73 de KC5DAT |
| KC9DOA | WI | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,437.10
-0.28 | 7,055,633.40
-0.52 | | | WA6ZTY | | | 14,121,570.50
-0.33 |
| Method: Kenwood TS-2000 with offset checked against WWV using FLDigi frequency analysis modem and frequency measured with FLDigi and correction offset applied.
Soapbox: This is my first attempt at the FMT. I read the article in QST and since I had recently used FLDigi to adjust the reference oscillator in the TS-2000 I decided to give it a try. The signals were good on all three bands here in EN53ss. |
| KD2BD | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,436.97
-0.41 | 7,055,633.18
-0.74 | | | WA6ZTY | | | 14,121,570.67
-0.16 |
| Method: All homebrew equipment including a quadrature phasing direct conversion receiver, WWVB referenced frequency standard, frequency counter, and an end fed 43 foot long wire antenna. Method involved phase locking the receiver's LO to the frequency of the unknown carrier minus a 1 kHz offset, measuring the frequency of the receiver's LO over several 10 second integration periods, and taking a "selective average" of the readings after factoring in the 1 kHz offset. 20-meter readings were made using an SA612 to mix the incoming signal with the frequency standard's 10 MHz LO, and then measuring the 4 MHz IF as described above. Further details are available at: http://www.qsl.net/kd2bd/fmt-methodology.html
Soapbox: This was my first attempt at measuring a carrier on 20 meters, so I was extremely pleased (and relieved) to hear WA6ZTY's strong signal emerge from an almost noiseless background at the start of the FMT.
Connie's signals were even stronger, but rapid fading accompanied by frequent phase reversals on all transmissions (possibly due to a weak CME occurring at the time), plus thunderstorm QRN (particularly strong on 80) will certainly have a negative impact on my results.
Thanks to Mike, Connie, and the ARRL for conducting and sponsoring this event.
73.000 de John, KD2BD |
| KD5HIP | AR | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,433.00
-4.38 | 7,055,626.00
-7.92 | | | WA6ZTY | | | 14,121,557.00
-13.83 |
| Method: ICOM 756 PRO, Rig Expert standard and MixW 3.1.1 running on PC.
Soapbox: I think that I would like to see results with six character grid square of receiver location (and of course the transmitters grid square). |
| KD5MMM | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.50
0.12 | 7,055,634.10
0.18 | | | WA6ZTY | | | 14,121,569.30
-1.53 |
| Method: FT-847, speclab
Soapbox: 20m results were odd, may be way off! |
| KG0HY | NE | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,437.60
0.22 | 7,055,632.70
-1.22 | | | WA6ZTY | | | 14,121,570.50
-0.33 |
| Method: Power up, WinRadio G313, at 0030Z, and started monitoring 14.670MHz CHU. Used Yagi for 20M, and 100 feet dipole, for 40M and 80M.
Soapbox: WA6ZTY, signal was -64db. K5CM signal on 40M was -82db, with high local electric noise. The signal on 80M was -73db, with noise. Casey KG0HY |
| KG4AIP | FL | W4 | | | 80m | 40m | 20m | | K5CM | | 7,055,361.66
-272.26 | | | WA6ZTY | | | 14,121,285.44
-285.39 |
| Method: Yaesu FTDX1200 feeding Spectrum Lab running on a 64-bit Windows-based pc. Cushcraft R-8 antenna 46' a.g.l., 197' a.m.s.l., MFJ-989D tuner. |
| KG6HSQ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.37
-0.01 | 7,055,634.27
0.35 | | | WA6ZTY | | | 14,121,570.62
-0.21 |
| Method: HP 3586C, Spectrum Lab
Soapbox: 20M weak here. |
| KG8FE | OH | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,458.00
20.62 | 7,055,555.00
-78.92 | | | WA6ZTY | | | 14,121,500.00
-70.83 |
| Method: Kenwood TS-2000X and used CW beat note method.
Soapbox: My first time attempting the FMT and I had fun. Electrical noise from the lightning and thunder storms that came through the area. |
| KI5EE | LA | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.40
0.02 | 7,055,633.35
-0.57 | | | WA6ZTY | | | 14,121,571.14
0.31 |
| Method: Kenwood TS-2000 and Dell computer with sound card using Spectrum Lab program.
Soapbox: I was happy that all three frequencies were good and strong at my QTH. This FMT has been a great learning process for me. The artical in QST was a major help to me. |
| KJ8S | OH | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,437.17
-0.21 | 7,055,633.28
-0.64 | | | WA6ZTY | | | 14,121,570.48
-0.35 |
| Method: Flex-6500 with OCF 40M dipole at 25ft. Used WSJT WSPR/FMT software with calibration against WWV 2.5/5/10/15/20Mhz 30 minutes prior to FMT.
Soapbox: QRN on 80M & 40M as a thunderstorm just cleared the area 30 minutes before. Lots of fun, can't wait for the results. Thanks! |
| KK4KAZ | FL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.35
-1.03 | 7,055,632.89
-1.03 | | | WA6ZTY | | | 14,121,571.01
0.18 |
| Soapbox: Band | Sig Lvl | Nois Lvl
20M | S9+10 | S2
40M | S9+10 | S9
80M | S9 | S5 |
| KK6JTL | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.00
-0.38 | 7,055,633.00
-0.92 | | | WA6ZTY | | | 14,121,570.00
-0.83 |
| Method: ICOM IC-718 and a Sangean ATS-505 SW Receiver. 80ft Wire dipole at 10ft AGL.
Soapbox: Worked on my math a bit more since last year. |
| KK6KFQ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,438.00
0.62 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,587.00
16.17 |
| Method: Flex-6300 warmed up and VCO calibrated using KCBS in SF, Pixel Mag Loop antenna, HP 53131A Counter to measure 600Hz CW tone. No recordings done.
Soapbox: Thanks to John KM6QX for helping get me set up and loaning the counter; accuracy of the results are entirely my responsibility, however. The 20M results are probably way off, as I didn't know what I was looking at. |
| KK7UQ | WA | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,435.79
-1.59 | 7,055,632.82
-1.10 | | | WA6ZTY | | | 14,121,573.03
2.20 |
| Method: K3, Navigator Interface, Spectrum Lab for measurements, MixW for tuning.
Soapbox: First time FMT, learned a lot about drift vs. time on my K3 - was still changing at 24 hrs warm up. |
| KM6QX | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.67
0.29 | 7,055,633.98
0.06 | | | WA6ZTY | | | 14,121,570.83
-0.00 |
| Method: Pixel Loop antenna into a Flex-1500 locked to a GPSDO. Received in CW mode, fixed AGC, then measured ~600 Hz tone with Spectrum Lab. Selected most probable spectrum peak then corrected for Flex’s DDS VFO offset.
Soapbox: Very low band noise: -116 dBm on 20m and 40m, and -121 dBm on 80m, thanks to loop antenna. WA6ZTY’s signal was S-3 from 100 miles away, and K5CM’s signals were S-5 from 1,550 miles. |
| KN1H | NH | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,436.38
-1.00 | 7,055,632.78
-1.14 | | | WA6ZTY | | | 14,121,570.58
-0.25 |
| Method: IC-7200, Spectrum Lab software. ICOM indicated freq + SL audio - error previously calculated = result.
Soapbox: My first FMT, just read VE3GSO's QST article and got enthused. This is a lot of fun, looking forward to the next one. Signals above S9 on all 3 bands, easy copy. |
| KU4PY | AL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.48
-0.90 | 7,055,633.04
-0.88 | | | WA6ZTY | | | 14,121,570.36
-0.47 |
| Method: ICOM 756 Pro; Vertical; SpecLab.
Soapbox: All freqs. usable and no interference, for a change. |
| LU1CGB | DX | DX | | | 80m | 40m | 20m | | K5CM | | | | | WA6ZTY | | | 14,121,273.43
-297.40 |
| Method: TS-450/4 elements yagi with FLdigi/Argo, calibrated to WWV.
Soapbox: This is my first atempt to the FMT, so well see...73 |
| N0EXM | IA | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,436.96
-0.42 | 7,055,633.70
-0.22 | | | WA6ZTY | | | 14,121,571.14
0.31 |
| Method: Yaesu FT-817ND and W3EDP longwire ant. I calibrated local oscillator errors against WWV and CHU using Spectrum Lab and averaged at about 5 different times over the day. Actual measurements were taken same way with 5-10 data points taken at each test frequency over the 2 minute keydown interval. Built an Excel spreadsheet with curve fit for calibration errors and other math. |
| N1UBZ | CA | W6 | | | 80m | 40m | 20m | | K5CM | | | | | WA6ZTY | | | 14,121,570.90
0.07 |
| Method: Ettus Research N210 software-defined radio with LFRX daughterboard, Mini-Circuits 30MHz LPF, long wire antenna, synchronized to a homebrew GPSDO using an HP 10811 10MHz reference. Signal was collected at 200ksps. Rough offset was digitally mixed out at the sample rate, then signal was decimated to 200sps and an FFT applied to the full two-minute carrier. The maximum bin was used as the frequency center despite 2Hz observed Doppler spreading.
An alternative method used a software PLL to lock onto the decimated signal. The frequency output of the PLL was heavily filtered to produce a center frequency estimate.
The two results produced estimates which differed by 0.04Hz, so I called it a day.
Soapbox: Observed >2Hz of Doppler spread on the single-hop path, but a good strong signal for a reasonably good center estimate. |
| N3CRT | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,437.49
0.11 | 7,055,633.45
-0.47 | | | WA6ZTY | | | 14,121,570.39
-0.44 |
| Method: Flex 3000/FLDIGI frequency analysis. Took measurements vs WWV and CHU to estimate how far off frequency the radio is in Hz per MHz. Average all the errors per measuring session (3 evening and 1 morning)and then the average of all those averages. Correct the FMT signals by the average error I had calculated.
Soapbox: My first FMT. This is probably not the best way to do this with the equipment I have. I don't understand how doppler comes into play or how I could remove it from the equation to get closer to the actual frequency, but I'll be learning about what I can do for next time. Thank you for the opportunity to learn and try to make a guess. |
| N3FG | PA | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,437.29
-0.09 | 7,055,633.17
-0.75 | | | WA6ZTY | | | 14,121,570.29
-0.54 |
| Method: K3, Spectran, WWV
Soapbox: Pretty good signals, but lots of Doppler on WWV. Thanks again for a great event. |
| N3IZN | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.32
-0.06 | 7,055,634.21
0.29 | | | WA6ZTY | | | 14,121,570.37
-0.46 |
| Method: Kenwood TS-440 with VK3HZ XRef, Thunderbolt GPSDO, Dell T5400 Measure frequency command in WSPR. |
| N4AU | AL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.57
-0.81 | 7,055,633.64
-0.28 | | | WA6ZTY | | | 14,121,570.96
0.13 |
| Method: TS570 Kenwood, Speclab and program I wrote for calculations.
Soapbox: Doppler/multipath, especially on my reference frequencies. I used CHU 7850 for all references since it seemed to have least doppler/multipath here. |
| N5DM | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,438.20
0.82 | 7,055,633.55
-0.37 | | | WA6ZTY | | | 14,121,570.80
-0.03 |
| Method: FT-3000D and Digipan v2.0
Soapbox: All signals S9+ with QSB/QRN on 80mtr. Thanks WA6ZTY & K5CM. |
| N5LUL | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,436.50
-0.88 | 7,055,634.30
0.38 | | | WA6ZTY | | | 14,121,580.90
10.07 |
| Method: Yaesu FT-920 Zero beat station about 1Mhz and WWV at 10Mhz to create linear "fudge-factor" chart. Zero beat WA6ZTY and K5CM sigs and subtracted predicted error created from chart. "PoBoy" method. |
| N6SKM | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,438.00
0.62 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,571.00
0.17 |
| Method: Yaesu FT-857D with a VK3HZ XRef-FT oscillator board slaved to an IsoTemp OCXO adjusted to perfectly match two 70cm WSPR GPSDO-slaved signals, for 1 part in 0.5 billion frequency accuracy. Output went through a SignaLink-USB
into FLDIGI running on a Mac Mini giving 1hz resolution.
Soapbox: WA6ZTY was only about 100 miles away, but I feared that I wouldn't be able to hear K5CM, especially since my only HF antenna is a 10-30mhz magnetic loop! K5CM was so strong that I could still hear him even through what was nearly a dead short on 40 and 80 meters! (I got a better signal just ungrounding the SO239 connector, but nevertheless the loop still received him.)
This was great fun. Thanks for running this test! |
| N7EP | WA | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,436.43
-0.95 | 7,055,634.03
0.11 | | | WA6ZTY | | | 14,121,571.29
0.46 |
| Method: IC-746, Spectrum Lab Software, WWV and CHU, and some luck.
Soapbox: Signals were strong, but the 20 meter signal frequency into Seattle moved almost 1 Hz lower during the 9 minute test. We are very blessed to have the free Spectrum Lab. software. Without it my entries would be wilder guesses. And thanks to the ARRL, K5CM and WA6ZTY for the FMT's. I really enjoy them. |
| N8OB | OH | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,437.07
-0.31 | 7,055,633.75
-0.17 | | | WA6ZTY | | | 14,121,570.22
-0.61 |
| Method: Flex 6300 Spectrum Lab
Soapbox: My first try with the new Flex Radio. Good sigs from both stations. |
| N8SBE | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,438.00
0.62 | 7,055,633.00
-0.92 | | | WA6ZTY | | | 14,121,568.00
-2.83 |
| Method: K3 with AM-S mode, direct readout to nearest hz (compared to 5 MHz and 10 MHz AM-S readout of WWV).
Soapbox: WA6ZTY was 59+20 here on 20M, K5CM 59 on 40M, 57 on 80M Nice sigs. |
| N8XKZ | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,438.60
1.22 | 7,055,633.80
-0.12 | | | WA6ZTY | | | 14,121,568.10
-2.73 |
| Method: Elecraft K3 locked to external 10MHz frequency reference. Audio output fed to Dell laptop sound-card sampling at 48KHz and processed using Spectrum Lab.
Soapbox: My first attempt at the ARRL FMT. Was interested by the April 2015 QST article by Dave McCarter, VE3GSO. Measurements are "best guess" as the FFT peak constantly changing around +/- 1 Hz or so.
Very interesting and educational regarding error sources in radio, computer. |
| N9CIF | IL | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,437.26
-0.12 | 7,055,633.98
0.06 | | | WA6ZTY | | | 14,121,572.42
1.59 |
| Method: Icom IC-7200
Soapbox: Thanks! |
| NR5ON | NM | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.50
0.12 | 7,055,634.20
0.28 | | | WA6ZTY | | | 14,121,571.50
0.67 |
| Method: TAPR Hermes SDR with PowerSDR and Spectrum Lab software, Antenna - wire dipole fan for 20, 40, 80 m at ~25 ft HAAT. Calibrated VFO against WWV & CHU in PowerSDR using built-in XO. Recorded .wav files, extracted center frequencies in Spectrum Lab, subtracted and corrected for 600Hz CWL offset. Double checked against online coarse values direct from PowerSDR cursor readout.
Soapbox: First time trying FMT. Good strong signals - observed +10dB except 80m +5dB with some fading in Santa Fe, NM. Learned new things about PowerSDR and Spectrum Lab that will be useful for future projects. Thanks for the fun! |
| NV5M | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,435.00
-2.38 | 7,055,633.00
-0.92 | | | WA6ZTY | | | 14,121,566.00
-4.83 |
| Method: Elecraft K3 + KTCO3-1 reference oscillator; Elecraft P3; CWDecoderXP audio frequency display for the visual zero-beat assist; DL4YHF's Spectrum Lab Audio Signal Analyzer (not fully utilized!) for sound card and receiver calibration; dipole and vertical antennas.
Soapbox: 1st time trying the FMT. My late start learning the process prevented a thorough calibration of the receiver and sound card. This was a good training for the next FMT. Strong, clear 20, 40, and 80M signals in West Michigan. My thanks to VE3GSO, WA6ZTY, K5CM, and W8IMA. |
| NY2G | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,432.00
-5.38 | 7,055,630.00
-3.92 | | | WA6ZTY | | | 14,120,586.00
-984.83 |
| Method: Kenwood TS450SAT - Spectrum Lab - as per QST April 2015 article.
Soapbox: I have/had NO idea what I was doing! |
| NY7T | WA | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,437.35
-0.03 | 7,055,634.02
0.10 | | | WA6ZTY | | | 14,121,571.20
0.37 |
| Method: Kenwood TS-950SD,GPS 10MHz clock, custom decade divider for 10KHz ref to TS-950 and 1KHz test tone to Signalink USB for calibration, Spectrum Lab software on old Win XP computer, LibreOffice Calc for analysis, and a lot of coffee.
Soapbox: good fun! had to shut off my WINMOR RMS that uses 3597 KHz as one of it's frequencies....would hate to have someone call during the FMT test! |
| SV1XV | DX | DX | | | 80m | 40m | 20m | | K5CM | | 7,055,634.50
0.58 | | | WA6ZTY | | | 14,121,573.00
2.17 |
| Method: Icom IC-706 MkII with GB3RAL beacon monitoring program, calibrated against RWM (4996 & 9996 kHz) and CHU (7850 kHz).
Soapbox: A tough one, due to ionospheric Doppler effects over many hops. Estimated uncertainty 1.5 Hz on 7 MHz, 2.5 Hz on 14 MHz. Not able to calibrate against RWM on 14996, so the result for WA6ZTY is based on an extrapolation of the calibration curve. 73 Costas SV1XV. |
| SV8QG | DX | DX | | | 80m | 40m | 20m | | K5CM | | 7,055,633.88
-0.04 | | | WA6ZTY | | | 14,121,571.10
0.27 |
| Method: Flex 1500 locked to TRIMBLE NTPX26AB GPS Timing Receiver, Spectran for data acquisition, using CHU for Doppler correction.
Soapbox: Strong and clear signal on 20m, I can’t say the same for 40m, nill on 80m. CHU Doppler wild shifted on 14.670 |
| VE2IQ | ON | VE | | | 80m | 40m | 20m | | K5CM | 3,598,437.27
-0.11 | 7,055,633.62
-0.30 | | | WA6ZTY | | | 14,121,570.82
-0.01 |
| Method: Low dipole ant > TS850 > computer. Recorded all xmsns, went to bed, then analyzed next day. Signals all > S9+10dB here. No attempt to adjust for Doppler/multipath (20M was horrible).
Soapbox: Thanks to the transmitting stations and to ARRL. Nice to see some new blood this time - kudos to VE3GSO for the QST article. |
| VE3GSO/ZL2 | DX | DX | | | 80m | 40m | 20m | | K5CM | | | | | WA6ZTY | | | 14,121,566.88
-3.95 |
| Method: Just realized I made an error in calculating the receive offset error for 14.12MHz. It was 9.02Hz, not 4.6Hz. DUH!
Soapbox: It is a pity that the signals are so weak at this time of day, mid afternoon in the Pacific Southwest. As I meet more ZL hams I realize how resourceful and technically capable they are, and I'm sure more of them would take part if they could.
Dave |
| VK2CZ | DX | DX | | | 80m | 40m | 20m | | K5CM | 3,500,000.00
-98,437.38 | 7,000,000.00
-55,633.92 | | | WA6ZTY | | | 14,121,569.48
-1.35 |
| Method: IC7800 operating in LSB on 14.122100 connected to laptop using spectogram 14. Spectogram configured for 16384 FFT analysis of audio band from 520 to 540 Hz. Time average of 22 seconds applied, as S/N of signal short path was average. Laptop audio sample rate corrected by 0.4Hz from WWV on 15.0MHz.
Soapbox: Touch and go if propagation would allow me to hear the 20m feed. The CW signal would be reported at 249 (not 599) My first time effort.Got to within 0.4 Hz of my final measurement in the first 10 seconds of CW. Barring silly math errors, am curious how this panned out over the 7,800 mile path.
No chance of hearing 80m or 40m signals at this time of day from Sydney, Australia.
Regards, David. |
| W0CZ | ND | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,436.61
-0.77 | 7,055,633.78
-0.14 | | | WA6ZTY | | | 14,121,571.87
1.04 |
| Method: I Calibrated the KX3 to 15 MHz WWV. Measured AF with Spectrum Lab Software and did the math to give me an answer
Soapbox: I was going to use my K3 but the KX3 seemed to have better frequency stability so I changed to the KX3. I let the KX3 and the computer with Spectrum Lab Software warm up for 7 hours. |
| W0HBK | IA | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,437.50
0.12 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,571.00
0.17 |
| Method: Direct measurement using YAESU FT-920 with TCXO.
Soapbox: All signals 599+20 in Cedar Rapids. Thanks again for doing the test! |
| W0PHD | MN | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,437.00
-0.38 | 7,055,630.00
-3.92 | | | WA6ZTY | | | 14,121,570.00
-0.83 |
| Method: ic756 pro CSM 1 service monitor phase locked to 10 Meg standard used
to produce a 100Hz tone either above or below the frequency to be
measured.
Soapbox: All signals were strong but multipath was evident. The fact that the frequency counter that determined the generated standard tone and unknown also quit so lost a few decimal places. It has been a few years since I did an FMT and all most forgot how to do it. |
| W1KU | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,436.51
-0.87 | 7,055,633.39
-0.53 | | | WA6ZTY | | | 14,121,570.85
0.02 |
| Method: 550' low horizontal loop. Softrock ensemble RX II. E-MU 0204 USB soundcard sampling @ 48KHz with I/Q inputs processed by Spectrum Lab. 32K FFT length with divisor of 2. Si570 calibrated against 15 MHz WWV, then sampling rate calibrated using 1 KHz tone generated by tuning to 14.999 MHz. Interaction between these two parameters was challenging and not really solved. Raw FMT values used are averages of once-per-second frequency measurements over duration of keydown. Frequency error computed from 1 minute of samples of 600 Hz tone from each of WWV @ 2.5, 5, 10, and 15 MHz. Linear interpolation used to estimate error at FMT frequencies. Estimated errors ranged from -0.78Hz (80m) to 0.50 Hz (20m). 600 Hz chosen because it was near tone frequencies for 20m and 40m tests.
Soapbox: First attempt at FMT. No high-accuracy equipment. Method inspired by VE3GSO article from 4/2015 QST; thanks! I learned a lot and think I have a better calibration plan for next time. |
| W2FD | PA | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,437.30
-0.08 | 7,055,633.30
-0.62 | | | WA6ZTY | | | 14,121,570.80
-0.03 |
| Method: Kenwood TS 450S using CW/CW Reverse modes and measuring the nearly 600 Hz. frequencies to correct the dial reading for frequency. WWV 15 MHz. was used as a calibration measurement for all frequencies of the test..
Soapbox: Good, strong signals for all frequencies but static from thunderstorms was very strong for both the 40 and 89 meter frequencies making precise measurement very difficult. Thanks to Connie and his group of one for another good measurement session. |
| W3DAD | MD | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,436.24
-1.14 | 7,055,631.64
-2.28 | | | WA6ZTY | | | 14,121,570.45
-0.38 |
| Method: Elecraft K3/TCXO. Using Spectrum Lab and WWV/CHU to calibrate receiver and create correction graph. Use LSB and measure beat frequency. Then using frequency dial reading and correction measurements, calculate actual transmitted frequency.
Soapbox: Good signals on all bands with no QRM here in MD. Had lots of noise on 80M but FMT signal had good S/N ratio. Always a challenge and lots of fun. Thanks ARRL, WA6ZTY and K5CM for the opportunity and hope you continue this exercise. |
| W3FAY | MD | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,438.00
0.62 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,573.00
2.17 |
| Method: Elecraft K3 pre-calibrated against WWV and CHU. FMT signals zerobeat to K3 600Hz sidetone spotting frequency. K3 displayed the resulting FMT frequency.
Soapbox: All signals were strong here in MD. |
| W3JW | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.31
-0.07 | 7,055,633.63
-0.29 | | | WA6ZTY | | | 14,121,570.85
0.02 |
| Method: Icom 7800(Locked to GPSDO)into Spectrum Lab
Soapbox: Doppler shift and multipath were moderate this time.Signal strengths were good on all bands (20M-S9(dropout noted), 40M-S9+10 and 80M-S9). Tnx to all who make the FMT possible! |
| W3SA | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.34
-0.04 | 7,055,633.42
-0.50 | | | WA6ZTY | | | 14,121,569.79
-1.04 |
| Method: FTDX-3000 with 80 mgr horiz delta loop and Spectrum Lab running under Windows 7 64 bit.
Soapbox: 20 and 40 meter signals were in the clear and loud 80 meter suffered from high level of atmospheric noise due to storms to the east.
First time using SL for an FMT |
| W4EDX | NC | W4 | | | 80m | 40m | 20m | | K5CM | | 7,055,632.99
-0.93 | | | WA6ZTY | | | 14,121,570.32
-0.51 |
| Method: IC-7700, HP Computer. Spectrum Lab software
Soapbox: Used April 2015 QST page 35-36 method. |
| W4JLE | SC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.19
-0.19 | 7,055,633.72
-0.20 | | | WA6ZTY | | | 14,121,570.36
-0.47 |
| Method: Went old school. Hallicrafters S40B, Conar RF signal Gen, Bell &Howell scope and a homebrew freq counter with GPS time base.
Copied signal, zerobeat with signal gen and scope. Measured the gen freq with the freq counter. Goal was to be within 10 hz.
Soapbox: Good signals from all stations, your efforts are much appreciated! |
| W4RYF | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,597,563.40
-873.98 | 7,054,366.20
-1,267.72 | | | WA6ZTY | | | 14,120,430.00
-1,140.83 |
| Method: EQUIPENT: Icom-7600, 80m Windom Antenna, Signal Link sound card, Dell laptop running MixW in BPSK mode.
METHOD: Warm up/ calibration for three hours prior to start using WWV and CHU frequency and audio tune standards. Calibrated each band in CW mode with BFO tone centered on 800 Hz.
Then during test observe each of the test frequency tones on MixW waterfall, read audio tone frequency from bottom of MixW page, recorded on worksheet every 15 sec, then computed average observed BFO tone for each test frequency. Computed Actual Test Freq. as follows:
Actual Freq. (Hz)= Dial Freq.(Hz) + (observed avg. BFO tone(Hz) - 800Hz)
Soapbox: All test signals were extremely weak and smothered in QRN due heavy weather in neighboring states.
Once again rocket science not required,thanks to my trusty Icom-7600.
--------------
Enjoyed your test.
de W4RYF |
| W5AJ | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,436.74
-0.64 | 7,055,633.60
-0.32 | | | WA6ZTY | | | 14,121,567.40
-3.43 |
| Method: Elecraft K3, Spectrum Lab software & VE3GSO QST article
Soapbox: Nice writeup by VE3GSO |
| W5LAC | MS | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,437.00
-0.38 | 7,055,633.00
-0.92 | | | WA6ZTY | | | 14,121,571.00
0.17 |
| Method: Flexradio3000. Run calibration feature using 10Mhz WWV.
LSB mode, adjust for 440 Hz tone, measured by Roland VT-12 Vocal Trainer near speaker. Subtract 440 Hz from frequency on display.
Soapbox: This is a fun activity , even if I'm way off frequency ! Thanks to K5CM and WA6ZTY and ARRL for making it possible. |
| W5NZ | AL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.33
-1.05 | 7,055,633.19
-0.73 | | | WA6ZTY | | | 14,121,570.06
-0.77 |
| Method: Calibrated 0.05ppm oscillator in FTdx5000 w/ WWV (15MHz) and used fldigi to directly read freq |
| W5TV | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,436.80
-0.58 | 7,055,632.80
-1.12 | | | WA6ZTY | | | 14,121,570.50
-0.33 |
| Method: Flex 6500 with a 10MHz rubidium standard and fldigi in frequency analysis mode
Soapbox: All signal were strong here and this was very enjoyable. |
| W6BM | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.20
-0.18 | 7,055,633.65
-0.27 | | | WA6ZTY | | | 14,121,570.40
-0.43 |
| |
| W6IHG | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.01
-0.37 | 7,055,633.66
-0.26 | | | WA6ZTY | | | 14,121,570.61
-0.22 |
| Method: Flex 5000A, GPS referenced, in AM mode this test
Soapbox: Ground wave on 40m (unusual) and lots of rapid fading on 80m |
| W6OQI | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.40
0.02 | 7,055,633.70
-0.22 | | | WA6ZTY | | | 14,121,570.60
-0.23 |
| Method: HP 3586 Selective Level meter referenced to HPZ3801 GPS 10 MHz output receiver. The unknown signal is measured using the HP 3586 with the result displayed on the digital readout of the HP 3586. The display gives the frequency to the nearest tenth of a Hertz.
Soapbox: All three signals were S9 or above. Of course, there was multipath on all three signals and thus had to do the usual guessing. |
| W7CQ | OR | W7 | | | 80m | 40m | 20m | | K5CM | | 7,055,633.98
0.06 | | | WA6ZTY | | | |
| Method: A GPS locked ICOM 756 / Spectrum Lab
Soapbox: Nothing on 20 meters.
On 80 a local RTTY signal had a SPACE Frequency signal covering the signal from K5CM.
Better luck next time.
Jimmy |
| W7KBW | MD | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,796.80
359.42 | 7,055,345.62
-288.30 | | | WA6ZTY | | | 14,121,018.57
-552.26 |
| Method: IC-703+ 40-10 dipole, RIG Blaster Advantage, FLDIGI. I let the radio, PC and RIG Blaster warm up for four hours prior to the test. I zeroed FLDIGI and the radio as best I could to WWV.
Soapbox: Good copy on 40m and 20m, a bit noisy on 80m. Overall pleased as I have had to move the antenna from 25 feet AGL to 5 feet AGL for a new roof installation. |
| W7KPZ | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,437.14
-0.24 | 7,055,141.16
-492.76 | | | WA6ZTY | | | 14,122,110.72
539.89 |
| Method: ICOM 718 with High-stability crystal. Indoor wire antenna. Measured frequencies with FLDIGI. Calculated equipment error function with WWV then applied that correction to the measured signals using only hand calculator and pencil.
Soapbox: All signals heard. No QRM. Hope I didn't make any arithmetic errors this time. Great fun as ever. I always look forward to the FMT. Thanks very much! |
| W7PUA | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,437.45
0.07 | 7,055,633.92
0.00 | | | WA6ZTY | | | 14,121,571.20
0.37 |
| Method: IC-706 MKIIG with 30 MHz reference locked to GPS. Audio sound card into Spectrum Lab. Sound card calibrated to GPS.
Soapbox: Always interesting. Signals were good strength, but showed usual sunset Doppler effects. Thanks for the signals! |
| W8BL | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,712.13
274.75 | 7,055,633.16
-0.76 | | | WA6ZTY | | | 14,121,570.58
-0.25 |
| Method: HP 3568B Selective Level Meter, HP 5371A Frequency and Time Analyzer, Efratom rubidium frequency standard
Soapbox: Take one part QRM, stir in a few lightning crashes, add a dash of ham shack disorganization and you have another FMT. I vow to be more organized next time but I've said that before. |
| W8FIB | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,435.97
-1.41 | 7,055,634.08
0.16 | | | WA6ZTY | | | 14,121,570.03
-0.80 |
| Method: Method described in April 2015 QST page 37
K3 S/N 5888 with all options including high stability TCXO.
Checked soundcard against WWV one hour before test.
Checked RX dial error using WWV one hour before test.
Rig is on 24/7 for temp stability. Same with computer.
The FMT method shown in QST is simple and elegant and tightly traceable to NIST standards. Hoping for a close score.
Antenna is 43ft DX Engineering Vertical with 40 radials.
Signals were excellent on all 3 bands.
Soapbox: First time trying FMT. Licensed 1962 |
| W8IMA | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,437.32
-0.06 | 7,055,634.06
0.14 | | | WA6ZTY | | | 14,121,571.10
0.27 |
| Method: IC706MIIg plus Toshiba laptop running Spec Lab all calibrated using wwv. |
| W9INE | CO | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,436.20
-1.18 | 7,055,633.00
-0.92 | | | WA6ZTY | | | 14,121,570.30
-0.53 |
| Method: FLEX-6700
Soapbox: QSB of about 15 dB was experienced. Signals were about -90 dBm. |
| W9ZB | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,438.00
0.62 | 7,055,635.00
1.08 | | | WA6ZTY | | | 14,121,570.00
-0.83 |
| Method: IC706MKIIG CW mode, 250 Hz filter, tuned for CW = CW-R
Soapbox: All signals had QRN, but S9 or better on peaks of QSB |
| WA0YCY | KS | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,393.00
-44.38 | 7,055,194.00
-439.92 | | | WA6ZTY | | | 14,121,020.00
-550.83 |
| Method: Icom 756 ProII. Leader Freq. Counter. Scorpion Screwdriver antenna mounted on the ground due to subdivision rules.
Soapbox: Propagation very good for all three freq. Thank you. |
| WA1ABI | RI | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,437.26
-0.12 | 7,055,633.40
-0.52 | | | WA6ZTY | | | 14,121,570.64
-0.19 |
| Method: WJ-8718 Receiver locked to Rb standard, beat note measured with DL4YHF's Spectrum Lab software.
Soapbox: Good signals on all bands. Thanks to Connie, Mike, and ARRL. |
| WA1N | NH | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,437.00
-0.38 | 7,055,631.00
-2.92 | | | WA6ZTY | | | 14,121,571.00
0.17 |
| Method: Flex 3000 software defined radio. Tweaked DDS to WWV and used Power SDR display to get to within a hertz.
Soapbox: This was a lot of fun. Thank you for setting up the test. |
| WA4FJC | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,437.10
-0.28 | 7,055,633.30
-0.62 | | | WA6ZTY | | | 14,121,571.00
0.17 |
| Method: Trimble thunderbolt, HP 3586B SLM, 20 M beam, 40 M dipole. Very good signals tonight. TNX for the FMT |
| WA6RZW | CO | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,437.50
0.12 | 7,055,633.75
-0.17 | | | WA6ZTY | | | 14,121,569.95
-0.88 |
| Method: FT-1000MP Mk V Field, Heath IG-5218, Tek 2236 |
| WA6ZTY | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.40
0.02 | 7,055,633.87
-0.05 | | | WA6ZTY | | | |
| Method: Adjusted calibrated BFO for ~1000Hz beat then measured beat against standard on scope.
Soapbox: Many errors in system this year, tried to extract them from these measurements, not too confident!
40M signal started out loud but faded. 80M signal was strong but the RTTY QRM was stronger and added trash to scope traces. |
| WA7ZVY | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,435.50
-1.88 | | | | WA6ZTY | | | 14,121,571.50
0.67 |
| Method: FUNcube Dongle Pro+ with SDR# |
| WB0LXZ | KS | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,437.28
-0.10 | 7,055,634.41
0.49 | | | WA6ZTY | | | 14,121,571.26
0.43 |
| Method: HP3586B, HP3335A, Spectrum Lab, 80 meter dipole, 20 meter dipole, Trimble Thunderbolt GPS 10MHz reference frequency source.
Soapbox: Usually I turn in the frequencies as carefully as I can measure them. This time my submitted frequencies include a correction for Doppler shift based on errors in my recent measurements. I added 0.53 Hertz for 20 meters, 0.85 Hertz for 40 meters and 0.3 Hertz for 80 meters. Thanks to all who help provide the test. My antennas are no higher than 30 feet off the ground. -WBØLXZ, Bill EM27pj |
| WB0OEW | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,437.00
-0.38 | 7,055,635.00
1.08 | | | WA6ZTY | | | 14,121,572.00
1.17 |
| Method: KX3 + WWV + iSpectrum
Soapbox: Thanks much! |
| WB2CMF | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,438.55
1.17 | 7,055,633.40
-0.52 | | | WA6ZTY | | | 14,121,571.05
0.22 |
| Method: Kenwood TS-2000, Cushcraft R8 Vertical, Compaq CQ-56 Laptop, Rigblaster PC Interface, Fldigi software in frequency analysis mode.
Soapbox: This is my first FMT. My thanks to the QST article by VE3GSO in the April 2015 QST. I always wanted to give this a try but never thought I had the equipment to. I never thought of using Fldigi until I read the article. I'd be happy if I'm within 5 hertz. I had fun trying. Signal good on 20, a little QSB on 40 and 80. |
| WB3AKD | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.80
-0.58 | 7,055,632.93
-0.99 | | | WA6ZTY | | | 14,121,570.52
-0.31 |
| Method: Westward oriented Beverage antenna feeding ICOM R-75 in CW Reversed Mode w 250Hz BW, tuned to put FMT tone at 600 Hz. GPSDO referenced HP3336B injects a carrier about 50 Hz above the received FMT signal. Spectrum Lab used as a tuning aid, input saved as a .wav file. 3336B frequency Manually recorded. Used MATLAB to take the FFT of the .wav file, then averaged all the bins with significant signal around 600 Hz to get the "test" tone frequency, averaged the few bins with significant reference energy to get the "REF" tone frequency then Subtracted the tone difference from the 3336B frequency to get the FMT received frequency. Worked well with WWV and CHU, I guess we'll see how well it worked with the FMT...
Soapbox: First time I've been able to participate in quite a while and it is just as fun as it was before. New data analysis method was fun to try out. All signals were clear and I did not observe too much fading. |
| WB3JFS | NV | W7 | | | 80m | 40m | 20m | | K5CM | 3,597,512.52
-924.86 | 7,055,589.46
-44.46 | | | WA6ZTY | | | 14,121,530.67
-40.16 |
| Method: TS-2000X with a ground mounted vertical. Home built computer with ASUS Z87-Plus motherboard 3.40GHz processor, 16GB RAM, built in Realtek audio, Windows 7 Pro 64 bit O/S. No processing or filtering of audio output to radio. Spectrum Lab software, NISTime software.
Soapbox: This is my first FMT and was inspired by the April 2015 QST article by Dave McCarter, VE3GSO. |
| WB4ALM | SC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.76
-0.62 | 7,055,633.32
-0.60 | | | WA6ZTY | | | 14,121,570.62
-0.21 |
| Method: ICOM IC-7000; SignaLink USB externa soundcard; FLDIGI/FLRIG software; CPU: AMD FX-8350 Eight-Core Processor @ 2.8 GHZ. Tuned IC-7000 (in USB mode) about 1KHz lower than actual frequency. Resulting audio tone was sampled about 48K a minute. FLDIGI has a frequency analysis mode which was used to calculate frequency. Multiple frequency readouts were taken, and the average reading was used after subtracting an error correction factor. My IC-7000 reads frequencies slightly high at a rate of about 0.22637 cycles per MHz. (error correction factor developing by copying WWV at 5,10,15 MHz and averaging the displayed frequency values from each WWV frequency.
Soapbox: This was my first time of trying this and I had fun! Now we wait to see how close (or far off) we actually were.... |
| WB6BNQ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.40
0.02 | 7,055,634.00
0.08 | | | WA6ZTY | | | 14,121,571.20
0.37 |
| Method: Same ol' analog mixing method on AM.
Soapbox: Fair amount of QSB and doppler due to being in a grey line location for these FMT's. |
| WB6DCE | CA | W6 | | | 80m | 40m | 20m | | K5CM | | 7,055,635.00
1.08 | | | WA6ZTY | | | 14,121,573.00
2.17 |
| Method: Icom R-75 and Spectrum Lab... found typo this is resubmittal ... tune dial for 800 Hz offset tone.. than read dial... this will only resolve 1 Hz
Soapbox: not well set up this time around... |
| WB6HYD | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,437.59
0.21 | 7,055,634.10
0.18 | | | WA6ZTY | | | 14,121,567.70
-3.13 |
| Method: K3, HP3320 synthesizer, HP1740A scope, Eldorado 1650 counter,Spectrum Lab SW. Zero beat audio tone with synthesizer with scope and measured synthesizer with the counter method |
| WB8IMY | CT | W1 | | | 80m | 40m | 20m | | K5CM | | 7,055,655.85
21.93 | | | WA6ZTY | | | 14,121,613.00
42.17 |
| Method: TS-2000 transceiver and Spectrum Lab software as described by VE3GSO in April 2015 QST. |
| WB8TFV | WV | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,437.09
-0.29 | 7,055,633.17
-0.75 | | | WA6ZTY | | | 14,121,570.43
-0.40 |
| Method: IC-756PROII, Spectrum lab, WAVETEK 3002 Sig gen,
Soapbox: Nice signals all bands. 20M was dead until test signal came on +20 |
| WC8J | OH | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,437.69
0.31 | 7,055,634.12
0.20 | | | WA6ZTY | | | |
| Method: ICOM-735, Ratio with markers from HP 8664B signal generator referenced to 10MHz GPSDO.
Soapbox: Thunderstorms in area at time of FMT. |
| WW3S | PA | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,427.06
-10.32 | 7,055,619.96
-13.96 | | | WA6ZTY | | | |
| Method: FT-2000 with LP-PAN, Power SDR and Spectrum Lab software, calibrated per the recent QST article.
Soapbox: got wrapped up watching a baseball game, missed the 20m test !!!! |
| WX4TW | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,436.66
-0.72 | 7,055,636.19
2.27 | | | WA6ZTY | | | 14,121,572.12
1.29 |
| Method: Elecraft kx3 + free software. |
