Results - November 8, 2024 FMT
| Actual Radio Frequencies (Hz): | ||
| 80m | 40m | |
| W8RKO | 3,597,487.10 | 7,064,321.70 |
| K5CM | 3,599,122.97 | 7,065,343.13 |
W8RKO,K5CM All (<=1.0 Hz):
AA6LK, AC9LV, AD7G, AF9A, AJ4YA, AJ5P, GW4BVE, K5CM, K5ND, KA5QEP, KB3HF, KB4XR, KD2BD, KD5FX, KD8RV, KE6ZLX, KJ6HYC, KN1H, N3FG, N5IY, N5TNL, N7WS, N8LR, N8OBJ, N9BPL, VE2IQ, VE3GSO, VE3YX, W1HB, W1QG, W2FD, W2TX, W5SSV, W6OQI, W7SUA, W8WTS, W9GAJ, W9GR, W9INE, WA5FRF, WA9VEZ, WO7V, WQ8T
W8RKO 80 (<=1.0 Hz):
AA6LK, AC9LV, AD5MT, AD7G, AF9A, AJ4YA, AJ5P, GW4BVE, K0WM, K4CXX, K5CM, K5ND, KA5QEP, KA8BRK, KA9SVR, KB3HF, KB4XR, KD2BD, KD5FX, KD5MMM, KD8RV, KE6ZLX, KJ6HYC, KN1H, KV5W, N0PFE, N2QLQ, N3FG, N5IY, N5TNL, N7QXB, N7WS, N8LR, N8OBJ, N9BPL, SP5LST, VE2IQ, VE3GSO, VE3YX, W1HB, W1QG, W2FD, W2TX, W3FAY, W4EDX, W5SSV, W6OQI, W7SUA, W8WTS, W9GAJ, W9GR, W9INE, W9ZB, WA4FJC, WA5FRF, WA7BNM, WA9VEZ, WO7V, WQ8T
W8RKO 80 (>1 to <=5 Hz):
K0MZ, KB2HSH, KC3VNB
W8RKO 80 (>5 to <=10 Hz):
(none)
W8RKO 40 (<=1.0 Hz):
AA6LK, AC9LV, AD7G, AF9A, AJ4YA, AJ5P, GW4BVE, K0MZ, K5CM, K5ND, KA5QEP, KA8BRK, KB3HF, KB4XR, KD2BD, KD5FX, KD8RV, KE6ZLX, KJ6HYC, KK4KAZ, KN1H, N0PFE, N3FG, N5IY, N5KAE, N5TNL, N7WS, N8LR, N8OBJ, N9BPL, N9DK, VE2IQ, VE3GSO, VE3YX, W1HB, W1QG, W2FD, W2TX, W3FAY, W5SSV, W6OQI, W7SUA, W8WTS, W9GAJ, W9GR, W9INE, W9ZB, WA5FRF, WA7BNM, WA9VEZ, WO7V, WQ8T
W8RKO 40 (>1 to <=5 Hz):
K0WM, KB2HSH, KC3VNB, N2QLQ, N7QXB, SP5LST, W8EDU, WA7X
W8RKO 40 (>5 to <=10 Hz):
KD5MMM
K5CM 80 (<=1.0 Hz):
AA6LK, AC9LV, AD5MT, AD7G, AF9A, AJ4YA, AJ5P, GW4BVE, K0MZ, K0WM, K5CM, K5ND, K7NG, KA5QEP, KB3HF, KB4XR, KC3VNB, KD2BD, KD5FX, KD8RV, KE6ZLX, KJ6HYC, KK4KAZ, KN1H, KV5W, N0PFE, N2QLQ, N3FG, N5IY, N5KAE, N5TNL, N7QXB, N7WS, N8LR, N8OBJ, N9BPL, N9DK, VE2IQ, VE3GSO, VE3YX, W1HB, W1QG, W2FD, W2TX, W3FAY, W4EDX, W5SSV, W6OQI, W7SUA, W8WTS, W9GAJ, W9GR, W9INE, W9ZB, WA2DVU, WA4FJC, WA5FRF, WA7BNM, WA7X, WA9VEZ, WO7V, WQ8T
K5CM 80 (>1 to <=5 Hz):
KA9SVR, KB2HSH, SP5LST, W8EDU
K5CM 80 (>5 to <=10 Hz):
KE8DO, W8GNM
K5CM 40 (<=1.0 Hz):
AA6LK, AC9LV, AD5MT, AD7G, AF9A, AJ4YA, AJ5P, GW4BVE, K0MZ, K0WM, K5CM, K5ND, K7NG, KA5QEP, KA8BRK, KB3HF, KB4XR, KD2BD, KD5FX, KD5MMM, KD8RV, KE6ZLX, KJ6HYC, KK4KAZ, KN1H, KV5W, N2QLQ, N3FG, N5IY, N5KAE, N5TNL, N7QXB, N7WS, N8LR, N8OBJ, N9BPL, N9DK, SP5LST, VE2IQ, VE3GSO, VE3YX, W1HB, W1QG, W2FD, W2TX, W5SSV, W6OQI, W7SUA, W8GNM, W8WTS, W9GAJ, W9GR, W9INE, WA2DVU, WA4FJC, WA5FRF, WA9VEZ, WO7V, WQ8T
K5CM 40 (>1 to <=5 Hz):
K4CXX, KB2HSH, W3FAY, W8EDU, W9ZB
K5CM 40 (>5 to <=10 Hz):
KC3VNB, KI4NVX, WA7X
| Entries (n=75): | ||||||||||||||
| Call Sign | QTH | Area | Grid | Method/Soapbox | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA6LK | CA | W6 | CM98kw |
|
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 driving USBserial and Prologix USB-GPIB 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 as seen on o'scope. Each run was also recorded to a .wav file through SpecLab, though this time I just used the display as a sanity check. Soapbox: Thanks Connie and Mike for running the event. 40m signals were strong but had much multipath variation. 80m signals were weak but more stable. 73, L- | |||||||||
| AC9LV | IL | W9 | EN52kh |
|
Method: FTDX 101MP front end, tapped, fed into SDR PLAY RSP2 Soapbox: Unsure of frequency calibration due to sub optimal propagation/noise on WWV. Thanks Connie and Michael for another fun evening. Made the GREEN Leader board last two times, hoping for third !! 73 | |||||||||
| AD5MT | CA | W6 | DM14ka |
|
Method: Anan G2 w/GPS. WSJT-X Soapbox: Not sure I adjusted my offsets correctly. Could not get a clean signal from W8RKO on 40M. | |||||||||
| AD7G | CA | W6 | DM13bu |
|
Method: Used FTDX3000, GPSDO, and a Freq. Counter. Soapbox: Spent more time to get things right hopefully, I always learn more things abt FMT. Thanks to Connie, mike and the FMT team for putting on this event. | |||||||||
| AF9A | IN | W9 | EM69wv |
|
Method: Mercury SDR receiver, WSJT-X, 10 MHz TCXO cal to WWV, CHU. Soapbox: Good signals, 20 - 40 dB above the noise except some QSB on W8RKO's 80m signal. Thanks again guys! | |||||||||
| AJ4YA | NC | W4 | FM05st |
|
Method: K3s and Fan Dipole antenna. The K3s has a SPOT feature, and I listen for the "beat", then record the dial reading. I adjust the dial reading with statistics from a spreadsheet program. Soapbox: My 80 meter antenna came down during a summer-storm so I used the 40M dipole for both stations. The 80M tests were both of adequate strength to complete those tests. I look forward to this test each April and November. Thank you. | |||||||||
| AJ5P | MS | W5 | EM51kr |
|
Method: Icom 705, Fl-digi, dipole Soapbox: Good signals although W8RKO was weak/QSB on 80. Had problems getting Fl-digi to lock on the frequencies this time, unusual. Just hope for the best. | |||||||||
| GW4BVE | DX | DX | IO82kq |
|
Method: SDRplay RSPdx SDR locked to GPS with RFzero operating as GPSDO. Spectrum Lab running on PC to measure audio frequency. Calibration using another RFzero as reference on 10MHz. Soapbox: Good strong signals from both stations on 7MHz but much weaker on 3.5MHz. I had a calibration a problem for unknown reason. The calibration was different when tested before and after the tests despite being stable for many hours before the test. Could be operator error due to being in the early hours of the morning in the UK!! Thanks to both stations for another fun FMT. | |||||||||
| K0MZ | CA | W6 | DM03ts |
|
Method: TR-7 receiver with BFO on, local oscillator into Heath IM-4100 counter clocked with HP-10544A OCXO. Matched pitches by ear. Calibrated HP 10544A to WWV 10 MHz at noon today. Soapbox: Signal levels: W8RKO 40M, S-9 with deep fades, 80M, signal at noise level. K5CM 40M,S-8 with fades, 80M, S-8 with shallow fades. I didn’t notice any doppler. A big thank-you goes to Mike and Connie for transmitting these FMT exercises. They are always fun to prepare for and participating in. | |||||||||
| K0WM | CO | W0 | DM79jt |
|
Method: Set up is mostly old school; I stick with it because it’s paid for: Yaesu FT-1000MP Mark V, Rockwell/Collins 180S-1 tuner, 40-meter dipole, Fluke 8845A as an audio frequency meter. Calibrate the receiver with a Bodnar GPSDO. I have used my homebrew Excel spreadsheet to analyze several FMTs, with varying degrees of success. :-) Soapbox: The major unknown is the effect of Doppler shift. This effect is important; it is apparent most recently in the April 2024 FMT results. It is possible to get Dopplered right out of the green box. The 40- and 80-meter signals were excellent. Very low frequency and amplitude variation on K5CM’s 40-meter signal. Thanks to Connie and Mike for continuing support for this interesting event. The FMT makes radio fun! | |||||||||
| K4CXX | FL | W4 | EL98pd |
|
Method: Used synthesized receiver to measure both test frequency and standard frequency stations offset tones into a smart phone. Played back transferred audio files from desktop into a counter, and used period measurements to reduce effect of static and noise, and math to derive frequenckes and to remove recognizable errors. Soapbox: Signals were consistently good with fading on only last 80 m test. This approach is shakey, but resourceful for last minute circumstances. Fingers are crossed for the results. Thanks again to K5CM and W8RKO for their support. | |||||||||
| K5CM | OK | W5 | EM25ir |
|
Method: TX: HP Z3801 GPS frequency standard, HP-3336b. A 10 db transistor amp follows and drives a 12by7 / pair 6146. Then to the final amplifier (8877) running 800 watts out. There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the GPS frequency source. RX: K3 in AM mode with low side injection from a GPS locked HP-3336B. Audio is feed to Spectrum lab. Soapbox: Mike had a good signal on both bands. Very little apparent Doppler. | |||||||||
| K5ND | TX | W5 | EM12kv |
|
Method: IC-746PRO with CR-388 high stability oscillator. Cushcraft MA6V vertical antenna. Warmed up for two days. WSJT-X frequency calibrated two hours before the test. Measured with WSJT-X. Soapbox: Solid signals from all four transmissions. | |||||||||
| K7NG | OR | W7 | CN73ui |
|
Method: IC-7610 w/ GPSDO reference --- 43' vertical --- FLDIGI Soapbox: Well DANG! I bumped the VFO knob during the W8RKO 40M test, and I have no data for that. Both W8RKO and K5CM 80M sigs right at the noise floor at best. K5CM on 40M was clear if not strong. | |||||||||
| K9JM | CA | W6 | CM99lc |
|
Method: K3s calibrated and tuning forks Soapbox: This was a quick test... very little prep to double check if things were working. Good sigs on 40m >25dB S/N 80m: RKO & CM 15dB S/N with QSB | |||||||||
| KA5QEP | OK | W5 | EM15ni |
|
Method: Receiver ICOM R9500, audio was recorded and analyzed with Mathematica software. Soapbox: All signals were received well. Great conditions. Some doppler on 40 M k5cm's signal. Thanks guys. | |||||||||
| KA8BRK | OH | W8 | EN81fc |
|
Method: Ic-706MKII, 80 meter inverted vee, Bodnar mini gpsdo, fldigi Soapbox: Good strong signals for all four runs. Had some strange results with fldigi on 1st run. No attempt to correct for Doppler. Overall, not very confident in my results. Thanks to W8RKO and K5CM. | |||||||||
| KA9SVR | IN | W9 | EN61gn |
|
Method: Icom IC-735 with end fed random wire antenna using WSPR FMT for measurement. Soapbox: A fair amount of noise on 80M but both signals were usable. I had fun, thanks to Connie and Mike. | |||||||||
| KB2HSH | NY | W2 | FN03na |
|
Method: Xiegu G90 connected to AN-131-A manpack antenna. Measurements taken using fldigi 4.2.06 Soapbox: This is the first FMT that I've done in a while. Conditions on Thursday evening were excellent...both stations were 579 easily. Thank you K5CM and W8RKO for your effort... John KB2HSH | |||||||||
| KB3HF | MO | W0 | EM48qt |
|
Method: TS-890, dipole & vertical antennas, WSPR software Soapbox: Good signals on all tests in MO. Thanks for the fun. | |||||||||
| KB4XR | VA | W4 | FM18hw |
|
Method: ICOM 725 fitted with TCXO, FLDIGI FMT, Bodnar GPSDO for ref, spectral analysis of audio recording using Scilab tools. Attic G5RV. Soapbox: Thank you K5CM & W8RKO. Third time and still learning. K5CM fading on 80 meters. W8RKO on 80m below 3598 may have messed me up. Still getting discrepancies FLDIGI & Spectral analysis - going with audio SA. Trying to compensate for sample rate errors this time - hopefully going in the right direction! | |||||||||
| KC3VNB | PA | W3 | FN00dl |
|
Method: ICOM-7300, powered on for 12 hours, Leo Bodnar single output GPSDO, powered on for 24 hours. FLDIGI used in FMT mode; GPSDO output set 1kHz above expected freq, 7300 set 1kHz below expected freq. WWV 5MHz was measured before and after test to assess doppler shift - was negligible and no correction added. Values reported are averages from the one minute of test tone. Soapbox: Learned that FLDIGI has a bug if used in CW mode (e.g. if you decode the test prologue) and then switched to FMT mode - makes for corrupted log files. Signals from both sources appeared on my end to have far more drift during the test than the prior test in April 2024. Many thanks to W8RKO and K5CM for conducting this test. 73 | |||||||||
| KD2BD | NJ | W2 | FN20xd |
|
Method: All homebrew equipment including a carrier phase tracking receiver, a WWVB referenced frequency standard, an electrically small vertically polarized loop antenna, and a frequency counter. Method involved phase locking the receiver's DDS 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: https://www.qsl.net/kd2bd/fmt-methodology.html Soapbox: The Kp-index was around 1.5, and this stable indicator was evident in the quality of the signals received. W8RKO had an exceptionally strong and stable signal on 40, except at the very end when the frequency suddenly dropped by almost 1 Hz. Signals from K5CM (longer path) were generally weaker and more turbulent, but Connie's 80M transmission was pretty solid during the keydown period. | |||||||||
| KD5FX | OK | W5 | EM16lr |
|
Method: New FLEXRADIO 8600 that just arrived with GNSS and FLDIGI s/w Soapbox: W8RKO was 20 over S9 on 40 and on 80 too. K5CM was 20-30 over on 40 and 30-40 over on 80. Some lightning in the area but nothing close. | |||||||||
| KD5MMM | TX | W5 | EL19ds |
|
Method: FT847, signalink, Speclab, spreadsheet, CHU for reference. Soapbox: Strong signals on all runs here, hope I'm close. 73 all .. | |||||||||
| KD7KDO | AZ | W7 | DM33xm |
|
Method: IC7300/FLDIGI Soapbox: Unable to hear CW signals on 80 meters (-41 db) 40 meters good -11 to -13 dB signals whereas at 6PM I heard CW signals tuning up just fine ... on the 80m band!! Go MARCA - Motorola Amateur Radio Club of Arizona!!!! | |||||||||
| KD8RV | MI | W8 | EN82mj |
|
Method: Wellbrook ALA 1530 high gain active mag loop into a GPSDO'd RSPdx SDR. Find and rough spot call up and key down freqs with a GPSDO'd Elecraft K3 (for sanity check). Record a key down SDR I/Q file. Note CHU 7 MHz and 3 MHz doppler shifts on a second GPSDO'd RSPdx during keydowns. Examine recorded files utilizing SDR Uno playback with Synchronous AM function in DSB mode. Add offset. Subtract CHU doppler offset. Soapbox: Really nice signals this go round! Noted a huge change in doppler on the CHU 7 MHz signal when it came time for K5CM's 40 meter keydown here at my QTH in Michigan. If that shift was likewise affecting K5CM's signal, I'm good. If it didn't, then I'm significantly off with the K5CM 40 meter measurement. Otherwise, lots of fun! Thanks to all for the effort and time to make this happen. 73, Greg KD8RV | |||||||||
| KE6ZLX | CA | W6 | DM13ie |
|
Method: Nooelec NESDR smart, Ham it up converter v1.0(0.5 ppm TCXO upgrade), Distill am bandstop filter. Mega loop ant MLA-30. GQRX and Fldigi FMT on a linux box. U-BLOX LEA-M8T-0-10 Huawei GPS module controlled by PyGPSClient in fixed mode providing reference freqs. (UNK freq - REF freq) + REF freq. Results plotted and outliers removed. Evaluated frequency vs amplitude as well as mean of frequency values, came to a conclusion considering those two sets of data. Soapbox: 40 meter signals strong into San Diego. K5CM 80 meter signal was on the weak side. W8RKO 80 meter signal barely measurable. Thank you K5CM and W8RKO for all your work on this FMT. | |||||||||
| KE8DO | IN | W9 | EM68ug |
|
Method: IC-7300 iPad Sonic Tools SA app to measure audio frequency WWV 15 MHz reference no GPS used Soapbox: FMT signals were good and strong, did not get a stable reading from WWV Need to find my GPS frequency standard for next time, packed away from moving. | |||||||||
| KI4NVX | FL | W4 | EL96bn |
|
Method: Elecraft K2 (first time on in 4 years), Leo Bodnar GPS Ref, ground mount 1/4 wave vertical (MC-750) set to 40M length with coil, FLDIGI 4.2.04 Soapbox: Love the FMT tests. Good sigs on 40M for both though K5CM was fading a lot at my QTH. Std Deviation much higher for W8RKO. Much fading on 80M for both with very weak sig from K5CM. Actually suprised I was able to copy 80M sigs at all through significant noise. | |||||||||
| KJ6HYC | NC | W4 | FM15mk |
|
Method: The IC-7610 was temperature-stabilized for 24 hours and calibrated to WWV at 5 & 10 MHz, one hour before the Frequency Measuring Test (FMT). A magnifying glass was utilized to fine-tune the radio. Soapbox: (none) | |||||||||
| KK4KAZ | FL | W4 | EL88qn |
|
Method: (none) Soapbox: Test #3 - Heard ZERO signal near 3598 kHz. | |||||||||
| KN1H | NH | W1 | FN33sg |
|
Method: IC-7300 and a SE facing EWE, audio out to Computer with Spectrum lab. Soapbox: Thanks Connie and Michael for another fun FMT. Both stations on both bands were 599+ with no QRM or noticeable QSB. Doppler shift seemed slight. Unfortunately my equipment didn't get the warm-up it needed to settle down so I had to apply some luck and guesswork. | |||||||||
| KV5W | TX | W5 | EM22ih |
|
Method: IC-7300, Leo Bodnar GPSDO, FLDigi. Generated Ref 500Hz above call up freq. Soapbox: Good signals from W8RKO and K5CM. I fiddled around too long and missed W8RKO on 40m. I have no confidence in my technique or measurements. I've always wanted to participate but every time I looked into it, the event had already passed, so I never really dug in to how to perform the measurements. My results are likely way off. I look forward to learning more and attempting the next FMT. | |||||||||
| N0PFE | TX | W5 | EM00ul |
|
Method: Equipment: Elecraft K3, AV640 used on 80 meters not very well. Zero beat WWV on 5MHz and 2.5MHz then zero beat and examine Spectrum Lab frequency response. I did let the radio sit for several housrs to get it stable. Soapbox: I opted for the tried and true ear to zero beat method. Worked well in the past, anyway. Both bands seemed fairly stable. 80 meters was quieter than usual for me. Fade was slightly greater on 80m with K5CM. This year I could hear both on both bands just fine although K5CM's signals signals were very attenuated due to me using a 40m vertical on 80 meters. (Still, no 80m antenna). Static seemed minimal. These events are quite fun. | |||||||||
| N2QLQ | FL | W4 | EL96wm |
|
Method: FTDX10, FLdigi, Attic dipole and Rain Gutter antennas Soapbox: The first time I heard all 4 transmissions, but the ones on 80 meters were just above the noise. | |||||||||
| N3FG | PA | W3 | FM29hw |
|
Method: K3, Spectran, CHU Soapbox: W8RKO strong on both bands. K5CM good on 40M and a bit weak and noisy on 80M. As usual, many tnx to both stations for another great event. 73 Frank, N3FG | |||||||||
| N5IY | OH | W8 | EM79xq |
|
Method: WSJT-X with cal freqs = {2.5, 3.3 , 5, 10 } MHz Soapbox: Thanks to W8RKO,K5CM, the ARRL, K1JT and the crew of contributors to WSJT-X. | |||||||||
| N5KAE | TX | W5 | EL29gb |
|
Method: WSJT-X, IC-746PRO, 80 Meter inverted vee. Average of all good data points. Soapbox: Thanks to you fellows for doing this. It always helps my brain!!! | |||||||||
| N5TNL | AR | W5 | EM25ui |
|
Method: RX-888 SDR clocked by 10 MHz Trimble Thunderbolt GPSDO. ka9q-radio recordings post-processed using SDR Console, Audacity, and fldigi. Trying to use CHU and WWV for Doppler estimates this time. Soapbox: Lots of fun. Big thanks to K5CM and W8RKO. | |||||||||
| N7QXB | UT | W7 | DN40cq |
|
Method: Elecraft K4D, Leo Bodnar GPSDO, WWV, and Spectran software Soapbox: Thanks to W8RKO and K5CM for hosting the FMT. | |||||||||
| N7WS | AZ | W7 | DM42jh |
|
Method: Method: Bodnar GPSDO through stepped attenuator to directional coupler to SDR-IQ RX input. Bodnar set to ~600 Hz below received signal. Record AM demodulated spectrum via SpectraVue S/W for later analysis. Extract keydown portion of audio with Audacity S/W. Analyze with Spectrum Lab S/W. Soapbox: On the W8RKO 40-meter measurement I had awful QRM from a CW station on a lower frequency and a digital station above. I had to do some post processing filtering to extract the test signal. In subsequent measurements I narrowed the RX BW before recording. Doppler was an issue on each signal (>1 Hz). Results will be a test of my eyeball averaging. | |||||||||
| N8LR | MI | W8 | EN83ak |
|
Method: FLDIGI on laptop, TS590SG transceiver with the TCXO by Mark, W7MLG, inverted vee antenna. I let the rig warm up for about six hours. I did a calibration run at 0217Z to estimate the needed corrections for 80m and 40m, made the four measurements, and then immediately did another calibration run. I used WWV at 2.5MHz and 5.0MHz and CHU at 3.33MHz and 7.85MHz. My Excel spreadsheets did most of the computational work. Not sure what happened with FLDIGI's data recording, but the csv files were seriously corrupted and it took me hours to extract usable data. Signals were good: Mike's 40m sig at S9+20, Connie's 40m sig at S9+10, Mike's 80m sig at S9+10, and Connie's 80m sig at S9. Soapbox: Thanks Mike and Connie! | |||||||||
| N8OBJ | OH | W8 | EN91fh |
|
Method: FLEX-6500, HP Z3801A GPSDO, GAP Titan (and 80M OCF dipole for W8RKO 40M) FLDigi V4.1.18 Soapbox: Out of soap today... | |||||||||
| N9BPL | FL | W4 | EL96wi |
|
Method: RSP Duo with Leo Bodnar reference. Soapbox: K5CM on 80m was very weak at my QTH. Hopefully I had enough signal to noise to pull this one out. | |||||||||
| N9DK | CA | W6 | CM87wj |
|
Method: KX3, Endfed at 30', gpsdo (leo bodnar) for reference, fldigi Soapbox: Arg - forgot to start recording data for W8RKO on 80m so I have nothing. Also had trouble making out K5CM on 80m so not sure I got the key-down portion or what exactly. I feel good about the 40m although I'm always a little unsure about the GPSDO compensation calculation. Once I see my results I'll need to document this! | |||||||||
| SP5LST | DX | DX | KO02md |
|
Method: Kenwood TS-890S, GPSDO, SpectrumLab Soapbox: Thank you so much! | |||||||||
| VE2IQ | ON | VE | FN15nt |
|
Method: E-probe > TS850 (CW narrow) > FFT. 10 MHz OCXO reference calibrated overnight per GPS. Sound card samplerate calibrated by 10 kHz pilot tone. No Doppler corrections applied. Soapbox: Tnx to ARRL and Tx stns for another good one. All sigs S9+ and 5-min callup nice. Did not see much (any?) freq shift between callup and keydown. Still scratching my old head for a way to nail down the Doppler shifts. Helpful timing for this FMT nearly same as Nov 2023. | |||||||||
| VE3GSO | ON | VE | EN92ix |
|
Method: Receiver in AM mode, 1kHz bandwidth centered on expected. Bodnar GPSDO tuned 400~500Hz low, Spectrum Lab measuring the audio beat. Soapbox: Great conditions, moderate noise, strong S9+ signals. Thanks both! | |||||||||
| VE3YX | ON | VE | FN16fd |
|
Method: I used FLdigi in FMT mode with a TS-2000 and a Marconi 2019 GPSDO stabilized sig gen. I made no attempt to correct for Doppler. Soapbox: The 40 m signals were very strong; S9 + 10 to 20. The 80 m signals were more like S9; still very good. Thanks again Mike and Connie. | |||||||||
| W0HBK | IA | W0 | EN42da |
|
Method: FT-920 TCXO Direct dial measurement. Soapbox: Great signals...all 59+. TNX for conducting test again! | |||||||||
| W1HB | VA | W4 | FM18ku |
|
Method: (none) Soapbox: Thanks Connie and Mike. Good signals here. | |||||||||
| W1QG | CA | W6 | CM87xg |
|
Method: Z3801a GPSDO & HP 3586b Selective Level Meter RX RX audio digitized with PC and processed by custom MATLAB/Simulink code. Soapbox: The key-down minute seems like a few seconds. Time flies when your having fun. | |||||||||
| W2FD | PA | W3 | EN91wx |
|
Method: IC-7100 /audio generator/oscilloscope/frequency counter/Measure near 600 Hz. IC-7100 audio output for CW/RCW mode. Audio generator used to synch sweep of oscilloscope and the frequency counter used to measure audio frequency to 0.01 Hz precision. System Calibration from WWV 25 MHz. signal. Soapbox: Thanks, Mike and Connie. Noise fairly low on both bands. Signal strength was generally strong from Ohio and Oklahoma--but with QSB. Signals were S9 to S9 + 15-20 dB. | |||||||||
| W2TX | GA | W4 | EM74se |
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Method: KWM-380() with homebrew Reference and Synthesizer assemblies. A soundcard and Spectrum Lab SW measures the audio frequency. A homebrew GPSDO produces a 10 MHz reference to which ALL oscillators are locked. The audio frequency and the dial frequency are combined for the exact frequency. Soapbox: A lot of Doppler on both of K5CM's signals here in north Georgia. W8RKO's 80M signal was exceptionally strong and steady. | |||||||||
| W3FAY | MD | W3 | FM18ox |
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Method: Kenwood TS-890S w/Leo Bodnar GPSDO reference; vertical; Spectran audio software. Toggled between CW and CW-R, adjusting VFO for same sidetone frequency reading. Soapbox: No problem copying all signals. Kept it simple this time. As always thank you for a fun event! Denis | |||||||||
| W4EDX | NC | W4 | EM95nu |
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Method: IC-7610,Spectrum Lab. Set rcvr freq in USB so resulting tone was close to 600 Hz and then measured tone and added to rcvr displayed freq. Soapbox: K5CM and W8RKO were both 599+ here in NC and tnx to both for providing the signals for FMT measurements. | |||||||||
| W5SSV | TX | W5 | EL39ax |
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Method: GPS disciplined HP-3586 in count mode 400 Hz BW. Fan dipole inverted V at 60 Ft. Soapbox: Another great club project with a few members experimenting with fldigi! Doppler appeared nil and low noise despite there being a hurricane in the gulf. Thanks again W8RKO and K5CM for another fun test! | |||||||||
| W6OQI | CA | W6 | DM04vf |
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Method: HP3586 Selective level meter locked to HP GPS receiver Soapbox: 40 Meter signals were strong with usual multipath. 80 Meter signals were weak with usual multipath in the Los Angeles area. | |||||||||
| W7SUA | AZ | W7 | DM34rs |
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Method: fldigi FMT modem, SIGENT sdg 2042x GPSDO, Elecraft K4D, 160 OCF Inv V. Set the GPSDO ref tone about 300 Hz below the expected unknown signal. Plotted resulting spreadsheet and trimmed beginning and end of the record. Then just submitted the result after seeing no anomalous results. Soapbox: Thanks to Mike and Connie for putting on the FMT. Quite fun and always a challenge. Next time hope to try a phased locked loop receiver to see if different results than with my frequency locked Elecraft receiver. 73 to all | |||||||||
| W8EDU | OH | W8 | EN91em |
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Method: fldigi frequency measuring software to record the data, equipment was a ICOM 7610 with a leo bodnar GPSDO. Recorded reference data from WWV at 5 MHz. Then went through and analyized the data with a custom matlab code to obtain the results. Soapbox: This submission is from the Case Western Reserve University Amateur Radio Club. Special thanks to AD9DV and AK6AW from W8EDU for performing the frequency measuring test on behalf of the club. | |||||||||
| W8GNM | OH | W8 | EN81nn |
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Method: FlexRadio 6600M is frequency locked to 10MHz. Trimble GPSDO with 1Hz dial resolution. DAX, digital audio transfer of demodulated unknown carrier tone to Spectrum Lab. USB carrier frequency set to ~100Hz below unknown frequency. Average audio frequency that was measured near 100Hz on Spectrum Lab was added to Flex dial frequency to get final measurement result. Soapbox: Some SSB QRM on 3599 test contaminated data. Lots of Doppler shifts on both 40m and 80m that made measurements difficult this time. I was not able to estimate Doppler shift from WWV signals prior to test this time, so I don't have much confidence in this pair of measurements. Both 80m and 40m signals were over S9 strength at my QTH. I was not available for W8RKO tests. | |||||||||
| W8WTS | OH | W8 | EN91jj |
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Method: Bodnar mini as reference, receiver is FT-1000MP with my design REF module that is referenced to a separate Bodnar mini. Signal processing by Fldigi 4.2.03. Soapbox: Signals were generally good on all four runs. The standard deviations of my post-processed vectors are, RKO/40: 0.052, CM/40: 0.070, RKO/80: 0.047, CM/80: 0.074. | |||||||||
| W9GAJ | IL | W9 | EN62be |
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Method: Yaesu FTDX5000MP with random wire ant. Use CW receive mode with audio peak filter on for 100 Hz bandwidth. HP 8657B referenced to HP Z3801A GPSDO, HP 34401A as audio frequency counter. Audio frequency data analyzed with spreadsheet. Use substitution method. Subtracting audio frequencies reveals tuning error and cancels a small systemic error of 0.15 Hz. Soapbox: Thanks K5CM and W8RKO! 40m signals were very good. 80m signals were weaker. K5CM had QSB on 80m. | |||||||||
| W9GR | CA | W6 | CM99mg |
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Method: GPS locked FlexRadio 6500, with DDS rounding error corrections feeds Denon digital audio recorder. GPS locked HP3325A feeds 2 kHz tone to other stereo channel, to calibrate out sampling rate error in the Denon. Resulting WAV file is analyzed with homebrew GNU Octave code with envelope (signal strength) weighting of detected frequency. Soapbox: Always great fun, thanks to K5CM and W8RKO. I have a Yaesu Quadra amplifier in line and it was right in the middle of the W8RKO 40 meter run that it decided to do its automatic relay contact cleaning. That disconnected the antenna for a few seconds. I'll have to shut off power to that amp next time so it doesn't interrupt the signals. | |||||||||
| W9INE | CO | W0 | DN70gi |
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Method: FLEX-6700 and FLDIGI in Frequency Analysis mode Soapbox: S/N was 50 dB to 60 dB (strong signals) | |||||||||
| W9ZB | IN | W9 | EM69xp |
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Method: IC706MKIIG into WSJTX FreqCal function. Checked against WWWV & CHU Soapbox: All four signals very strong here. Didn't work too hard at it this time and enjoyed it very much. Thanks guys. | |||||||||
| WA2DVU | NJ | W2 | FM29nc |
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Method: (none) Soapbox: (none) | |||||||||
| WA4FJC | VA | W4 | FM08lf |
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Method: HP SLM with Spectrum Lab 80 M dipole Soapbox: Tnx for this event. | |||||||||
| WA5FRF | TX | W5 | EL09nn |
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Method: Equipment: Icom IC-7610 with BG7TBL 2019-03-25 GPSDO. Lenovo laptop computer running Spectrum Lab audio spectrum analyzer. Method: The IC-7610 was placed in USB mode to down convert the RF signal frequency to an audio tone. The audio was ported to the laptop where the tone frequency was measured with the Spectrum Lab software. The final result was obtained by adding the audio tone frequency to the RF dial frequency on the IC-7610. Soapbox: The ionosphere appeared to be actively changing during the FMT, producing both Doppler shifts and Doppler mode splitting. Between callup and key down, K5CM was observed to monotonically lower in frequency by 0.35 Hz on 40 meters. Doppler mode splitting was observed on both 80-meter signals. The K5CM Doppler track split into three distinct modes. The W8RKO Doppler track split into two distinct modes plus a faint third. | |||||||||
| WA7BNM | CA | W6 | DM04td |
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Method: Receiver: Icom R-8600 Antenna: SteppIR DB-36 at 70 ft - used 40m setting for both bands Software: Fldigi 4.1.26 in Freq Analysis mode Used GPSDO as external frequency reference for R-8600. Averaged Fldigi measurements during most of key-down period. Soapbox: Signals in S.Calif: K5CM: 40m: S9+15, 80m: S6-7 W8RKO: 40m: S9+10, 80m: S5-6 | |||||||||
| WA7X | UT | W7 | DN40cq |
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Method: TS-2000, HP GPS disciplined oscillator HP signal genlocked, then compared using Spectran. Soapbox: While noise and QRM were non existent, both doppler and QSB were wild. Just found I had covid and had to rethink more than other times, hope to feel better soon! | |||||||||
| WA9VEZ | IN | W9 | EM69ue |
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Method: GPSDO stabilized IC-7851 and Visual Analyzer 2020 software in high resolution mode. Rx on USB tuned to about -1500 hz. Rx audio freq measured with Vis. Analyzer. Displayed Rx freq is added to VA audio freq for exact sub hertz Rx freq. Soapbox: Ionosphere path to "W5 land" seemed very stable but static crashes were enough to dump accuracy. Ohio path is probably a NVIS and that signal always seemed to be less stable than the shallower path southwest. | |||||||||
| WO7V | OR | W7 | CN92eg |
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Method: Flex radio, ribidium standard, Fldigi in the Frequency Analysis mode Soapbox: My first fmt in a while. Had to set an alarm to remind me. | |||||||||
| WQ8T | MI | W8 | EN74hf |
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Method: Equipment: HF2V antenna, an HP 3586C with an internal GPSDO, an RSP1A and a computer running SDRuno and DL4YHF's Spectrum Lab software to analyze a 15.625 kHz IF signal from the HP 3586C. Method: The RSP1A is used to find the frequency of the call-up signal and then the HP3586C is tuned to this frequency. SpecLab is used to determine the frequency of the peak of the IF signal from the HP3586C. The change of this value from 15.625 kHz is subtracted from the HP 3586C frequency setting to determine the received frequency. The sound card is calibrated using SpecLab’s continuous calibration using a 10 kHz reference signal, also from the HP3586C. Soapbox: Thank you K5CM and W8RKO. | |||||||||