| Call | QTH | Area | | Method/Soapbox |
| 7L4IOU | DX | DX | | | 80m | 40m | 20m | | K5CM | | | 14,121,963.20
-0.14 |
| Method: IC-7100, Spectrum Lab, HP 8648A
Soapbox: I found weak signal with QRH at the time.
but not confident whether this was the target.
Thank you very much for the interesting event. |
| AA6E | CT | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.50
-0.23 | 7,064,257.09
0.03 | 14,121,963.42
0.08 |
| Method: Flex 6500 + Flex GPSDO + Flex Maestro.
Software: Flex SSDR v 2.1.33; FLDIGI v 4.0.11
Soapbox: Good signals >S8 on all bands. No systematic "physics" corrections. 20 & 40M: 1 sec integrations were averaged over the run. Observed p-to-p freq variations: +/- .08 Hz (20M) and .20 Hz (40M). 80M was almost lost due to cockpit glitch with CSV file, but fortunately some readings were actually written down in real time! Would have helped to weight integrations according to instantaneous signal strength. Maybe next time.
Error analysis is hard because there are significant fluctuations on the 1 min timescale, and we only have 2 min of data. Tried observing WWV & CHU, but it's hard to say much based on this, other than that ionosphere was not particularly disturbed. Kp=2 Ap=9.
Nice event! 73 de AA6E |
| AA6LK | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.72
-0.01 | 7,064,256.93
-0.13 | 14,121,963.17
-0.17 |
| Method: HP Z3805A 10MHz GPSDO, Marconi 2019 HF synth, HP 3325A LF synth, HP
54601A o'scope, FT-847 in AM/narrow mode, 5BTV antenna, Win10 laptop running SpecLab, DigiPan for spotting, EZGPIB controlling Prologix USB-GPIB and USB-Serial to control and interrogate the instruments and radio, GPSCon for monitoring Z3805A; the 2019 was set to inject a reference beat signal to produce a ~400Hz beat tone, and the 3325A was manually tuned for minimum phase slip between it and the beat tone. Each run was also recorded to a .wav file through SpecLab, and at a later time replayed to export data to spreadsheet to recover the "2nd"
frequency and to refine submission numbers.
Soapbox: Thanks Connie for another fine FMT. Strong signals and quiet bands this time. Minimal smearing on 20M signal which is no guarantee it won't be off by a few tenths. Usual smearing on 40M and 80M.
73, L. |
| AB1UY | NH | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.48
-0.25 | 7,064,256.63
-0.43 | 14,121,963.43
0.09 |
| Method: SDRplay RSP2 using WSPR FMT method by Joe taylor, K1JT
Soapbox: Received all 3 frequencies ok. |
| AB2UW | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,169.64
-0.09 | 7,064,257.06
0.00 | 14,121,963.46
0.12 |
| Method: Method: 98' long W5GI dipole oriented E-W connected to Icom IC-7000 (CW mode). SignaLink interface to laptop running Spectrum Lab. During call up, adjusted a GPSDO referenced, HP 3335A frequency synthesizer to about the same frequency. After key-down, switched the radio input to the synthesizer (through an adjustable attenuator) and adjusted the synthesizer to the same frequency (used SL peak detect function). Read each frequency directly off the synthesizer. No radio or computer sound card calibration is needed with this method, but warmed both up for several hours so they were stable during the FMT.
Soapbox: Soapbox: Incredibly, all signals were clearly readable in FN30 with the HF antenna laying on the roof (18' long, 12 year old fiberglass mast supporting the dipole center buckled in a recent snowstorm). At input to the radio, 20m signal was about -80 dBm, 40m signal about -94 dBm, and the 80m signal was about -84 dBm. Observed more doppler shift and QSB on the 80m signal. |
| AB5WG | TX | W5 | | | 80m | 40m | 20m | | K5CM | | 7,064,240.00
-17.06 | |
| |
| AB9TX | WI | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,170.00
0.27 | 7,064,255.00
-2.06 | 14,121,964.00
0.66 |
| Method: ICOM IC-7610 locked to a Harris PFC exciter out of a retired analog IOT broadcast uhf TV transmitter-- zeroed previously to an Evertz Microsystems 6500MSC Master Sync and Clock Generator with GPS conditioning.
Soapbox: Band conditions were good, 20 meter test signal had -23.03db SN, 40 meter signal good -21.82db SN, and 80 meter test signal measuring -31.52db SN using Spectrum Lab. The Icom rig has 1 hz resolution.
Thank you ARRL and K5CM for this fun contest. |
| AC6SL | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,170.00
0.27 | 7,064,257.00
-0.06 | 14,121,964.00
0.66 |
| Method: Elecraft K3 + wsjtx_1.9.3_rc3
Soapbox: This is my 1st FMT participation. |
| AF9A | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,169.77
0.04 | 7,064,257.17
0.11 | 14,121,963.69
0.35 |
| Method: HPSDR Mercury, WSJT-X, OCXO calibrated to CHU and WWV.
Soapbox: Good FMT. 20m signal S8-9, 40m and 80m S9+10 to 20 over. 40m and 80m unusually stable. Great job Connie! |
| AJ5P | MS | W5 | | | 80m | 40m | 20m | | K5CM | | 7,064,257.20
0.14 | 14,121,964.20
0.86 |
| Method: IC-7300, fldigi
Soapbox: Resubmission |
| AJ8T | MI | W8 | | | 80m | 40m | 20m | | K5CM | | | 14,121,961.10
-2.24 |
| Method: Icom IC-7100 with fldigi, confirmed with WWV and GPS disciplined frequency meter.
Soapbox: Reception in Michigan S7 with QRN, but quite readable. Needed beauty sleep, only tried 20m.. |
| K0DSP | NE | W0 | | | 80m | 40m | 20m | | K5CM | | 7,064,169.07
-87.99 | |
| Method: ICOM IC-718, WSJT-X on a Raspberry PI 3+
Soapbox: First time at this. I am still a little fuzzy how to work this software but this definitely was fun trying!
Thank you a bunch for doing this Connie. |
| K1GGI | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.60
-0.13 | 7,064,257.15
0.09 | 14,122,169.60
206.26 |
| Method: Beat with known oscillator, measure with SpectrumLab
Soapbox: Good sigs from a piece of wire tied to a stepladder (storm damage needs work and warmer weather). Thanks to Connie and ARRL. |
| K1IG | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.63
-0.10 | 7,064,257.20
0.14 | 14,121,963.59
0.25 |
| Method: K3 with TXCO, MacBook Pro running Fldigi in Frequency Analysis mode. Buddipole antenna tuned for 40 meters mounted on condo balcony. Took WWV calibration measurements immediately before and after each run and averaged them.
Soapbox: 20 meter signal was S8 with slight atmospheric noise. 40 meter signal was S9. 80 meter signal was S3 with QRM and fading, but readable throughout the test. |
| K3KO | FL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,947.99
778.26 | 7,064,257.09
0.03 | 14,121,963.42
0.08 |
| Method: K3/HP REF OSC/RB standard +Murphy
Soapbox: Consider this a practice run.
Sig gen for ref osc refused to be set to desired freq! Worked fine 5 min earlier. Clip lead ant + spare Rb locked osc pressed into service. Brain left a digit out of some transcribed frequencies. |
| K4BYN | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.74
0.01 | 7,064,257.18
0.12 | 14,121,963.89
0.55 |
| Method: Using Yaesu FTdx-5000 running WSPR frequency measuring procedure and software from November 2010. 135 ft multiband antenna with tuner used for reception on all three bands.
Soapbox: I thought all signals were strong, not much QSB at all here in FM05qu. Just my 3rd FMT but glad I had a good copy. Data analyzed and "crap" disposed before my final guess work took place. |
| K4CXX | FL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.48
-0.25 | 7,064,257.17
0.11 | 14,121,963.54
0.20 |
| Method: N-S 50 foot long antenna into receiver with coupled output from 0.1 Hz resolution synthesizer, whose output was compared for reference with WWV-15 or WWV-10 immediately after measurements. Both measurements and comparisons were done with aural zero-beating using the Double Carrier Heterodyne Technique. Derived frequency errors in the synthesizer reference oscillator from the WWV comparisons were then used to correct the measurement readings.
Soapbox: Propagation conditions were good into central Florida; WWVH was also heard with no difficulty during post-measurement calibration cycles with WWV. WWV and WWVH at 15 MHz dropped out sometime after 0220 GMT, so scheduling the 20 m run earlier than the 80 and 40 m runs was beneficial. The FMT is a continuing source of esoteric fun, technical challenge, and satisfaction. Gratitude and appreciation are due Connie, K5CM, and his colleagues for their commendable efforts and contributions to maintaining and improving the art and science of HF frequency measurements. Thanks to all who made this possible. |
| K4PPK | FL | W4 | | | 80m | 40m | 20m | | K5CM | | 7,064,258.80
1.74 | 14,121,964.30
0.96 |
| Method: Icom IC-7300 and Fldigi.
Soapbox: I enjoyed my first attempt at this. Nice strong signals on 20 and 40 meters but could not find the 80 meter signal. Thanks for putting it on. |
| K5ND | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.34
-0.39 | 7,064,257.28
0.22 | 14,121,963.04
-0.30 |
| Method: 20 to 6 meter vertical antenna, Icom IC-9100 receiver, WSJT-X frequency calibration mode.
Soapbox: My first time in the Frequency Measuring Test. All went well including solid copy of 40 and 80 meters with my 20-6 meter vertical. |
| K5RKS | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.71
-0.02 | 7,064,257.18
0.12 | 14,121,963.62
0.28 |
| Method: Inject signal from HP3339B into antenna along with off the air signal from K5CM. Measure difference in frequency of audio tones from receiver which is running in USB mode. Using homebrew software. HP3336B uses external 10Mhz reference signal from GPSDO.
Soapbox: Signals on all three bands were solid here in Central Oklahoma. |
| K5XL | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.78
0.05 | 7,064,257.15
0.09 | 14,121,963.65
0.31 |
| Method: Anan-10E SDR with Trimble Thunderbolt GPSDO. Using Spectrum Lab to measure the tone in USB while tuned close to 500 hz below the signal. Added the VFO freq to the measured tone frequency. Applied estimated doppler from observing WWV on 15Mhz for 20M and 5Mhz for 40/80M. Antenna is Force12 C4 on 20M / 40M and dipole for 80M.
Soapbox: Signal was Q2 on 20M and Q5 on 40M / 80M here in EM12kp (DFW TX). The 20M signal was very unsettled. Thanks to Connie and ARRL for the FMT! My last attempt was April 2014. |
| K6APW | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.70
-0.03 | 7,064,256.80
-0.26 | 14,121,963.60
0.26 |
| Method: Receiver characterized with WWV and CHU. CW mode offset nulled to digital audio generator through audio hybrid combiner.
Soapbox: Call up on 20M stronger than during the keydown, then pretty noisy, too.
Equipment failure during last minute of 80M transmission. |
| K6UM | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,168.89
-0.84 | 7,064,255.90
-1.16 | |
| Method: Elecraft K3 with EXTREF option
HP 0960-0477 OCXO (Ovenaire)
WSPR/FMT 2.12
Soapbox: Didn't get a 20m reading. I forgot that Win10 had recently updated, which means that the soundcard mappings were scrambled. WSJT-X and MMTTY had been fixed, but forgot to fix WSPR. |
| K7HKR | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.85
0.12 | 7,064,254.95
-2.11 | 14,121,831.67
-131.67 |
| Method: $20 RTL-SDR dongle with $40 upconverter, my usual AM BCB and SWL receiver. 10'x18' corner-terminated receiving loop. Calibrated with CHU and WWV, but the limited bandwidth of the SDR may have caused major calibration problems on 20 and 40. Used my own code to analyze the raw SDR files after doing the recordings live.
Soapbox: My first time for this test. I wanted to see how well I could do with very inexpensive equipment. No problems with signal strength even with a bit of QSB. The 20/40 results could be way off, but I think 80 should be okay. |
| K7KMQ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.49
-0.24 | 7,064,256.91
-0.15 | 14,121,963.04
-0.30 |
| Method: FT-101EE receiver, HP 3325A with GPSDO time base. Heterodyned with unknown, measured beat note on Android tablet running Keuwlsoft spectrum analyzer software. Long wire antenna.
Soapbox: Nice signals on 40 and 20. 80 was very noisy, lots of QSB. Lucky to get an 80 meter measurement at all.
Thanks Connie. |
| K7UCY | OR | W7 | | | 80m | 40m | 20m | | K5CM | | 7,064,257.12
0.06 | 14,121,963.23
-0.11 |
| Method: Kenwood TS-590SG/tcxo with WSJT-X to collect raw FMT and WWV calibration data. Excel analysis to filter and interpolate data.
Soapbox: Great signals on 20m and 40m. No propagation on 80m. Looking forward to the next FMT! |
| K8CT | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,169.58
-0.15 | 7,064,257.16
0.10 | 14,121,963.57
0.23 |
| Method: GPS disciplined Anan 10E. WWV doppler correction. Spec Lab and Excel data manipulation.
Soapbox: All signals were good, S8+ in southern Michigan. Tnx to Connie and all who organized the test. |
| K8DJR | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,169.90
0.17 | 7,064,256.60
-0.46 | 14,121,962.80
-0.54 |
| Method: ICOM IC 756 PRO III , I-PHONE AUDIO FREQUENCY GENERATOR APP AT 1000CPS
CALIBRATED DIAL WITH WWV ON 2.5,5.10 AND 15 MHz
Used Lissajous figures on Oscilloscope to match tones on WWV and also FMT signals. |
| KA1BQP | RI | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.77
0.04 | 7,064,257.24
0.18 | 14,121,963.48
0.14 |
| Method: Watkins Johnson WJ-8718A with Rb Frequency Standard DL4YHF Spectrum Lab Software. Tune just below carrier, add dial reading to measured beat note.
Soapbox: Connie's signals on 20 and 40 were rock crushing. Somewhat less on 80 with some QSB, yet perfectly readable. Significant Doppler this evening.
Great job as always, Connie! Thanks! |
| KA5QEP | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.72
-0.01 | 7,064,257.20
0.14 | 14,121,963.50
0.16 |
| Method: Harris RF-590, audio recorded to .wav files and analyzed with Mathematica notebook signal processing.
Soapbox: 20: Signal was weak but readable with some noise.
40: Good reception, some fading. Analysis showed the carrier drifting over about 1 Hz.
80: Excellent reception. Very little frequency drift.
Better conditions than most of the other FMTs I've participated in. |
| KB1OIQ | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.47
-0.26 | 7,064,257.14
0.08 | |
| Method: ICOM 7300 and Fldigi running on my Linux laptop.
Soapbox: This is my first time participating in the FMT. The 40m signal was quite strong, perhaps S7-S9. The 80m signal was only about an S3 with QSB. |
| KB4DU | AL | W4 | | | 80m | 40m | 20m | | K5CM | | 7,064,265.10
8.04 | 14,121,969.50
6.16 |
| Method: IC-7200, HP elite laptop, digipan |
| KC8BNP | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,170.38
0.65 | 7,064,259.63
2.57 | |
| Method: Yaesu FT-1000MP referenced to WWV 5Mhz and 10Mhz, and Android app - Science Journal to measure the audio freq. Yaesu set to .625hz steps.
Soapbox: Using a loop in the ground antenna I picked up the 40m and 80m transmissions without any issue, no signal detected on 20m(LOG doesn't work that well at 20m and above). |
| KD2BD | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,169.45
-0.28 | 7,064,257.04
-0.02 | |
| Method: All homebrew equipment including a carrier phase tracking receiver, a WWVB referenced frequency standard, and a frequency counter. Measured signals were received using an open-wire fed 80-meter dipole. 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. Details available at: http://www.qsl.net/kd2bd/fmt-methodology.html
Soapbox: Sacrificed the 20-meter run and a chance at the "Green Box" to correct technical issues that plagued last November's measurements. The Kp index was 1, and Connie's signals were exceptionally strong on both 40 and 80 with no QRN, QRM, or serious QSB issues. Thanks to all for keeping this technically challenging, educational, and time honored Amateur Radio tradition alive! 73.000 de John, KD2BD |
| KD5FX | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,171.14
1.41 | 7,064,258.56
1.50 | 14,121,965.85
2.51 |
| Method: Stock FLEX 6300 with Spectrum Lab s/w
Soapbox: I'm only 122 miles from K5CM, I was afraid I wouldn't hear him on 20 mtrs but he was S7 to S3 here, S9 to S5 on 40 and 30 over S9 on 80! |
| KD5MMM | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,170.50
0.77 | 7,064,257.00
-0.06 | 14,121,964.20
0.86 |
| Method: ft847, signalink, spec lab, excel
Soapbox: Strong sigs on 80m & 40m, 20m was a bit noisy.
Hope I'm close.. 73 all |
| KF3BH | PA | W3 | | | 80m | 40m | 20m | | K5CM | | 7,064,255.06
-2.00 | |
| Method: IC-7410 Ham Radio Deluxe (DAT) Spectrum Lab FFT software
Soapbox: Been a ham for 36 years but first time trying the FMT. Very good signal in NE PA. Thanks and 73's |
| KF7NP | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.73
-0.00 | 7,064,257.08
0.02 | 14,121,963.22
-0.12 |
| Method: My setup consists of a GPSDO I have designed and built. It has a 24Mhz output which drives the reference input to an SDRplay RSP2pro SDR. The SDR is controlled using SDR Console Version 3. The output of the SDR Console software is fed to the WSJT software using a virtual audio cable. The WSJT software is operated in the frequency calibration mode. The receiver is set to USB and tuned to approximately 1500 Hz below the carrier frequency.
In this mode the WSJT software will display the frequency to .001 Hz. Since the data is only digitized once in the SDR using the clock derived from the GPSDO the PC running the SDR Console and WSJT software does not appear to introduce any errors due to the PC clocks. If I feed any of the outputs (10, 24 or 96 MHz) from the GPSDO
into the SDR the frequency is always displayed as 1500.000 Hz in WSJT and will track even if there is a slight change in the frequency of the GPSDO. There is a requirement that the frequency displayed at the center frequency of the spectrum display in the SDR Console software be a multiple of 1Khz otherwise the software introduces an offset of .2 to .4 Hz.
Soapbox: This was my second FMT. My setup was similar to April's FMT with the exception of an improved GPSDO. My previous unit was a breadboard with a less than ideal oscillator. The current units are finished PWBs with a slightly better VCOCXO. It is a 1 inch square unit with a metal can so it is small with a single built in oven and controller.
The good news is it operates off 3.3 volts and because it only requires 3 watts it can be powered off a USB 3 port for portable use.
I did notice during the 20 meter transmission at about 1 minute in the frequency suddenly started increasing at a fixed rate for about 45 seconds. The change was about .08 Hz. It then started decreasing at the same rate. The plot during this time was very smooth without the normal variations I frequently see. Being new to the FMT game could this be caused by an aircraft or satellite reflection? I had 2 identical setups operating at the time and both showed the same data. The only thing in common was they were both fed by the same antenna. I replayed the data captured on the output of the SDR and got the same result. |
| KG5X | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.85
0.12 | 7,064,256.90
-0.16 | 14,121,963.70
0.36 |
| Method: RSP2 Calibrated with WWV |
| KI5EE | LA | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.83
0.10 | 7,064,256.93
-0.13 | 14,121,963.82
0.48 |
| Method: I used Spectrum Lab program, OptiPlex 3010 computer, Kenwood TS-2000 radio, 80 meter inverted V antenna, 40 meter inverted V antenna and 5 band Mosley beam for 20 meters.
Soapbox: Signals were strong and clear. There was some Doppler shifting as expected. |
| KJ6HYC | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,170.00
0.27 | 7,064,256.98
-0.08 | 14,121,962.90
-0.44 |
| Method: 10MHz OCXO Frequency Standard, HP5334B (Opt.10-30), IC-7300, 100W 30Db Attenuator, 2W 30 Db Attenuator, 160M Loop Antenna W/ 4:1 Balun.
Warmed up all equipment 24hrs in a temperature controlled environment, Calibrated the IC-7200 W/10MHz OCXO, Recorded frequency readings, Connected the Attenuators between the HP5334B and the IC-7300, Transmitted on low power at previous recorded Freq. readings using HP5334B on 100 Gate Average. |
| KL2KL | MA | W1 | | | 80m | 40m | 20m | | K5CM | | | 14,121,975.00
11.66 |
| |
| KM6QX | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.55
-0.18 | 7,064,256.27
-0.79 | 14,121,963.14
-0.20 |
| Method: Receiver is Flex-1500 locked to GPSDO. Received in CW mode, fixed AGC, and analyzed ~600 Hz tones with Spectrum Lab. Selected most probable spectrum peak then corrected for Flex’s DDS VFO offset.
Soapbox: All 3 signals very strong. Spectrum bins more symmetrical than usual thus 'right side' bins not obvious as true frequency. Here on west coast, Sun didn't set until after FMT runs so expected to see usual Doppler shifts. |
| KN1H | NH | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.56
-0.17 | 7,064,256.95
-0.11 | 14,121,963.67
0.33 |
| Method: IC-7200 and SpectrumLab on Windows XP. Calibrated radio and computer using WWV and CHU signals. Averaged about 100 samples of each transmission and applied corrections.
Soapbox: My main concern was being able to copy K5CM on all bands with the unfavourable conditions we've had of late. Not to worry, 599 and QRM- free on all bands! Thanks, Connie for providing great signals for us to work with! |
| KQ2RP | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,166.00
-3.73 | 7,064,257.50
0.44 | 14,121,963.50
0.16 |
| Method: Method? What method? Checked KX3 against WWV and used spot centering feature, averaging results from numerous button-pushes.
Soapbox: Just playing around. Remembered at the last minute. Almost missed the first callup. |
| N1IRO | VT | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.64
-0.09 | 7,064,257.14
0.08 | 14,121,963.47
0.13 |
| Method: Kenwood TS-2000 with Ext 15.6 MHz Ref from Bodnar GPSDO, into SpectrumLab on computer soundcard.
Soapbox: Lots of doppler shift but I averaged best I could. Thanks for doing this! |
| N2GL | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.20
-0.53 | 7,064,256.70
-0.36 | 14,121,963.20
-0.14 |
| Method: 80/160 fan dipole, HP 3586A Selective Level Meter in counter mode, HP Z3816A GPS disciplined oscillator reference, Tektronix 2245A Oscilloscope in x/y mode
Soapbox: Good signals all around. Thanks Connie and all! |
| N3FG | PA | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,169.69
-0.04 | 7,064,257.12
0.06 | 14,121,963.35
0.01 |
| Method: K3, Spectrum Lab, WWV, 40M dipole.
Soapbox: Good signals on all 3 bands. Thanks again to K5CM for another great event. |
| N3SXI | PA | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,169.68
-0.05 | 7,064,257.56
0.50 | 14,121,963.84
0.50 |
| Method: Sideband offset measurement. Yaesu FT-991, Fluke frequency counter, H-P calculator.
Soapbox: Calibration with WWV and CHU. |
| N4VSD | TN | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.72
-0.01 | 7,064,256.76
-0.30 | |
| Method: HF receiver. Windows SDR software. DPS disciplined oscillator. |
| N5DM | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,170.00
0.27 | 7,064,257.35
0.29 | 14,121,965.30
1.96 |
| Method: Yaesu FT-3000 w/DigiPan. Triband Yagi and Dipoles.
Soapbox: K5CM Sigs: 20m/S2 (Very Quiet Band), 40m/S9 (Solid), 80m/S9+10 (Solid). |
| N5LUL | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.77
0.04 | 7,064,255.98
-1.08 | 14,121,961.99
-1.35 |
| Method: Yaesu FT950 zero beat to 5Mhz WWV signal. Reading 17hz high. Created "fudge factor" of .9999966 and multiplied display reading by that.
Soapbox: Super surprised the 20M signal was heard so well in Amarillo this evening! |
| N5OHL | OK | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,138.00
-31.73 | | 14,121,974.00
10.66 |
| Method: Icom IC-706mkIIg/OCF dipole at 40 feet/ Put radio in CW mode with 500 hz filter and just did my best guess by ear
Soapbox: Great signal on 20 meters and even better on 80 meters. I got a phone call so I missed the 40 meter test. Thanks very much and 73 Jim N5OHL |
| N6SKM | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.50
-0.23 | 7,064,256.91
-0.15 | 14,121,963.13
-0.21 |
| Method: Yaesu FT857D stabilized by GPSDO. Receive audio coupled to Mac Mini via SignaLink USB. Excel processed fldigi's csv files.
Soapbox: Thanks again for a great FMT, Connie! All three signals were strong with minimal fading, but they did have a bit of QSY to make things interesting! This year I finally used fldigi to adjust the SignaLink/MacMini sound card linkage. It turns out the timing was 20PPM off, so hopefully I'm a tiny bit closer to the right answer this time (and didn't make some sort of hideous math or data entry error)! |
| N7EP | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.82
0.09 | 7,064,257.30
0.24 | 14,121,963.43
0.09 |
| Method: Icom IC-7300 Xcvr, WWV, CHU, Spec Lab software and lots of luck.
Soapbox: Very nice signals from K5CM. All S9+ with some fading on 80 M. Not much doppler either, so I have no excuses. Thanks ARRL and K5CM for these tests. Great fun. |
| N7WS | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,170.00
0.27 | 7,064,258.50
1.44 | |
| Method: SDR-IQ/ApectraVue software with Bodnar GPSDO reference. Direct readout of marker frequency.
Soapbox: My first time doing this. I had plans for a more elaborate method but a medical emergency precluded that and made me miss the 20 meter test. |
| N8OB | OH堤 | | | | 80m | 40m | 20m | | K5CM | 3,598,169.70
-0.04 | 7,064,256.91
-0.15 | 14,121,296.35
-666.99 |
| Method: Flex 6300 calibrated against GPS Disiplined Oscillator, Spectrum Lab
Soapbox: Signals on all frequencies were very good. My first FMT in several months so was not sure if I remembered how to do things. Thanks to Connie for another great time. |
| N8OEC | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,600,849.68
2,679.95 | 7,065,781.24
1,524.18 | |
| Method: IC-9100 random wire antenna
fldigi analysis
Soapbox: lost 20m file |
| N8OOU | IL | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,170.10
0.37 | 7,064,257.50
0.44 | 14,121,964.50
1.16 |
| Method: Kenwood TS-480 radio and a computer to count cycles above a U3S/GPS ref signal.
Soapbox: In the Nov, 2017 FMT (my first FMT) I made a rookie mistake of adding in the radio CW offset, when the radio had done it all ready. In this test I hope that my results get me in the ballpark without that mistake. I received strong signals on all three bands for this test. |
| NK6P | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.51
-0.22 | 7,064,256.89
-0.17 | 14,121,963.11
-0.23 |
| Method: Cesium beam standard used as a reference for an HP3586B. Thew 3586B audio then was analyzed using tuned SpectrumLab software through a Steinberg 242 external USB audio interface running at 192K sample rate. I then used recordings from SpectrumLab to find the frequency peaks, exported this to Excel where I used a few techniques to eliminate noise and doppler. After all this, I am probably not even in left field. ha!
Soapbox: Nothing to rant about other than on 20M I was confused with how to setup my equipment and might be off by 1850hz. Also, I tried to use my RSP2Pro SDR and couldn't figure out how to get the resolution after going through the trouble of making a reference injector. I verified the frequency using my new IC-7610 which was running without a reference but it was still close. I thought I could just use the RSP2Pro but couldn't get the resolution out of SDRuno and didn't have time to get any other software working. Enough said, the time screams by when we do the test.
Good luck to the newcomers, this is my 4th.
Jerry, NK6P formerly KG6KGP |
| SV8QG | DX | DX | | | 80m | 40m | 20m | | K5CM | 3,598,169.55
-0.18 | 7,064,257.11
0.05 | |
| Method: My trustworthy setup Flex-1500 locked to GPS Argo139 for data acquisition, using CHU for Doppler correction and SpecrumLab running in parallel to average the measurements.
Soapbox: If I hear the station I can measure the frequency with the accuracy of the ionospheric drift permits (uncertainty 0,35 Hz at 40m and 0.45 at 80m). 20m band was dead (nil from CHU @ 14.670 MHZ also) 40m weak signal but clear and 80m huge QRM (a faint trace). I will never be in the ‘green box’ as always one band will be absent due to propagation conditions. I suppose to be the farthest station… Maybe it is my last MFT… or I need something new in the shack. |
| VA3FLF | ON | VE | | | 80m | 40m | 20m | | K5CM | | 7,064,281.00
23.94 | 14,122,020.00
56.66 |
| Method: RSP1 using SDRuno |
| VE2IQ | ON | VE | | | 80m | 40m | 20m | | K5CM | 3,598,169.73
0.00 | 7,064,257.10
0.04 | 14,121,963.63
0.29 |
| Method: Dipole > TS850[CW-narrow] > Sound Card, measure near-800-Hz tone. TS850 clocked with external 20-Mhz GPS standard. Corrected for calculated Rx conversion offset. Audio sample rate monitored during test against 1-pps GPS output. Average freq over keydown interval. No Doppler guess.
Soapbox: Thanks again to Connie for excellent signals on all bands. Noted WWV 15 Mhz Doppler was stable -0.1725 Hz just before 20 M run but -0.0848 Hz afterwards so no confidence in that! Wish I had ionospheric data above Ft. Wayne IN during keydown times. |
| VE3OAT | ON | VE | | | 80m | 40m | 20m | | K5CM | 3,598,169.69
-0.04 | 7,064,257.04
-0.02 | 14,121,963.52
0.18 |
| Method: Using AM detection of beat note between unknown signal and GPS-referenced signal generator, SpectumLab software to measure the audio beat note, 10 MHz ref from Trimble Thunderbolt GPS receiver to lock the sig gen.
Soapbox: Good sigs on all bands with 20m the strongest and 80m weakest, as usual. But results on 20m were weird -- plot of freq measurements (one per second) clearly shows about one and a half cycles of sinusoidal deviation in frequency during the two minute run, deviation +/- 0.10 Hz from average with little "noise". The lack of noise (scatter) was itself remarkable, but the "FM" on K5CM's signal was unique in my experience. |
| VE3YX | ON | VE | | | 80m | 40m | 20m | | K5CM | 3,598,169.55
-0.18 | 7,064,257.15
0.09 | 14,121,963.58
0.24 |
| Method: TS870 with GPSDO. Fldigi did the work.
Soapbox: Very large frequency swings from doppler made guestimation quite difficult. All frequencies but 20 including CHU and WWV had +/- 0.5 Hz swings. 20 was S9 to 30 over. 40 and 80 were S7 to S9. Signals were good, just hard to analyze.
Thanks again Connie |
| VE6GRT | AB | VE | | | 80m | 40m | 20m | | K5CM | 3,598,169.40
-0.33 | 7,064,256.90
-0.16 | 14,121,964.00
0.66 |
| Method: SDR Play Receiver feeding audio to homebrew frequency measuring software. Calibration using WWV 2.5 Mhz through 15 Mhz. Antenna - Beam for 20 meter, inverted V for 40 and 80m. With assistance from Russ VE6CGO and Heinz VE6AQW
Soapbox: Thanks for the FUN! |
| VE9DAN | NB | VE | | | 80m | 40m | 20m | | K5CM | 3,598,165.80
-3.93 | 7,064,250.50
-6.56 | 14,121,956.50
-6.84 |
| Method: SDRplay + SDRuno + FLdigi
Calibrated using 10MHz only.
Couldn't get Uno to talk to FLdigi so didn't use the Freq Analysis tool.
Soapbox: Excellent signals on all 3 bands. Zero QRM. You couldn't have picked better frequencies to play on. Reported freqs are what I read off the SDRuno window when hovering the mouse cursor over the trace. I would like to see the FMT held more frequently ... perhaps 4 times per year. At the current interval, I forget everything...even with notes. |
| W1KU | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,603,169.82
5,000.09 | 7,069,257.02
4,999.96 | 14,126,963.35
5,000.01 |
| Method: E-MU 0204 soundcard and RS-HFIQ SDR with Fox924 TCXO for LO. Spectrum lab. 192 KHz sampling rate decimated by 12, 262144 input FFT. Over-the-air offsets calculated from CHU3.3, WWV5, and WWV10, and WWV15 and interpolated linearly.
Soapbox: Strong signals except for some QSB on 40 meters. I also noticed a significant shift in WWV15 offset between 15 minutes prior to and just prior to the 20m test. |
| W1LMT | NH | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,170.00
0.27 | 7,064,257.50
0.44 | 14,121,000.00
-963.34 |
| Method: Icom 7300 with Autotune, eyeballs |
| W1PJE | MA | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,151.36
-18.37 | 7,064,252.24
-4.82 | 14,121,962.25
-1.09 |
| Method: 40m dipole + NetSDR + Calibration with Trimble 10 MHz OCXO + custom Gnuradio stack + Digital RF (https://github.com/MITHaystack/digital_rf) + Python/Numpy/Scipy custom scripts
Soapbox: First FMT; calibration of ionospheric Doppler was a bit of a challenge at this QTH for 80m test. All 3 carriers received well though. Don't think I'd be fast enough in realtime without I/Q recording and ability to replay until it looked right. Hopefully the answers are somewhere within the ballpark. Hats off to K5CM for a very fun exercise! 73s to all. |
| W2FD | PA | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,169.70
-0.03 | 7,064,257.10
0.04 | 14,121,963.50
0.16 |
| Method: TS-450S/AUDIO GENERATOR/SCOPE/FREQUENCY COUNTER/ Measured audio output from receiver (~600 Hz) when dial frequency is near received frequency with both CW and REV CW modes. Compared audio frequency from stable audio generator (measured with frequency counter) and receiver audio output using oscilloscope. Receiver calibration was accomplished by measuring WWV signal at 15 megahertz.
Soapbox: All signals were strong at this location. Noticed considerable rapid variation in the signal phase and frequency particularly on 40 and 80 meters tonight for the signal path to OK. WWV signal on 15 megahertz also was somewhat erratic. Thanks Connie for your efforts for another good test and to Bruce for handling the data on the website. |
| W2JTM | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,170.54
0.81 | 7,064,257.18
0.12 | 14,121,963.06
-0.28 |
| Method: Kenwood TS990/Zero beat and a stop watch. |
| W2TX | FL | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.71
-0.02 | 7,064,257.10
0.04 | 14,121,963.54
0.20 |
| Method: RF-590 RX and EMU-0202 both locked to GPSDO. 20M dipole for all 3 bands. Used SL to measure audio tone from RX. |
| W3DAD | MD | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,169.19
-0.54 | 7,064,256.65
-0.41 | 14,121,963.47
0.13 |
| Method: OCXO 10MHz Std, K3s/TCXO, Spectrum Lab. Calibrate RX to WWV/CHU, record dial frequency and beat frequency of unknown, apply any corrections, then calculate actual test frequency.
Soapbox: More Doppler this time which caused difficulty in obtaining values for calibration. I plot this out using graph paper. Also made the measurements more difficult, but used averaging to get my final numbers. Signals strong on all three bands here in MD. Thanks, enjoyed the challenge. I like the extra long call ups. 73/Kevin |
| W3JW | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.74
0.01 | 7,064,257.39
0.33 | 14,121,963.77
0.43 |
| Method: Flex 6700 (with internal GPSDO) into Spectrum Lab
Soapbox: 20 M signal was S9+5 dB, 40 M signal was S9+10 dB and the 80 M signal was S9+10dB. Doppler and multi-path were moderate. Tnx to Connie and all who make the event a success! |
| W4IVF | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.70
-0.03 | 7,064,256.87
-0.19 | 14,121,963.65
0.31 |
| Method: GPS-locked generator injected into receiver input. Difference between known and unknown measured with Spectrum Lab.
Soapbox: Strong signals on all bands with lots of doppler. Thanks to all for making the FMT happen. |
| W4VU | NC | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.50
-0.23 | 7,064,257.10
0.04 | 14,121,963.60
0.26 |
| Method: HP3586B with OCF antenna at 25 ft. Used external Trimble $20 eBay 10MHz oscillator calibrated to WWV. Read freq off screen for 20 and 40M - good signal lock.
Soapbox: Thanks Connie! Signal in NC was -67 dBm on 20M, -70 dBm on 40M, and -67 dBm on 80. For 80M took 42 measurements, then took mean, median, 95th and 98th percentile. Used Median. |
| W4WJ | TX | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.76
0.03 | 7,064,257.19
0.13 | 14,121,963.69
0.35 |
| Method: GPS: Lucent/Symmetricom Z3810AS
RECEIVER: GPS Locked RACAL 6790/GM
Tunable in steps of 1000Hz, 30Hz or 1 Hz.
SYNTHESIZER: GPS Locked HP 3336B
ZERO BEAT INDICATOR: Tektronix 2213A
ANTENNAS: GAP Voyager, GAP Titan DX, NVIS Dipoles 40 & 80m
CONFIGURATION: The post-filtered 455 KHz IF from the RACAL is fed to CH A
of the Tek. A precise 455,000.000Hz carrier from the HP3336B is fed to the EXT input channel of the Tek. The scope is then set to display 2 cycles of the 455KHz IF waveform, instead of a traditional Lissajous pattern.
PROCEDURE: Frequency readings to 1Hz resolution are quickly made by tuning the RACAL to near zero beat with the aid of the Tek scope. If a signal is “dead on”, such as WWV, and there is no Doppler, the waveform will not “slip” in either direction but will just vary in amplitude with changes in signal strength. If the waveform is moving >>>, the RACAL is tuned BELOW exact zero beat. If the waveform is moving <<<, the RACAL is tuned ABOVE exact zero beat. If “stepping” the receiver 1Hz causes the direction of "slip" to reverse, the exact frequency is BETWEEN the current and former readout, i.e. between two concurrent 1Hz points. Also, estimates closer than 0.5Hz, of the actual
frequency, can be made by comparing the "speed" of the ABOVE and BELOW "slip." The slower "slip" is less than 0.5Hz from that 1Hz point.
For more accurate “in-between-Hz” measurements, the RACAL is tuned ABOVE the unknown frequency and the HP3336B is then tuned upward, in 0.001Hz steps, from 455,000.000Hz until the right to left waveform movement stops. The milliHz DELTA is then SUBTRACTED from the RACAL readout to give the “exact” frequency.
The AF DELTA is simply the result of subtracting the lower frequency from
the higher frequency.
Using a regular scope waveform allows very quick “zeroing” of signals, even those that are nearly in the noise. I find it much easier to use than the Lissajous
pattern. It is also very interesting to note the carrier frequency variances that occur during Doppler shift.
Soapbox: 20m rough here... -120dBm with bad doppler; 40m -60dBm with minimal doppler; 80m -65dBm some QSB light doppler... Connie, TNX for all your work towards the regular FMTs. 73, Don, W4WJ |
| W5LAC | MS | W5 | | | 80m | 40m | 20m | | K5CM | 3,598,169.50
-0.23 | 7,064,257.00
-0.06 | 14,121,964.00
0.66 |
| Method: Use calibrate function on Flex-3000 to calibrate to nearest in frequency WWV or CHU station. Use LSB mode to generate 440 Hz tone as measured with Roland VT-12 vocal trainer (Similar to a guitar tuner.) Subtract
440 HHz from display on Flex. Lots of operator error possible :)
Soapbox: Thanks again to K5CM and ARRL ! |
| W6BM | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.45
-0.28 | 7,064,256.80
-0.26 | 14,121,963.12
-0.22 |
| Method: SP-600JX17, 4 GPS-stabilized synthesizers, dual-trace scope
Soapbox: Revised submission. All heard, bad doppler, Thanks to Connie |
| W6DSR | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.34
-0.39 | 7,064,256.84
-0.22 | 14,121,963.14
-0.20 |
| Method: Coherent receiver locked to GPS disciplined 10 MHz standard with output sent to 12 digit counter. Counter recorded at 100 msec interval via GPIB. Least-squares linear fit to 2 minute collect.
Soapbox: 80 meter noise level at receiver input = -100 dBm, signal level = -60 dBm. 40 meter noise level = -106 dBm, signal = -50 dBm. 20 meter noise level = -104 dBm, signal = -60 dBm. All were good strong signals from K5CM but he is only 1550 miles away.
Thanks to K5CM for a fun contest. |
| W6OQI | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.60
-0.13 | 7,064,257.10
0.04 | 14,121,963.30
-0.04 |
| Method: HP 3586B selective level meter locked to HP Z3801 GPS receiver
Soapbox: Connie had great signals on all bands in at my QTH in Southern California. Had the usual Doppler shift on 40 and 80. |
| W7DMR | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.31
-0.42 | 7,064,256.48
-0.58 | 14,121,963.13
-0.21 |
| Method: GPSDO -> HackRF SDR & Marconi 2051 siggen
HDSDR Software, custom numpy/scipy/peakutils program
Calibrated to WWV 5 & 10 MHz
Soapbox: Harder that I expected but I finally had a chance to try it. Thanks
Lots to learn and test for next year. |
| W7GW | IL | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,169.60
-0.13 | 7,064,257.38
0.32 | 14,121,963.57
0.23 |
| Method: K3 synched to GPSDO |
| W7KPZ | OR | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.52
-0.21 | 7,064,257.21
0.15 | 14,121,961.71
-1.63 |
| Method: ICOM IC-718 with CR-338 High Stability crystal. Indoor wire antenna. FLDIGI software on Windows 7 computer. Calibrated from WWV. Calculated correction applied to measured FMT frequencies.
Soapbox: Fun as always. Thanks to K5CM. I hope I didn't make any careless arithmetic errors this time! |
| W8BL | MD | W3 | | | 80m | 40m | 20m | | K5CM | 3,598,169.62
-0.11 | 7,064,257.27
0.21 | 14,121,963.69
0.35 |
| Method: Efratom rubidum frequency standard, SR-224 transciever modified from crystal to PTS synthesized IF.
Soapbox: Good STRONG signals here in southern MD. |
| W8EDU | OH | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,169.66
-0.07 | 7,064,257.17
0.11 | 14,121,935.00
-28.34 |
| Method: Spectrum labs, soundcard calibrated against WWV using fldigi's WWV function.
FTdx1200 calibrated with soundcard against WWV 2.5, 5, 10, 15, 20 MHz. Error linear in frequency, R^2 = .99. Used interpolation.
Soapbox: Missed the keydown on 20 meters due to transcription error by AD8Y, got a few seconds of closing call.
Had a crowd of engineering and physics students plus prospective undergraduates watching and learning the process. Most of the hands-on by KB1QHX; accounting by AD8Y. Errors are likely from the accounting! This is the club's first attempt at this, will do it as a classroom exercise before the next one then have a more systematic error accounting system. |
| W8XN | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,169.70
-0.03 | 7,064,257.22
0.16 | 14,121,963.72
0.38 |
| Method: RFSpace NetSDR+ locked to a Trimble Thunderbolt, Pixel magnetic loop antenna, I/Q data analysis done in GNU Octave.
Soapbox: Signals were S9 on all three bands. The April FMT is trickier for me as the skip point from K5CM is in the gray region -- the F layer isn't yet settled into its nighttime retreat as it is in November. So the Doppler shifts make for some real judgement calls. In particular, the 7 MHz signal was all over the map. Thanks, Connie, for another interesting FMT, and thanks to Bruce for handling the data. |
| W9GR | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.48
-0.25 | 7,064,256.85
-0.21 | 14,121,963.09
-0.25 |
| Method: FlexRadio 6500 locked to Trimble GPS. Stereo WAV file made on Denon SD card recorder with 2 kHz reference tone on second channel (to calibrate out Denon sampling rate error) from HP3325A also locked to GPS. SOX software resamples 44.1 kHz WAV file to 8 kHz to speed up subsequent analysis. I use my own GNU Octave code to filter, detect, and weight frequency measurements from WAV file.
Soapbox: Good signal on 20 meters with very little QSB. More QSB on 40 and a lot more on 80. Again I measured frequency during the CW call-up period. My Octave code mutes measurement on key-up. The delta values I measured from the 2 minute test were -0.04 Hz on 80M, +0.02 Hz on 40M, and -0.08 Hz on 20M. It's encouraging that the CW call-up measurements were close to the 2 minute key-down values. The reported values are from the 2 minute signals, not the call-up. Many thanks to K5CM for running the test. |
| W9INE | CO | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,169.68
-0.05 | 7,064,256.81
-0.25 | 14,121,963.45
0.11 |
| Method: FLEX 6700
Soapbox: 80 MTR signal -105 dBm with S/N 49 dB and QSB 23 dB pk-to-pk.
40 MTR signal -92 dBm with S/N 50 dB and QSB 7 dB pk-to-pk.
20 MTR signal -105 dBm with S/N 27 dB and QSB 19 dB pk-to-pk. |
| W9ZB | IN | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,170.10
0.37 | 7,064,257.50
0.44 | 14,121,965.90
2.56 |
| Method: Hustler vertical, Icom receiver, CW mode, sidetone compared to DDS generated tone on DSO138 scope
Soapbox: Signal on 14 MHz very weak here in EM69xp, signals on the other two bands very strong. |
| WA1ABI | RI | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.73
0.00 | 7,064,257.19
0.13 | 14,121,963.45
0.11 |
| Method: WJ-8718 receiver locked to Rb standard, BFO beat note measured with DL4YHF's Spectrum Lab software.
Soapbox: Good signals on all bands. Doppler on 20m was quite unusual. Thanks Connie for another well run FMT and thanks Bruce for managing the data. |
| WA2DVU | NJ | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,169.40
-0.33 | 7,064,257.08
0.02 | 14,121,963.39
0.05 |
| |
| WA2IKL | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.70
-0.03 | 7,064,963.10
706.04 | 14,121,963.26
-0.08 |
| Method: HP 89441 Vector Signal Analyzer with GPS standard
Soapbox: Good signals on all 3 bands. |
| WA2USJ | NY | W2 | | | 80m | 40m | 20m | | K5CM | 3,598,624.67
454.94 | 7,064,707.68
450.62 | 14,121,986.77
23.43 |
| Method: Kenwood TS-570S xcvr.
Soapbox: K5CM tnx fer all your work. Signals Q3-5 to East coast
73 WA2USJ |
| WA4FJC | VA | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.40
-0.33 | 7,064,256.90
-0.16 | 14,121,963.40
0.06 |
| Method: Thunderbolt GPS 10 Mhz standard, HP 3586B SLM, Spectrum Lab for tuning indicator.
Soapbox: Tnx again Connie |
| WA6VPJ | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,170.23
0.50 | 7,064,257.16
0.10 | 14,121,972.61
9.27 |
| Method: Ten-Tec Omni VII calibrated using WSJT-X
Sound card calibrated using MMSSTV
Read audio frequencies with WSPR and applied to dial reading
Soapbox: New method, so unsure of the results, but hope it worked.
Good signals all around. |
| WA7BNM | CA | W6 | | | 80m | 40m | 20m | | K5CM | 3,598,169.17
-0.56 | 7,064,257.23
0.17 | 14,121,962.67
-0.67 |
| Method: Rig: Elecraft K3/P3 Antenna: SteppIR DB-36 GPSDO: TrueTime XL-DC Ref Generator: HP-3336C Software: Spectrum Lab Vers. 2.92
Measured signal and reference sequentially during the FMT. Set up SL with a 10 Hz measurement window prior to the FMT. Used the call-up period to tune the signal so that it was roughly centered in the measurement window and then adjusted the reference signal to also be within the window.
Did not attempt to correct for doppler shift.
Soapbox: Signal: 20m - S9, 40m - S9+15, 80m - S7
Thanks to Connie, K5CM, for hosting this FMT. Also, much thanks to my wife for agreeing to postpone our anniversary dinner for a day so I could participate. |
| WA7IRW | NV | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.47
-0.26 | 7,064,256.68
-0.38 | 14,121,963.22
-0.12 |
| Method: KX3 Receiver with QRP Labs VFO/SigGen locked to Rb 10 MHz reference. Spectrum Lab FFT s/w. Measured frequency difference between unknown signal and SigGen frequency.
Soapbox: Good signals tonight on all bands. Thanks to Connie and crew for setting up the test. I must remember to triple-check I've got RX on USB; may have screwed up 80m freq. by about 41 Hz. I need to find how SigGen is leaking into RX; my variable atten. does nothing and leakage starts to overwhelm unknown signal when I move SigGen near the freq. |
| WA9VNJ | WI | W9 | | | 80m | 40m | 20m | | K5CM | 3,598,169.73
0.00 | 7,064,257.08
0.02 | 14,121,963.54
0.20 |
| Method: Yaesu FT-857D with its oscillator locked to a Trimble Thunderbolt GPS and feeding Spectrum Lab doing both long and short FFTs. TBolt-locked Rigol DG1022Z waveform generator used to determine radio DDS error and sample rate error for compensation. Audio also fed to a software PLL and other custom Octave script. Separately, radio audio and a reference signal recorded in stereo with a Behringer UCA202, with ref. used to correct for audio sample rate error after analysis by Spectrum Lab.
Soapbox: Signals on 40 and 80 were S9 but 20m was barely audible in the noise at S0. Antenna is an RF-PRO-1B shielded magnetic loop one-foot off the ground, 100 feet from the house. Connie, tnx much for doing the test. |
| WB0LXZ | KS | W0 | | | 80m | 40m | 20m | | K5CM | 3,598,169.76
0.03 | 7,064,258.45
1.39 | 14,121,963.59
0.25 |
| Method: HP3586B, Spectrum Lab, 3 wire dipoles.
Soapbox: Thanks K5CM and ARRL. Digital signals were near, but not interfering with Connie's 5x9 signals. |
| WB0OEW | AZ | W7 | | | 80m | 40m | 20m | | K5CM | 3,598,169.75
0.02 | 7,064,257.15
0.09 | 14,121,963.37
0.03 |
| Method: Auduino + DDS + GPS + SpectrumLab
Soapbox: Many thanks. |
| WB4SON | RI | W1 | | | 80m | 40m | 20m | | K5CM | 3,598,169.72
-0.01 | 7,064,257.23
0.17 | 14,121,963.44
0.10 |
| Method: HP3335A Generator slaved to a Rb standard in a Fluke PM6685R injected about 300 Hz below the the unknown into a K3s/P3 in AM mode. Resulting audio tone was analyzed with DL4YHF's Spectrum Labs. Weak FMT-foo skill and pixie dust influenced analyzed tone was added to Generator freq to yield the Measured Frequency.
Soapbox: This is my first FMT, and I'm very grateful to Connie for running it, the ARRL for sponsoring it, and for John WA1ABI infecting me with FMT-fever and showing me the beauty of our unpredictable ionosphere at the millihertz level.
Connie's Signals were excellent into RI: -75 dBm on 80, -81 dBm on 40, and -74 dBm on 20. I had at between 38 and 56 dB over noise to play with.
The 80 meter signal had a prominent "straight line" signal in an almost ideal sawtooth pattern. I'm hoping that leads to a good result. The 40 meter signal wasn't quite as clear with another possible freq about 40 mHz higher than I submitted. The 20 meter signal to my novice eyes had little to go and I might have picked a value about 60 mHz higher, but it only showed up during the sign-off.
You FMT-nuts are true Wizards! 73, Bob, WB4SON |
| WB6KDH | CA | W6 | | | 80m | 40m | 20m | | K5CM | | 7,064,256.96
-0.10 | 14,121,262.00
-701.34 |
| Method: GPSDO locked Siglent SDG-1000X AWG. ICOM IC-756PRO III in CW. Spectrum Lab beat analysis. Antenna is ground mounted Hustler 5BTV.
Soapbox: First year attempt. Fumbled the ball on 20M test, so thought my signal generator might have been set < 1Hz at the time, so SWAG (well, unssienctific WAG). For 40 M, I used the CW BFO and used the relative resulting tone to calculate the median for both the reference frequency and the FMT frequency.
No copy (or spaced out) on 80M.
Lots of fun and a good tryout for the new GPSDO and Siglent.
Also in the signal path is a modified Fluke 7220 frequency counter, which is now upgraded to use an internal OCXO. I designed an adapter board for a Trimble OCXO (coincidentally, the same as the GPSDO uses) so that is mounts in the factory position. It's calibrated to the GPSDO by measuring the phase shift over time on an oscilloscope. I just let it run standalone – oven on 24/7 (as is the GPSDO).
Looking forward to the next FMT in November! Thanks to all involved with running the FMT, too. |
| WB8REI | OH | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,150.47
-19.26 | 7,064,248.35
-8.71 | 14,121,974.87
11.53 |
| |
| WB8TFV | WV | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,169.72
-0.01 | 7,064,256.88
-0.18 | 14,121,963.44
0.10 |
| Method: Icom 756PROII, USB sound card,Spectrum Lab, FMT by K1JT. Wavetek 3002 Sig Gen locked to Trimble GPS.
Ant: 1960/70 SWANN 80/40 Doublet at 30'.
Soapbox: I had multiple problems:I got a late start. A windows update reassigned all my audio port numbers. The names were correct but the numbers were off by 1 this caused me to monitor the wrong signal for a while. About 5-10 seconds into the 20 meter key down my computer locked up and I had to reboot. Had high noise on 40 meters. Still Fun! |
| WD4IYE | KY | W4 | | | 80m | 40m | 20m | | K5CM | 3,598,169.56
-0.17 | 7,064,257.18
0.12 | 14,121,963.47
0.13 |
| Method: IC-718 controlled by Flrig and Fldigi.Calibrated sound card and warmed equipment for 2-3 days. Monitored 5 WWV/CHU frequencies to find most stable reference by looking at error average,error max and error min. Take the stable frequencies and calculate error per hertz. Calculate hertz difference between reference frequency and key down frequency. Then add or subtract error per hertz to key down frequency. This seems to get be close with a shoe string budget. Constantly improving my spreadsheet so its lots of fun. I feel OK with by 80 and 40 meter results because most FMts are within 100-300 hertz of call up frequency. But I lost track of time and rushed my 20 meter checks and its 900 hertz off of call up. I usually record everything to find my mistakes but I didn't this time. :( So I think 20 meters is off a mile. And if it is I'll just look forward to November! Thanks to Connie for his time and equipment. All signals were very strong. I was surprised I received the 20 meter signal because the band has been so bad.
Soapbox: Thanks to Connie for his time and equipment. |
| WQ8T | MI | W8 | | | 80m | 40m | 20m | | K5CM | 3,598,169.73
-0.00 | 7,064,257.08
0.02 | |
| Method: FT-1000MP MRK-V receiver, Fluke 6070A signal generator with GPSDO reference oscillator, Spectrum Lab for audio analysis |
