ARRL Current FMT Results

Results - April 17, 2026 FMT

Actual Radio Frequencies (Hz):
	80m	40m
K5CM		7,064,124.77
W8RKO		7,065,103.30
K5CM	3,598,456.16
W8RKO	3,599,077.20

K5CM,W8RKO,K5CM,W8RKO All (<=1.0 Hz):
AF1R, AF9A, DJ3EI, K0MZ, K0WM, K5CM, K5ND, K6LL, K8GB, K8GNG, K9JM, KA7OEI, KA8BRK, KA9Q, KB3HF, KB4XR, KC1WIH, KC3VNB, KD2BD, KD5MMM, KD7KDO, KD8RV, KE6ZLX, KE8DO, KFS, KI4NVX, KI4WKZ, KI5EE, KJ6HYC, KN1H, KPH, N0PFE, N1IRO, N5TNL, N7QXB, N7WS, N8OBJ, N9DK, NF7R, VE2IQ, VE3CXB, VE3GSO, VE3ZRK, W1HB, W2FD, W3JW, W5SSV, W6DSR, W7LUX, W7SUA, W8TM, W9GR, W9INE, W9ZB, WA1SXK, WA4EFS, WA5UCW, WA6TPO, WB5MJM, WB7CAK, WB8REI

K5CM 80 (<=1.0 Hz):
AF1R, AF9A, AJ5P, DJ3EI, K0MZ, K0WM, K5CM, K5ND, K6LL, K7NG, K8GB, K8GNG, K8HN, K9JM, KA7OEI, KA8BRK, KA9Q, KB3HF, KB4XR, KC1WIH, KC3VNB, KC3ZYT, KD2BD, KD5MMM, KD7KDO, KD8RV, KE6ZLX, KE8DO, KFS, KI4NVX, KI4WKZ, KI5EE, KJ6HYC, KN1H, KPH, N0PFE, N1IRO, N3RTW, N5KAE, N5TNL, N7QXB, N7WS, N8OBJ, N9BPL, N9DK, NF7R, VE2IQ, VE3CXB, VE3GSO, VE3YX, VE3ZRK, W1HB, W2FD, W3FAY, W3JW, W5SSV, W6DSR, W7LUX, W7SUA, W8GNM, W8TM, W9GR, W9INE, W9ZB, WA1SXK, WA4EFS, WA5UCW, WA6TPO, WB5MJM, WB7CAK, WB8REI, WO7V

K5CM 80 (>1 to <=5 Hz):
VE3ICH, WB4DFW, WD8DSB

K5CM 80 (>5 to <=10 Hz):
AA7OO

K5CM 40 (<=1.0 Hz):
AA6LK, AE5OE, AF1R, AF9A, AJ5P, DJ3EI, G4BVE, IN LIMBO, K0MZ, K0WM, K5CM, K5ND, K6LL, K7NG, K8GB, K8GNG, K9JM, KA7OEI, KA8BRK, KA9Q, KB3HF, KB4XR, KC1WIH, KC3VNB, KD2BD, KD5MMM, KD7KDO, KD8RV, KE6ZLX, KE8DO, KFS, KI4NVX, KI4WKZ, KI5EE, KJ6HYC, KN1H, KPH, N0PFE, N1IRO, N5KAE, N5TNL, N7QXB, N7WS, N8OBJ, N9DK, NF7R, VE2IQ, VE3CXB, VE3GSO, VE3YX, VE3ZRK, W1HB, W2FD, W3JW, W5SSV, W6DSR, W7LUX, W7SUA, W8TM, W9GR, W9INE, W9ZB, WA1SXK, WA4EFS, WA5UCW, WA6TPO, WB4DFW, WB5MJM, WB7CAK, WB8REI, WD8DSB, WO7V, WQ8T

K5CM 40 (>1 to <=5 Hz):
AA7OO, K8HN, KC3ZYT, N3RTW, N9BPL, VE3ICH

K5CM 40 (>5 to <=10 Hz):
(none)

W8RKO 80 (<=1.0 Hz):
AA6LK, AF1R, AF9A, DJ3EI, IN LIMBO, K0MZ, K0WM, K5CM, K5ND, K6LL, K8GB, K8GNG, K8HN, K9JM, KA7OEI, KA8BRK, KA9Q, KB3HF, KB4XR, KC1WIH, KC3VNB, KC3ZYT, KD2BD, KD5MMM, KD7KDO, KD8RV, KE6ZLX, KE8DO, KFS, KI4NVX, KI4WKZ, KI5EE, KJ6HYC, KN1H, KPH, N0PFE, N1IRO, N3RTW, N5KAE, N5TNL, N7QXB, N7WS, N8OBJ, N9BPL, N9DK, NF7R, VE2IQ, VE3CXB, VE3GSO, VE3ZRK, W1HB, W2FD, W3FAY, W3JW, W5SSV, W6DSR, W7LUX, W7SUA, W8TM, W9GR, W9INE, W9ZB, WA1SXK, WA4EFS, WA5UCW, WA6TPO, WB5MJM, WB7CAK, WB8REI, WD8DSB, WQ8T

W8RKO 80 (>1 to <=5 Hz):
VE3ICH, VE3YX, WB4DFW, WO7V

W8RKO 80 (>5 to <=10 Hz):
(none)

W8RKO 40 (<=1.0 Hz):
AA6LK, AF1R, AF9A, AJ5P, DJ3EI, G4BVE, IN LIMBO, K0MZ, K0WM, K5CM, K5ND, K6LL, K7NG, K8GB, K8GNG, K8HN, K9JM, KA7OEI, KA8BRK, KA9Q, KB3HF, KB4XR, KC1WIH, KC3VNB, KC3ZYT, KD2BD, KD5MMM, KD7KDO, KD8RV, KE6ZLX, KE8DO, KFS, KI4NVX, KI4WKZ, KI5EE, KJ6HYC, KN1H, KPH, N0PFE, N1IRO, N5TNL, N7QXB, N7WS, N8OBJ, N9DK, NF7R, VE2IQ, VE3CXB, VE3GSO, VE3YX, VE3ZRK, W1HB, W2FD, W3FAY, W3JW, W5SSV, W6DSR, W7LUX, W7SUA, W8GNM, W8TM, W9GR, W9INE, W9ZB, WA1SXK, WA4EFS, WA5UCW, WA6TPO, WB4DFW, WB5MJM, WB7CAK, WB8ART, WB8REI, WD8DSB, WO7V, WQ8T

W8RKO 40 (>1 to <=5 Hz):
AA7OO, AE5OE, N3RTW, N9BPL, VE3ICH

W8RKO 40 (>5 to <=10 Hz):
N5KAE

K5CM 80 (>1 to <=5 Hz):
VE3ICH, WB4DFW, WD8DSB

K5CM 80 (>5 to <=10 Hz):
AA7OO

K5CM 40 (>1 to <=5 Hz):
AA7OO, K8HN, KC3ZYT, N3RTW, N9BPL, VE3ICH

K5CM 40 (>5 to <=10 Hz):
(none)

W8RKO 80 (>1 to <=5 Hz):
VE3ICH, VE3YX, WB4DFW, WO7V

W8RKO 80 (>5 to <=10 Hz):
(none)

W8RKO 40 (>1 to <=5 Hz):
AA7OO, AE5OE, N3RTW, N9BPL, VE3ICH

W8RKO 40 (>5 to <=10 Hz):
N5KAE

Entries (n=85):

Call Sign

QTH

Area

Grid

Method/Soapbox

AA6LK

CM98kw

	80m	40m
K5CM		7,064,125.55 0.78
W8RKO		7,065,103.00 -0.30
K5CM	3,598,356.10 -100.06
W8RKO	3,599,077.20 0.00

Method: HP Z3805A 10MHz GPSDO, Marconi 2019 HF synth, HP 3325A LF synth, HP 54601A o'scope, FT-847 in AM/narrow mode, 40m & 80m dipoles, 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 Mike and Connie for running the event. A lot of variations on each signal; only question was whether to add or subtract the 0.5 Hz fudge factor.

AA7OO

DM43eh

	80m	40m
K5CM		7,064,127.00 2.23
W8RKO		7,065,108.04 4.74
K5CM	3,598,463.97 7.81
W8RKO	3,599,066.89 -10.31

Method: IQ2 SDR; Antenna: Scorpion 80m-6m vertical; Radio Software: HDSDR;
Calibrated both IQ2, HDSDR, and PC clock prior to and after FMT.
Calibration source with WWV 20Mhz and GPS Displined Clock.
Calibration Correction was the same for both calibrations; 4.08hz.
Each transmission; the entire 40M and 80M band was digitally recorded.
Software that locked onto "Center Frequency" of FMT Intro, Key Down, and Closing.
Data points were recorded at 0.1hz.
At the same time locked on and tracked the Audio Track of Carrier.
The deviation of the data points within 10hz for each track.
The logged frequency tracks were then averaged to 3 places.
The audio track AF deviation and RF deviation tracked.
This is a mathematical calculation of data points, not a direct measurement.
Submitted FMT frequency as computed.

Soapbox: Known as the MARCA FMT Challenge where we challenge all our members to participate and compete. Always have fun with this challenge. Every event I try using a different approach.
HDSDR radio software replaced the normal HPSDR after noticing symptoms of corruption. A last-minute challenge and setup.
The 20m band appeared good, while 80m band was low.
W8RKO signals were low on both bands and almost unreadable on 80m.
Able to copy all 4 FMT runs.

AE5OE

EM10el

	80m	40m
K5CM		7,064,124.70 -0.07
W8RKO		7,065,102.10 -1.20
K5CM	3,598,336.10 -120.06
W8RKO	3,598,957.20 -120.00

Method: Inverted "V" DUAL BAND, DX392 RX, SI570 GENERATOR, GLOBAL SPEC FREQ COUNTER, GPS RX 1MHZ TIMEBASE GENERATOR, PHILIPS SCOPE

Soapbox: FIRST TIMER AT THIS. USED THE DOUGLAS LUNG METHOD. LOTS OF FUN. HOPE TO IMPROVE NEXT TIME. 73

AF1R

FN42jh

	80m	40m
K5CM		7,064,124.93 0.16
W8RKO		7,065,103.46 0.16
K5CM	3,598,456.08 -0.08
W8RKO	3,599,077.17 -0.03

Method: Use FLDIGI FMT mode.Use CHU 7850 and 3330 carriers as frequency references, and calculate a correction factor. Add or subtract this correction factor from the measured frequency during the FMT.

Soapbox: Always a fun challenge!

AF9A

EM69wv

	80m	40m
K5CM		7,064,124.72 -0.05
W8RKO		7,065,102.98 -0.32
K5CM	3,598,456.16 0.00
W8RKO	3,599,077.21 0.01

Method: (none)

Soapbox: Thanks for another fine FMT!

AJ5P

EM51kr

	80m	40m
K5CM		7,064,124.80 0.03
W8RKO		7,065,103.10 -0.20
K5CM	3,598,456.40 0.24
W8RKO	3,599,137.00 59.80

Method: New rig this time, Yaesu ftx-1. FLdigi

Soapbox: All signals very good except W8RKO on 80 M. That was in the noise and low confidence accuracy.

DJ3EI

JO62sk

	80m	40m
K5CM		7,064,124.39 -0.38
W8RKO		7,065,103.26 -0.04
K5CM	3,598,456.18 0.02
W8RKO	3,599,077.44 0.24

Method: My usual (mediocre dipole) antenna, hooked up to my usual station. Special equipment is all software. My usual IC-705 rig provides its usual built-in USB sound card to my PC running Linux as usual with its usual pipewire sound system. The first special thing is a program adopted from the pipewire API, it receives the samples from the rig and writes a timestamp each 1024 samples. This is done mostly for FMTLab, not really needed for ARRL FMT. A homegrown Jupyter notebook analyses those recordings. Determination of frequency done by running (numpy) dot products: Of samples from exp(jωt) with samples from the signal. Trying many values of ω systematically. This is similar to a Fourier transform; I choose the number of samples into the dot product to approximately fit a full period the frequency underlying ω. I do this for 5 slices per signal, each slice being about 10 s long, look manually for obvious outliers (none found this time), and then average the resulting frequency values. The values for K5CM on 40 spread out over about 0.5 Hz, W8RKO 40 over 0.3 Hz, K5CM on 80 over 0.2 Hz, W8RKO on 80 m over 0.5 Hz.

The precision mostly rests on my IC-705's calibration. This is done by measuring the frequency of Moscow's RWM time signal transmitter, pretty much by the same method.

Soapbox: The conditions were workable. Juliusruh reported a MUF 3000 km nightly low of 10 MHz. Indeed, I could detect each signal with my ears, not just by pulling it out of the noise with software like I had to last November. The 40 m signals were both fine, so was K5CM on 80. But W8RKO on 80 m was quite weak, would have been too weak for a CW QSO unless with a LOT of patience. QRM was present, but moderate; worst were some undisciplined ops violating the band plan with an LSB phone QSO with dial frequency on 3601 kHz.

Thanks for providing this fine contest!

G4BVE

IO82mp

	80m	40m
K5CM		7,064,124.30 -0.47
W8RKO		7,065,103.24 -0.06
K5CM
W8RKO

Method: Elad FDM-Duo, RFZero GPSDO, Windows 11 PC running SpectrumLab. Elad is locked to the GPSDO. Antenna 40m EFHW.

Soapbox: Good signals from both stations on 40m. Nothing from K5CM on 80m and the signal from W8RKO was just detectable.
Many thanks for all your efforts.
FMT enthusiasts please check out the EU FMT: https://fmtlab.org/
73 John G4BVE (ex GW4BVE)

IN LIMBO

EM00kb

	80m	40m
K5CM		7,064,124.59 -0.18
W8RKO		7,065,102.66 -0.64
K5CM	3,598,445.62 -10.54
W8RKO	3,599,077.11 -0.09

Method: Signal Hound SA44B with ext ref from free-running Rb. Record the resulting IQ data and SA44B CF setting to disk, process with home-brew SW
program to obtain phase error vs time, manually plot "best fit" straight line and measure slope thereof in aid of getting actual signal frequency.

Soapbox: SA44B has some freq error from its stated tune freq, but this is in the sub-milli-Hz arena in this part of the spectrum and was ignored in the analysis for the FMT.

K0MZ

DM03ts

	80m	40m
K5CM		7,064,125.00 0.23
W8RKO		7,065,104.00 0.70
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.50 0.30

Method: TR-7 receiver tuned to signal with suitable CW pitch. Local oscillator tuned to match TR-7 CW pitch by ear for zero beat. Oscillator counted with a Heath IM-4100 counter clocked with an HP 10544A OCXO calibrated to WWV at noon.

Soapbox: The first 3 signal sets were similar in strength at 10 dB over S-9 with little fade. The W8RKO signal varied from S-7 to S-9 with several deeper fades. Thank you Mike and Connie for providing an evening of fun and the magic of radio. The FMT is always fun.

K0WM

DM79jt

	80m	40m
K5CM		7,064,124.76 -0.01
W8RKO		7,065,102.89 -0.41
K5CM	3,598,456.16 0.00
W8RKO	3,599,077.02 -0.18

Method: Rig is a Yaesu FT-1000MP, Rockwell/Collins 180S-1 tuner, 40-meter dipole and a Fluke 8845A. Calibrate the receiver with a Bodnar GPSDO. I use my homebrew Excel spreadsheet to analyze FMTs, with varying degrees of success. :-)

Soapbox: Very stable conditions. Thanks to Connie and Mike for continued support of this enlightening event. The FMT keeps radio interesting.

K4CXX

EL98pd

	80m	40m
K5CM
W8RKO		7,065,901.80 798.50
K5CM	3,599,256.20 800.04
W8RKO	3,599,877.70 800.50

Method: (none)

Soapbox: The Doppler and fading were quite noticeable. Good signals into eastern central Florida. Thanks to K5CM and W8RKO for their delivery of timely and good signals.

K5CM

EM25ir

	80m	40m
K5CM		7,064,124.77 0.00
W8RKO		7,065,103.20 -0.10
K5CM	3,598,456.16 0.00
W8RKO	3,599,077.20 0.00

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. Antenna is a dipole at 80 ft on 40 meters, and a dipole at 60 feet on 80 meters.
RX: K3 in AM mode with low side injection from a GPS locked HP-3336B. Audio is feed to Spectrum lab. Antenna is a 500 ft beverage.

Soapbox: Mike had good signals on both bands.
73, Connie K5CM

K5ND

EM12kv

	80m	40m
K5CM		7,064,124.31 -0.46
W8RKO		7,065,102.62 -0.68
K5CM	3,598,456.42 0.26
W8RKO	3,599,077.47 0.27

Method: IC-746PRO with CR-388 high stability oscillator. Cushcraft MA6V vertical antenna. Rig warmed up for three days. WSJT-X frequency calibrated one hour before the test. Measured with WSJT-X.

Soapbox: Good, strong signals on all four transmissions with S/N running at 40 to 50. My procedure went well without the usual fumbling.

K6LL

DM22qq

	80m	40m
K5CM		7,064,124.74 -0.03
W8RKO		7,065,103.18 -0.12
K5CM	3,598,456.25 0.09
W8RKO	3,599,077.15 -0.05

Method: Uncalibrated K3 in AM mode. Bodnar GPSDO used as BFO. Spectrum Lab Peak Detector to record the resulting beat frequency. Spreadsheet with 3 Sigma wild point editor to average the beat frequency results. Final result equals GPSDO + averaged beat frequency. No Doppler correction.

Soapbox: Signals were good, but W8RKO had competition from a loud MFSK signal on 80. One disadvantage of my using a receiver in AM mode is that narrow filters are not available. The Spectrum Lab peak detector seemed to latch onto the key-down signal nicely though, right through the MFSK.

K7NG

CN73ui

	80m	40m
K5CM		7,064,124.39 -0.38
W8RKO		7,065,102.82 -0.48
K5CM	3,598,456.10 -0.06
W8RKO

Method: IC-7610, 43' vertical, FLDIGI. 'Frequency Analysis' mean value over test tone period.

Soapbox: Could not use GPSDO this time so had to frantically attempt rechecking the internal reference in the 7610 against WWV. Both K5CM and W8RKO had good sigs on 40m. K5CM was OK on 80m. Unfortunately, W8RKO on 80m was very weak and S9+15 digi traffic overtop W8RKO completely and utterly obscured RKO during the test interval.

May I politely request consideration to use another part of the band for the 80m FMT? How about 3501 and 3502 kHz? You don't have to have an Extra Class license to receive!

K8GB

EN82ln

	80m	40m
K5CM		7,064,124.12 -0.65
W8RKO		7,065,102.36 -0.94
K5CM	3,598,456.27 0.11
W8RKO	3,599,077.47 0.27

Method: (none)

Soapbox: (none)

K8GNG

EN82cm

	80m	40m
K5CM		7,064,125.02 0.25
W8RKO		7,065,102.93 -0.37
K5CM	3,598,456.07 -0.09
W8RKO	3,599,077.15 -0.05

Method: Yaesu FTdx10, fldigi "Frequency Measurement Test", recorded data processed with Excel.

Soapbox: Pre and post run calibration measurements of known stations, 3.330 MHz, 5.000 MHz, 7.850 MHz. Measured data adjusted with interpolated calibration offsets, averaged pre/post test. Still uncertain if this is a good method, so we'll see!

K8HN

EM79xq

	80m	40m
K5CM		7,064,123.45 -1.32
W8RKO		7,065,103.10 -0.20
K5CM	3,598,455.78 -0.38
W8RKO	3,599,076.99 -0.21

Method: Kenwood TS2K and WSJT. Calibrate an hour before FMT with stations at 2.5, 3.33 5.0 7.85 and 10.0 MHz. Plotted each recorded data, threw out visual outliers, then averaged remaining.

Soapbox: Thanks to K5CM and W8RKO for sending out long strong signals!

K9JM

CM99lc

	80m	40m
K5CM		7,064,124.64 -0.13
W8RKO		7,065,103.34 0.04
K5CM	3,598,456.37 0.21
W8RKO	3,599,077.52 0.32

Method: Calibrated K3s and tuning forks... hampered by hayfever

Soapbox: Thanks for another FMT! K5CM and W8RKO 40m signal excellent! some QSB
K5CM on 80 was excellent, W8RKO was in the middle of a digital signal and weak. Good luck!!

KA7OEI

DN40ao

	80m	40m
K5CM		7,064,124.59 -0.18
W8RKO		7,065,103.21 -0.10
K5CM	3,598,456.25 0.09
W8RKO	3,599,077.16 -0.04

Method: Receiver: FT-817, Antenna: 80 meter full-wave horizontal loop.
Used Schlumberger 4031 referenced to HP-Z3801 GPSDO, injected signal into antenna path and recorded with Audacity.
For analysis, played back into DH4YHF Spectrum Lab and analyzed the 48kHz file with a 256k FFT with a decimation of 4 (bin width: 46mHz). Did "eyeball" correction of Doppler as necessary. Actual FMT TX frequency determined by measuring the difference between the locally-known-and-correct and the off-air signals and doing the math.

Soapbox: Doppler shift/spread was minimal for both stations on 40 meters - checked WWV5 for K5CM and WWV5 and CHU7.8 for W8RKO.

Signals from K5CM were rock solid on 80 meters with minimal QSB, but W8RKO's signals were much weaker - particularly at the beginning of the call-up: Much more QSB and Doppler spread on W8RKO's 80 meter signal than the others.

KA8BRK

EN81fc

	80m	40m
K5CM		7,064,124.55 -0.22
W8RKO		7,065,102.80 -0.50
K5CM	3,598,455.98 -0.18
W8RKO	3,599,077.30 0.10

Method: Icom IC-706MKII, 80 meter Inverted Vee, Bodnar Mini GPSDO, FLDigi, Libre Office, No attempt to correct for Doppler

Soapbox: Reasonably strong signals, some QRN, some QSB, Medium Doppler, frequency spread as much as .8 Hz.

KA9Q

DM12ju

	80m	40m
K5CM		7,064,124.74 -0.03
W8RKO		7,065,103.32 0.02
K5CM	3,598,456.14 -0.02
W8RKO	3,599,077.24 0.04

Method: W6LVP loop + WB6CXC shelving filter + RX888 MkII + Leo Bodnar GPSDO + ka9q-radio + custom FFT analysis software.

Soapbox: My first FMT. Wrote my analysis software from scratch. Recorded IQ files from all 4 test frequencies, 6 WWV frequencies and 3 CHU frequencies simultaneously from 0225-0325Z. Ionospheric corrections estimated from closest WWV/CHU frequency at same time as test transmission. This was fun.

KB3HF

EM48qs

	80m	40m
K5CM		7,064,125.06 0.29
W8RKO		7,065,103.22 -0.08
K5CM	3,598,456.05 -0.11
W8RKO	3,599,076.96 -0.24

Method: TS-890 - Dual Band Dipole - WSPR software

Soapbox: Great signals last night. Tnx for the exercise!

KB4XR

FM18hw

	80m	40m
K5CM		7,064,124.42 -0.35
W8RKO		7,065,103.12 -0.18
K5CM	3,598,456.33 0.17
W8RKO	3,599,077.31 0.11

Method: Yaesu FT-710, FLDIGI FMT, Bodnar GPSDO for ref, spectral analysis of audio recording using SCILAB and SpectrumLab tools. Attic G5RV. SCILAB corrects for sound card PPM error and does spectral analysis. SpectrumLab used as validation. FLDIGI for recording, timekeeping, and secondary validation.

Soapbox: Good conditions across the board in VA - best of any FMT in the past 3 years. WWV 5 MHz was unusually loud and clear. Virtually no doppler. No excuses. Hopefully no boneheaded mistakes.

Thank you W8RKO & K5CM. I hope this was fun for you as well.

KC1WIH

FN42ff

	80m	40m
K5CM		7,064,124.59 -0.18
W8RKO		7,065,103.37 0.07
K5CM	3,598,456.07 -0.09
W8RKO	3,599,077.17 -0.03

Method: IC-7300 via direct USB audio to Linux PC running Fldigi 4.2.11 in Frequency Analysis mode. Pre/post WWV brackets at 5 and 10 MHz (40m runs) or 2.5 and 5 MHz (80m runs). First FMT entry.

Soapbox: Thanks to K1IG for his excellent presentation and instructions!

KC3VNB

FN00dl

	80m	40m
K5CM		7,064,124.73 -0.04
W8RKO		7,065,103.32 0.02
K5CM	3,598,456.13 -0.03
W8RKO	3,599,077.21 0.01

Method: ICOM 7300 set to AM mixing with a gpsdo driven sig gen set approx 1kHz low. Beat measured with Spectrum Lab - averaged and offset with Doppler drifts measured from 5MHz WWV and 7.85MHz CHU.

Soapbox: W8RKO 40m had pretty serious multipath. Other signals were reasonably clean. As always, big fun, and many thanks to K5CM and W8RKO. 73

KC3ZYT

FN00kp

	80m	40m
K5CM		7,064,122.60 -2.18
W8RKO		7,065,102.82 -0.48
K5CM	3,598,456.03 -0.14
W8RKO	3,599,077.20 0.00

Method: Hermes Lite 2, DeskHPSDR, Leo Bodnar LBE-1421, both FLDigi and WSJT-X, and assuming that the 10MHz reference clock was enough to stabilize everything to within 1Hz

Soapbox: I only got my GPSDO a few days before the actual test, so I still wasn't quite sure I had everything calibrated correctly. I'm not expecting anything super-accurate, but I had fun with this test anyways. I can't wait for the next one!

KD2BD

FN20xd

	80m	40m
K5CM		7,064,124.46 -0.31
W8RKO		7,065,103.30 0.00
K5CM	3,598,456.07 -0.09
W8RKO	3,599,077.30 0.10

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 at: https://www.qsl.net/kd2bd/fmt-methodology.html

Soapbox: Conditions were stable and signals were strong. The estimated Kp-index was 0.67. Connie had some minor QSB on 40, but Mike was like a signal generator in the room with me. Mike's call-up suffered from significant QSB, but the keydown period was solid. MUCH better conditions than in November. TNX ES 73.000 de John, KD2BD

KD5MMM

EL19ds

	80m	40m
K5CM		7,064,124.90 0.13
W8RKO		7,065,103.10 -0.20
K5CM	3,598,456.80 0.64
W8RKO	3,599,077.60 0.40

Method: FT847, SpecLab, spreadsheet, CHU for reference

Soapbox: Strong sigs here, W8RKO on 80m had interference, not sure about that one.

KD7KDO

DM33xm

	80m	40m
K5CM		7,064,124.65 -0.12
W8RKO		7,065,102.82 -0.48
K5CM	3,598,456.13 -0.03
W8RKO	3,599,077.05 -0.15

Method: IC7300, FLDIGI, RIGOL-DG1022, WWV

Soapbox: W7MOT -- MARCA FMT Challenge ... go club!!
I didn't expect W8RKO to transmit overtop the Canadian RATTSNET

KD8RV

EN82mj

	80m	40m
K5CM		7,064,124.80 0.03
W8RKO		7,065,102.70 -0.60
K5CM	3,598,456.20 0.04
W8RKO	3,599,077.30 0.10

Method: Call up spotted with a GPS locked K3. Final resolution determined with GPS locked SDRPlay RSP-Dx into SDRUno software using its SAM DSB mode to obtain the 100 mHz digit. I did not make any doppler corrections. There appeared to be some relatively stable portions of the key-down and that's where I focused on trying to obtain my final measurement values. All signals from an 80 meter delta loop that survived the winter.

Soapbox: So very grateful the persistent heavy thunderstorms that have plagued the area for most of this week gave a bit of a break here tonight for the FMT. Had this been scheduled for last night, I'm sure the disconnected antenna would have made for a hard time copying the signals!
Sincere thanks and very 73 to all who make this event possible!

KE6ZLX

DM13ie

	80m	40m
K5CM		7,064,124.66 -0.11
W8RKO		7,065,102.90 -0.40
K5CM	3,598,456.28 0.12
W8RKO	3,599,077.10 -0.10

Method: SDR receiver based on the MSI 001 and MSI 2500 chip set running SDRuno. Distill am bandstop filter. Mega loop ant MLA-30. U-BLOX LEA-M8T-0-10 Huawei GPS module controlled by Ublox U-Center in fixed mode providing reference freqs. (UNK freq - REF freq) + REF freq. Signals analyzed with fldigi. Results plotted and outliers removed. Mean of remaining measurements reported.

Soapbox: Signals were readable in San Diego. 80-meter signals were on the weak side but still above the noise floor. Fldigi was able to analyze the signals with no problems. W8RKO 80-meter was competing with a wide digital signal. As always thank you K5CM and W8RKO for this great FMT!

KE8DO

EM68ug

	80m	40m
K5CM		7,064,125.01 0.24
W8RKO		7,065,102.93 -0.37
K5CM	3,598,456.08 -0.09
W8RKO	3,599,077.25 0.05

Method: Nothing special; IC-705 WSJT-X. No GPS standard, just CHU. Old CB mobile whip on the house roof for the antenna.

Soapbox: Signals were good, no QRM. I have a GPS frequency standard somewhere, but I can not find it after my last move, maybe I can find it for nest time. Also, an IC-7610 is on my bucket list for Dayton.

KFS

CM87tj

	80m	40m
K5CM		7,064,125.47 0.70
W8RKO		7,065,103.76 0.46
K5CM	3,598,456.96 0.80
W8RKO	3,599,077.96 0.76

Method: TCI 530 omni log periodic + RX888 + ka9q-radio + custom analysis software by KA9Q

Soapbox: Same setup as at KA9Q except for antenna location. WWV/CHU offsets observed to be much higher than in San Diego, maybe the later sunset.

KI4NVX

FM09vc

	80m	40m
K5CM		7,064,124.55 -0.22
W8RKO		7,065,103.24 -0.06
K5CM	3,598,456.54 0.38
W8RKO	3,599,077.42 0.22

Method: QRP-LABS QDX LOW BAND. LEO BODNAR LBE-1420 GPSDO FOR BASIC REFERENCE
ARRL EFHW - BOX STOCK FOR 40-20-15-10
FLDIGI 4.2.11 - WINDOWS 11
RAN DOPPLER ESTIMATE CALCULATIONS AGAINST CHU at 7.85MHz JUST BEFORE RUN

Soapbox: ADDED 0.2 GUESSTIMATE FOR DOPPLER. HOPE I DIDN'T DORK IT . . .
THANK YOU CONNIE AND MIKE FOR RUNNING THESE SUPER FUN TESTS.
WAS PLEASED TO GET REASONABLE SIGNALS ON 80M FROM THE EFHW THIS TIME AROUND. HAD BEEN DEAD TO 80 ON PREVIOUS RUNS FROM MY VA QTH.

KI4WKZ

FM07db

	80m	40m
K5CM		7,064,124.50 -0.27
W8RKO		7,065,102.98 -0.32
K5CM	3,598,456.04 -0.12
W8RKO	3,599,077.36 0.16

Method: ICOM7000, EFHW8010 ant. FLDIGI FMT to record during the test. Additional separate spreadsheet calculations of the radio errors as a function of frequency using WWV and CHU.

Soapbox: Signals were clearly copied during the FMT.

KI5EE

EM30jd

	80m	40m
K5CM		7,064,125.05 0.28
W8RKO		7,065,103.04 -0.26
K5CM	3,598,456.18 0.02
W8RKO	3,599,077.00 -0.20

Method: Kenwood TS-2000 and Spectrum Lab.

Soapbox: I had good signals but normal amount of doppler.

KJ6HYC

FM15mk

	80m	40m
K5CM		7,064,123.80 -0.97
W8RKO		7,065,103.00 -0.30
K5CM	3,598,455.90 -0.26
W8RKO	3,599,076.90 -0.30

Method: Shack @ 72F, IC-7610 W/8Hr. warm up, 80M doublet, checked against WWV 5 & 10 MHz. generated correction factors. Took readings, applied correction factors. recorded on this site.

Soapbox: (none)

KK4KAZ

EL88qn

	80m	40m
K5CM		7,063,649.42 -475.36
W8RKO		7,064,627.99 -475.31
K5CM	3,597,980.81 -475.35
W8RKO	3,598,601.80 -475.40

Method: SDRplay RSPdx, Rigol DG-1022 Dual Channel GPS-locked Generator, BG7TBL GPSDO, Bodnar LBE-1421 GPSDO Locked Clock Source, HP53131A GPS Locked Universal Counter.

Sig Gen generates two GPS-locked Frequency Markers, adjusted to be above and below Target Frequency, Spectrum Lab post-processes audio by detecting and estimating the three peaks, and outputs frequency estimates about every 0.2 seconds. Hundreds of data samples are statistically computed in an Excel Spreadsheet, and the target frequency is estimated accurately between the two frequency markers.

Soapbox: Much doppler frequency drift on Tests 1 & 2, even double peaks. I'm hoping to be in the green for all 4 tests for the first time! Here's hoping! LOL

KN1H

FN33sg

	80m	40m
K5CM		7,064,124.68 -0.09
W8RKO		7,065,103.26 -0.04
K5CM	3,598,456.05 -0.11
W8RKO	3,599,077.11 -0.09

Method: IC-7300, SW and W facing EWE antennas. Averaged about 50 samples of each transmission with Spectrum lab. Computer and radio running for 3 days for stabilization.

Soapbox: Both stations 599 on both bands. Violent thunderstorms arrived here for both 80M transmissions so results are suspect due to limited input. Thanks to K5CM and W8RKO for hosting this fun and interesting event!

KPH

CM87ww

	80m	40m
K5CM		7,064,125.44 0.67
W8RKO		7,065,103.79 0.49
K5CM	3,598,456.99 0.83
W8RKO	3,599,077.95 0.75

Method: TCI 530 omni log periodic (same type as KFS) + RX888 + ka9q-radio + custom FFT software (same as KFS & KA9Q)

Soapbox: Same large ionospheric offsets on WWV/CHU as seen at KFS, and larger than at KA9Q in San Diego.

N0PFE

EM00ul

	80m	40m
K5CM		7,064,124.50 -0.27
W8RKO		7,065,103.50 0.20
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.00 -0.20

Method: Equipment: Elecraft K3, AV640 used on 40 meters and end fed wire used on 80 meters. I zero beat WWV on 5MHz and examine Spectrum Lab frequency response. I let the radio sit for several hours to get it stable.

My K3 is getting long in the tooth.

I have not changed from this method for several FMTs.

Soapbox: Despite storms in the distance, conditions were pretty good. Especially on 40 meters. Not really any fade and both stations were S9+ here in Central TX. I finally have an antenna for 80 meters so I was not deaf on that band for W8RKO as he was barely coming in on the vertical. K5CM was strong here on 80 meters. On 40m, I had to do a .5 Hz interpolation between the single Hz reading of the zero beat as right on the Hz was not quite right.

About half way through the 40 meter session, I noticed that the Spectrum Lab frequency was down about 1 Hz so I hope that wasn't a sign I goofed up the tuning :-(

As usual, always fun to do.

N1IRO

FN33qw

	80m	40m
K5CM		7,064,124.65 -0.12
W8RKO		7,065,103.28 -0.02
K5CM	3,598,456.22 0.06
W8RKO	3,599,077.34 0.14

Method: KiwiSDR with 80m OCF antenna on ground. Record to .wav and analyzed with Spectrum Lab software.

Soapbox: Trying a new technique as storms damaged most of my antennas this winter. Using a solar powered KiwiSDR out in the backyard. Thanks for doing this!

N3RTW

FM18js

	80m	40m
K5CM		7,064,122.21 -2.56
W8RKO		7,065,100.29 -3.01
K5CM	3,598,456.09 -0.07
W8RKO	3,599,077.29 0.09

Method: K3 with LBE-1420 GPSDO for a reference signal, fldigi FMT modem.

Soapbox: Signals were clear here.

N5KAE

EL29gb

	80m	40m
K5CM		7,064,124.56 -0.21
W8RKO		7,065,112.89 9.59
K5CM	3,598,456.77 0.61
W8RKO	3,599,077.87 0.67

Method: Icom 746pro, wsjt software, 80 meter Vee. Calibrated to 5, 10, and 15 MHz WWV.

Soapbox: Hope it worked !!!

N5TNL

EM25ui

	80m	40m
K5CM		7,064,124.18 -0.59
W8RKO		7,065,103.14 -0.16
K5CM	3,598,456.34 0.18
W8RKO	3,599,077.01 -0.19

Method: random wire antenna, RX888 + thunderbolt GPSDO, ka9q-radio, wd-record, SDR Console to demod, Fldigi to measure. Compare to CHU and WWV for Doppler estimates.

Soapbox: Data and IQ files at https://www.n5tnl.com/ham/fmt/2026-04/fmt_2026_04.html

Thanks to K5CM and W8RKO for another fun contest!

N7QXB

DN40cq

	80m	40m
K5CM		7,064,124.33 -0.44
W8RKO		7,065,102.99 -0.31
K5CM	3,598,456.15 -0.01
W8RKO	3,599,076.95 -0.25

Method: Elecraft K4D, Leo Bodnar GPSDO, WWV, and Spectran software

Soapbox: Thanks to W8RKO and K5CM for hosting the FMT. Bad QRM on last frequency.

N7WS

DM42jh

	80m	40m
K5CM		7,064,124.75 -0.02
W8RKO		7,065,103.10 -0.20
K5CM	3,598,456.30 0.14
W8RKO	3,599,077.10 -0.10

Method: Bodnar GPSDO through stepped attenuator to directional coupler to SDR-IQ RX input. Bodnar set to ~600 Hz below received signal. Stepped attenuator sets reference amplitude to roughly the same as the received signal. Multipath fading makes this a SWAG. Record AM demodulated spectrum via SpectraVue S/W for later analysis. Photograph SpectraVue and Bodnar screens for backup. Extract keydown portion of audio recording with Audacity S/W. Clean up the audio with High and low pass filtering and save copy for analysis. Analyze with Spectrum Lab S/W.

Soapbox: Thanks to Connie and Mike for their efforts. The bands were so-so, with lots of spreading on all frequencies. There was an ongoing QSO on Mike's 80-meter QRG but he obliterated them. He did not contend as well with the digital signal slightly up the band. It took a lot of messing with filtering to overcome this.

N8OBJ

EN91fh

	80m	40m
K5CM		7,064,124.92 0.15
W8RKO		7,065,103.72 0.42
K5CM	3,598,456.38 0.22
W8RKO	3,599,077.55 0.35

Method: Flex6500 running SmartSDR V1.12.1, HP Z3801A GPSDO, 10-80M OCF dipole, FLDigi V 4.1.18 running in Freq Analysis mode, Leo Bodnar GPSDO as ref std to cal out FLEX6500 synthesized tuning errors

Soapbox: Since the ionosphere is rising at this time of night (causing a negative Doppler shift) I used the last 3 years errors to help 'correct' my measurements. Will see how bad this turns out...

N9BPL

EL96wi

	80m	40m
K5CM		7,064,122.51 -2.26
W8RKO		7,065,102.20 -1.10
K5CM	3,598,455.81 -0.35
W8RKO	3,599,076.99 -0.21

Method: RSPduo with Leo Bodnar GPSDO Reference. Processed with FLDigi

Soapbox: W8RKO was pretty weak on 80m. Thanks to all who put this together.

N9DK

CM87wj

	80m	40m
K5CM		7,064,124.35 -0.42
W8RKO		7,065,102.67 -0.63
K5CM	3,598,456.08 -0.08
W8RKO	3,599,077.07 -0.13

Method: TS-690, after-market SO-2 TCXO , digirig, fldigi in fmt mode; Leo Bodnar LBE-1420 GPSDO 1420 fed through fix attenuator, step attenuator, T with antenna feed, and into radio; 1420 set 100 Hz above expected frequency and then adjusted if necessary

Soapbox: Couldn't follow my notes from last one 2 years ago. I hope I made better notes this time!

NF7R

DM26so

	80m	40m
K5CM		7,064,124.76 -0.01
W8RKO		7,065,103.09 -0.21
K5CM	3,598,456.22 0.06
W8RKO	3,599,077.12 -0.08

Method: IC-7300 FLDIGI 160/80/40/20 common feed fan dipole/inverted Vee

Soapbox: All sigs S8 or better, but severe QRM on W8RKO 80M from very strong digital stations. Fortunately FLDIGI, once I found W8RKO, seemed to lock on it and not be distracted.
Please find FMT frequencies NOT in the digital happy hunting grounds.
Otherwise very enjoyable learning experience!

VE2IQ

FN15nt

	80m	40m
K5CM		7,064,124.79 0.02
W8RKO		7,065,103.32 0.02
K5CM	3,598,456.04 -0.12
W8RKO	3,599,077.01 -0.19

Method: Dipole > TS850 CW > soundcard > Homebrew software. Record all transmissions, analyze later. TS850 clocked from external OCXO, calibrate with 24-hr run vs GPS. Don't tweak OCXO, just record the error (ppm), correct for it. Correct for TS850 synthesizer offsets. Monitored WWV 5-MHz carrier freq during FMT. No attempt (yet) to correct for any Doppler (seemed minimal except for W8RKO 80M run.)

Soapbox: Many thanks to Connie, Mike, Bruce for putting on the FMTs. Condx were good, S9+ all sigs. Appreciate one-minute keydowns at published times and making results available immediately after submission deadline.

VE3CXB

FN03ag

	80m	40m
K5CM		7,064,124.60 -0.17
W8RKO		7,065,103.50 0.20
K5CM	3,598,456.40 0.24
W8RKO	3,599,077.50 0.30

Method: SDRplay RSPdx locked to a Bodnar LBE-1420 GPSDO. Read the frequency off of the spectrum display and interpolate the tenth of a Hertz as best as one can.

Soapbox: The 80m signals were down quite a bit compared to the 40m signals.

VE3GSO

EN92ix

	80m	40m
K5CM		7,064,124.49 -0.28
W8RKO		7,065,102.90 -0.40
K5CM	3,598,455.88 -0.28
W8RKO	3,599,077.09 -0.11

Method: Bodnar Reference Oscillator set 400 Hz low on narrow bandwidth AM receiver, IC7610, and Spectrum Lab

Soapbox: Good signals tonight, some multipath fading on W8RKO at this QTH. Lots of QRN on 80m, and some digital interference. Thanks guys. That was fin. Now its fingers crossed time.

VE3ICH

FN25bg

	80m	40m
K5CM		7,064,128.00 3.23
W8RKO		7,065,107.00 3.70
K5CM	3,598,459.00 2.84
W8RKO	3,599,080.00 2.80

Method: (none)

Soapbox: This event is always fun!

VE3YX

FN16fd

	80m	40m
K5CM		7,064,124.63 -0.14
W8RKO		7,065,103.36 0.06
K5CM	3,598,456.00 -0.16
W8RKO	3,599,079.93 2.73

Method: FLdigi in FMT mode with GPSDO stabilized ref. signal. TS-2000 sharing the dipole with GPSDO stabilized TS-870. The 870 was on WWV 5 MHz. Another instance of FLdigi on a 2nd PC recorded WWV during the FMT key down times. I used the Doppler error on WWV to "correct" the readings from the 2000. Will that work? Probably not.

Soapbox: All signals were good but there was the lower freq. part of OL 16/1000 on top of W8RKO's 80 m signal. FLdigi completely corrupted the W8RKO 80 m files so all I got was maybe 10 sec. of the .wav file. I suspect my results for that run will be garbage :-(((

VE3ZRK

FN25di

	80m	40m
K5CM		7,064,124.58 -0.19
W8RKO		7,065,103.29 -0.01
K5CM	3,598,456.36 0.20
W8RKO	3,599,077.20 0.00

Method: Comparison / HP Z3801A GPSDO controlling Siglent 1032X Plus Function Generator / Icom IC-7300 Xceiver / coax relay switched the Icom RF input between the off air antenna and the function generator output / Icom audio out via internal USB sound card feeding a laptop running Visual Analyser V25.50

Soapbox: Good clear signals on 40M, but QSB on the 80M transmissions

Many thanks to David Green VE3TLY for his help

And many thanks to the crew who put this event together

W1HB

FM18ku

	80m	40m
K5CM		7,064,124.40 -0.37
W8RKO		7,065,103.00 -0.30
K5CM	3,598,456.10 -0.06
W8RKO	3,599,077.20 0.00

Method: (none)

Soapbox: 73

W2FD

EN91wx

	80m	40m
K5CM		7,064,124.85 0.08
W8RKO		7,065,102.83 -0.47
K5CM	3,598,456.28 0.12
W8RKO	3,599,077.17 -0.03

Method: IC 7100/ oscilloscope/audio generator/audio frequency counter/ Synch scope trace with audio generator. Frequency of audio generator measured to two places. Near 600 Hz. output from IC 7100 measured for CW /RCW output. WWV used for calibration source.

Soapbox: All Signals were adequate in spite of the high level of noise on the bands. Thanks to Connie and Mike for your continued dedication.

W3FAY

FM18ox

	80m	40m
K5CM		7,064,168.00 43.23
W8RKO		7,065,103.00 -0.30
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.00 -0.20

Method: Kenwood TS-890S w/Leo Bodnar GPSDO reference; vertical; FLDIGI for frequency measurement. Radio set to D-USB, adjusted VFO frequency for 1500 Hz peak audio measurement with FLDIGI. Measured frequency reading taken direct from FLDIGI. Measured CHU at 3330 kHZ and 7850 kHz prior to test.

Soapbox: First time doing this with FLDIGI and was not well-practiced with this method. I blew the first measurement and resorted to analyzing a steady sample portion of the keydown test signal from the FLDIGI wav file with Audacity to determine the audio tone; then obtained the corresponding logged dial frequency from the FLDIGI csv file to derive the measured frequency.

W3JW

FM17tq

	80m	40m
K5CM		7,064,124.33 -0.44
W8RKO		7,065,103.14 -0.16
K5CM	3,598,456.13 -0.03
W8RKO	3,599,077.27 0.07

Method: Icom 7610 (with external oven controlled ref. osc.) into SpectrumLab

Soapbox: All signals were well above noise level(K5Cm S9+15dB on 40M and S9+10dB on 80M;W8RKO S9+20dB on 40M and S9 on 80M). Digital QRM noted but not a measurement issue. Doppler shift and multipath were certainly present but hopefully not as troublesome as last fall. Many tnx to Connie, Mike and all that make the event work!

W4EDX

EM95nu

	80m	40m
K5CM		7,065,324.00 1,199.23
W8RKO		7,066,301.52 1,198.22
K5CM
W8RKO

Method: IC-7610, 10Mhz GPS Osc, Spectrum Labs SW

Soapbox: K5CM was 59+ with hvy QRN, W8RKO was 57 with QRN and slow fading but both nice signals for the FMT thank you for your efforts and 73's.

W5SSV

EL39ax

	80m	40m
K5CM		7,064,124.80 0.03
W8RKO		7,065,102.80 -0.50
K5CM	3,598,456.20 0.04
W8RKO	3,599,077.00 -0.20

Method: Fan dipole utilizing an HP 3586 in count mode. Also used an Icom 7300 on AM with a Leo Bodner signal generator 1 KHz below mixing with the incoming on air sig. Recorded on the receiver and played back the audio into a frequency counter. Both methods agreed exactly.

Soapbox: Conditions were excellent this go round and coffee and cookies enhanced the enjoyment! Thanks guys for putting this on!

W6DSR

CM88iw

	80m	40m
K5CM		7,064,124.53 -0.24
W8RKO		7,065,102.84 -0.46
K5CM	3,598,456.08 -0.08
W8RKO	3,599,077.07 -0.13

Method: R&S ESH-3 coherent receiver feeding an HP-5370B counter with a GPIB link to the PC running EZGPIB software as controller, and for data collection. Both the receiver and the counter use a GPSDO 10 MHz reference. Data regression was done with Excel on a Windows PC.

Soapbox: Signals on both bands from K5CM put -57 dBm into the receiver's 50 Ohm input. W8RKO's signals on both bands were around -70 dBm. Noise floor was -110 dBm in 200 Hz BW, so good loud signals heard here on the left coast.

I thought it was a bit rude to place the FMT signal at 3599 kHz right on top of a 5-level FSK QSO centered at 3598 kHz, already in progress, especially when there were clear channels on both sides, but it made estimating the frequency more challenging which was nice.

Thanks to both gentlemen for putting up these signals.

W7LUX

DM45dc

	80m	40m
K5CM		7,064,124.73 -0.04
W8RKO		7,065,102.93 -0.37
K5CM	3,598,456.27 0.11
W8RKO	3,599,077.09 -0.11

Method: IC-735 ProII, Z3801, HP3325A

Soapbox: Serious QRM on 3599 kHz from digital station during FMT run.

W7SUA

DM34rs

	80m	40m
K5CM		7,064,124.71 -0.07
W8RKO		7,065,102.85 -0.46
K5CM	3,598,456.10 -0.06
W8RKO	3,599,077.05 -0.15

Method: Used my Elecraft K4D GPSDO stabilized, SigEnt SDG2042X GPSDO stabilized and BG7TBL GPSDO. Used fldigi FMT modem to record measured signals with .WAV file backup. Plotted results and submitted as recorded.

Soapbox: Thanks Connie and Mike for conducting the FMT. Lots of fun as always. 40m signals were very clean. 80m signals had nearby or underneath digital mode signals during the FMT. At least 10 dB below the target signals. Next time will try a different setup. de tom

W8GNM

EN81nn

	80m	40m
K5CM
W8RKO		7,065,102.85 -0.45
K5CM	3,598,456.16 0.00
W8RKO

Method: FlexRadio 6600M locked to external GPSDO with 1Hz dial resolution set to produce ~ 100Hz tone in USB mode. Peak audio frequency measured near 100Hz averaged with Spectrum Lab app that was calibrated with computer clock offset. Audio transport via FlexRadio DAX. Final frequency submitted is dial frequency plus Spectrum Lab measured frequency. Antennas were SW Beverage and S EWE.

Soapbox: Schedule conflict prevented 02:34Z measurement and severe digital QRM at 03:19Z on 3599 contaminated that measurement.

W8TM

EM79te

	80m	40m
K5CM		7,064,124.50 -0.27
W8RKO		7,065,104.00 0.70
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.50 0.30

Method: Elecraft K3 calibrated vs. 10 MHz WWV.

Soapbox: W8RKO very weak on 40M (skipped over), seemed intermittent on 80M.

W9GR

CM99mg

	80m	40m
K5CM		7,064,124.65 -0.12
W8RKO		7,065,103.43 0.13
K5CM	3,598,456.31 0.15
W8RKO	3,599,077.50 0.30

Method: FlexRadio 6500 locked to GPS, Denon digital audio recorder, sampling rate error calibrated out with 2 kHz tone from GPS locked HP3325A generator, homebrew GNU Octave code calculates envelope weighted average frequency.

Soapbox: Thanks to K5CM and W8RKO for another evening of fun. W8RKO on 80 meters was clobbered by digital crud but I was able to filter W8RKO's signal with a 1 Hz BPF in post-processing, which got rid of the digital QRM.

W9INE

DN70gi

	80m	40m
K5CM		7,064,123.78 -0.99
W8RKO		7,065,102.98 -0.32
K5CM	3,598,456.20 0.04
W8RKO	3,599,077.06 -0.14

Method: FLEX-6700 and FLDIGI in Frequency Analysis mode.

Soapbox: All signals were 50 dB for S/N. The W8RKO 80 MTR was 50 dB for S/N and 25 dB for S/S (QRM).

W9ZB

EM69xp

	80m	40m
K5CM		7,064,125.00 0.23
W8RKO		7,065,103.00 -0.30
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.00 -0.20

Method: Icom 706MIIG, Vertical ant, WSJTX in Cal mode, WWV ref.

Soapbox: All sigs strong except 3 MHz from W8RKO, but that sig was usable even with heavy QRM from wide digital sigs. Thanks for a nice FMT.

WA1SXK

EM95lf

	80m	40m
K5CM		7,064,124.16 -0.61
W8RKO		7,065,103.00 -0.30
K5CM	3,598,456.02 -0.14
W8RKO	3,599,077.16 -0.04

Method: IC-7300 using Bodnar GPSDO as a REF. Signal. Record FMT test signal data using FLDIGI in FMT mode. Plot data on charts and view plots to eliminate doppler effects.

Soapbox: No QRM this year and very nice 599 signals on both stations on both bands here on the E. Coast. Noticed more doppler on W8RKO signals. I had static crashes on 80m signals, doppler was less than +- 1hz on FMT signals during the keydowns slight fading mostly on W8RKO. Thank you both for performing the FMT for us. I always look forward to FMT testing to dust off my equipment and refresh my procedures for MMT, Salute to one of the great hams, Mike W9MDB S/K, at Mike's 1-year anniversary, thank you Mike for your FMT training and I miss the ham radio fun we had together. dit dit (EE)
Best of 73 to all, Eric/wa1sxk

WA4EFS

EM94ic

	80m	40m
K5CM		7,064,124.00 -0.77
W8RKO		7,065,103.00 -0.30
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.00 -0.20

Method: Receiver: IC-7300, Antenna: 43ft vertical
Receiver calibration: Homebrew GPS disciplined Frequency Counter
Heterodyne: Homebrew audio frequency counter
Computer: Homebrew application interfacing radio and counters

Soapbox: First time - likely poor results, but ideas are percolating for next FMT.

WA5UCW

DM65sd

	80m	40m
K5CM		7,064,124.75 -0.02
W8RKO		7,065,103.29 -0.01
K5CM	3,598,456.35 0.19
W8RKO	3,599,076.91 -0.29

Method: Used DIY direct conversion receiver, stabilized by Leo Bodnar GPSDO, with horizontal loop antenna. WSJTX and SpecLab to measure and log data, Scilab and Excel to plot and analyze results.

Soapbox: Good signal strengths (S/N ratios 35-55 dB) with minimal short term frequency variation. W8RKO on 40m had 2 frequency components about 0.5 Hz apart. Otherwise, little or no multipath propagation was seen.

I had a difficult time with W8RKO on 80m. Some loud line noise appeared and obscured the signal essentially completely. As a result, my W8RKO 80m result may not be even close.

Great fun as usual. Thanks to Connie, Michael, and ARRL for conducting this event.

WA6TPO

DM44cu

	80m	40m
K5CM		7,064,124.55 -0.22
W8RKO		7,065,103.01 -0.30
K5CM	3,598,456.32 0.16
W8RKO	3,599,077.10 -0.10

Method: Used Fldigi OpMode Frequency Measure. 1) Used Bodnar GPSDO to calibrate FTDX101D VFO error on 80m and 40m by setting VFO 1kHz lower than GPSDO and averaging 1min, calc GPDSO - VFO for rig error. 2) Use GPSDO for nearby reference during runs, measured unknown freq. Add VFO error.

Soapbox: Wonderful exercise, I plan to do it again.

WB4DFW

EM84nr

	80m	40m
K5CM		7,064,124.00 -0.77
W8RKO		7,065,104.00 0.70
K5CM	3,598,458.00 1.84
W8RKO	3,599,079.00 1.80

Method: Kenwood TS-480 HX and WSJT-X v. 3.0.0

Soapbox: Conditions nearly perfect on both bands tonight...sigs 579-599 with no QRM. Was tempted to try to interpolate beyond my 1 Hz resolution but decided to stick with calculated frequencies as displayed.

WB5MJM

DM78or

	80m	40m
K5CM		7,064,125.00 0.23
W8RKO		7,065,103.00 -0.30
K5CM	3,598,456.00 -0.16
W8RKO	3,599,077.00 -0.20

Method: FLEX-1500; GPSDO; End-Fed Long Wire (EFLW)
DSB mode; 40 Hz filter width (+/-20 Hz); PanaScope set to 10s scan; Tune for fewest cycles

Soapbox: This was my second participation in the FMT. I've practiced frequency measuring on many types of signals. Interestingly, some foreign SW stations are not tuned as accurately as American stations to their published frequency.

WB7CAK

CN84jt

	80m	40m
K5CM		7,064,124.50 -0.27
W8RKO		7,065,102.80 -0.50
K5CM	3,598,456.00 -0.16
W8RKO	3,599,076.80 -0.40

Method: Kenwood TS-430 phase-locked to Bodnar GPS reference. 800 Hz sidetone displayed on audio-freqency Vectorscope, tuneable with 1 milliHertz resolution. Vectorscope tuning manually adjusted to produce non-rotating vector...

Soapbox: Considerable ionospheric phase variations observed on signals during 40m runs.

Severe digital QRM on W8RKO 80m run.

WB8ART

EM79vp

	80m	40m
K5CM
W8RKO		7,065,103.00 -0.30
K5CM
W8RKO

Method: K3 not locked but calibrated via a locked signal generator. AF measured by WSJTX

Soapbox: Messed up on K5CM so no entry and was not able to stay for the 80 run.

WB8REI

EN81jc

	80m	40m
K5CM		7,064,124.48 -0.30
W8RKO		7,065,102.83 -0.47
K5CM	3,598,455.98 -0.18
W8RKO	3,599,077.31 0.11

Method: ICOM IC-718, FLDIGI, HP8935, HP and sound card clocks locked to miniGPS referenced clock.

Soapbox: Good signals on both bands. Each year I’ve made adjustments in my procedure. Sometime the results were good, sometime not so good! But I learned something new each time. This year worked on the FMT with a ham who had never done one, hoping to get him hooked! Thanks Connie and Michael for a wonderful time to learn and have fun doing it!

WD8DSB

EM69xx

	80m	40m
K5CM		7,064,124.14 -0.63
W8RKO		7,065,102.64 -0.66
K5CM	3,598,459.26 3.10
W8RKO	3,599,076.44 -0.76

Method: Used SDRPlay RSP1B SDR receiver connected to laptop running HDSDR Software. Calibrated the system using the HDSDR software "LO Frequency Calibration" option using CHU Canada on 7.85 MHz for the 40 meter runs, and CHU Canada on 3.33 MHz for the 80 meter runs. After calibration in ECSS mode with AFC on I switched to CW mode with a bandwidth setting of 50 Hz with the AFC on and video recorded the HDSDR calibration LO Calibration Screen during each session. I then went back and watched each session and wrote down the "current tune frequency" being displayed about every 2 to 3 seconds apart as it was continuously changing due to the AFC being turned on (frequency was changing due to doppler shift caused by the forever changing ionosphere). I then used Excel to obtain the average frequency during each run.

Soapbox: Decided to just use my SDR receiver and HDSDR software calibrated to CHU Canada to see how this very simple setup could do. Due to doppler shift my gut feeling was that my simple system could compete with more sophisticated systems/routines as it's very difficult to predict/compensate for the forever changing doppler shift. Will be interesting to see the final results to see how crazy I was. 73, Don (wd8dsb)

WO7V

CN92eg

	80m	40m
K5CM		7,064,124.43 -0.34
W8RKO		7,065,102.63 -0.67
K5CM	3,598,456.04 -0.12
W8RKO	3,599,076.06 -1.14

Method: Flexradio 6600 using a GPS reference. Fldigi software is using the Frequency analysis mode. Average the keydown samples taken at 1-second intervals using LibreOffice Calc.

Soapbox: S9 signals in the clear except for W8RKO on 80m, which was covered by some other digital mode signal stinking up about 3kHz of bandwidth.

WQ8T

EN74hf

	80m	40m
K5CM		7,064,124.65 -0.12
W8RKO		7,065,103.17 -0.13
K5CM
W8RKO	3,599,077.11 -0.09

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 the 15.625 kHz IF signal from the HP 3586C.

Method:
The RSP1A is used to spot the frequency of the call-up signal and then the HP 3586C is tuned to this frequency. Spectrum Lab is used to determine the frequency of the peak IF signal from the HP 3586C. 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 Spectrum Lab’s continuous calibration using a 10 kHz reference signal, also from the HP 3586C.

Soapbox: I did not copy K5CM on 80M. Other signals were good.

Frequency Measuring Tests

Results - April 17, 2026 FMT