April 7, 2016
Actual Radio Frequencies (Hz):
K5CM/W6OQI All (<=1 Hz):
AA6LK, AB2UW, AE5V, AG2M, K0MZ, K1GGI, K1IG, K1JT, K3JQ, K3KO, K4IVF, K4KJQ, K5CM, K6APW/7, K7HIL, K9KK, KA5QEP, KD2BD, KG6HSQ, KI5EE, KK4KAZ, KM6QX, KN1H, N2GL, N3FG, N3IZN, N6RDR, N6SKM, N7ZO, N8OB, N8OQ, N9CIF, VE2IQ, VE3GSO, VE3OAT, VE3YX, W0GPR, W0HBK, W0PHD, W2FD, W2TX, W3DAD, W4EDX, W4JLE, W4RYF, W4TTU, W4WJ, W5AJ, W5EEG, W5TV, W6OQI, W7GLF, W7PUA, W8PHB, W8TM, W9GR, W9INE, W9TJ, W9ZB, WA1ABI, WA2DVU, WA9VEZ, WA9VNJ, WB0LXZ, WB8TFV, WX4TW
K5CM 80 (<=1 Hz):
AA6LK, AB2UW, AB4RS, AE5V, AG2M, AJ4YA, K0BT, K0MZ, K0WM, K1GGI, K1IG, K1JT, K3JQ, K3KO, K4CXX, K4IVF, K4KJQ, K5CM, K6APW/7, K6IQL, K7DR, K7HIL, K8DJR, K9KK, KA5QEP, KB0EW, KC8IMB, KC9NBV, KD2BD, KD5MMM, KG0HY, KG6HSQ, KI5EE, KK4KAZ, KK6PTR, KM6QX, KN1H, N2GL, N3FG, N3IZN, N5DM, N6RDR, N6SKM, N7ZO, N8OB, N8OQ, N9CIF, N9XR, SV8QG, VE2IQ, VE3GSO, VE3OAT, VE3YX, W0GPR, W0HBK, W0PHD, W1GIV, W1KU, W2FD, W2TX, W3DAD, W4EDX, W4JLE, W4RYF, W4TTU, W4WJ, W5AJ, W5EEG, W5TV, W6BM, W6OQI, W7GLF, W7PUA, W8PHB, W8TM, W9GR, W9INE, W9TJ, W9ZB, WA1ABI, WA2DVU, WA7KMR, WA9VEZ, WA9VNJ, WB0LXZ, WB6HYD, WB8TFV, WD6DOD, WX4TW
K5CM 80 (>1 to <=5 Hz):
K6PO, KZ3X, N1BC, W0LEZ, W3SA
K5CM 80 (>5 to <=10 Hz):
K0TNT, KK7YW, N9XGC
K5CM 80 (>10 Hz):
AE5P, N3CRM, N5LUL, VE9DAN, W3JW, W8NN, WA4FJC, WB3JFS, WB5UAA
K5CM 40 (<=1 Hz):
AA6LK, AB2UW, AB4RS, AE5V, AG2M, K0MZ, K0WM, K1GGI, K1IG, K1JT, K3JQ, K3KO, K4CXX, K4IVF, K4KJQ, K5CM, K6APW/7, K7DR, K7HIL, K8DJR, K9KK, KA5QEP, KB0EW, KD2BD, KG0HY, KG6HSQ, KI5EE, KK4KAZ, KM6QX, KN1H, KU4PY, KZ3X, N2GL, N3FG, N3IZN, N4AU, N5DM, N6RDR, N6SKM, N7ZO, N8OB, N8OQ, N9CIF, N9XR, SV1XV, SV8QG, VE2IQ, VE3GSO, VE3OAT, VE3YX, W0GPR, W0HBK, W0LEZ, W0PHD, W1GIV, W1KU, W2FD, W2TX, W3DAD, W3JW, W3SA, W4EDX, W4JLE, W4RYF, W4TTU, W4WJ, W5AJ, W5EEG, W5TV, W6BM, W6OQI, W7GLF, W7PUA, W8PHB, W8TM, W9GR, W9INE, W9TJ, W9ZB, WA1ABI, WA2DVU, WA4FJC, WA7KMR, WA9VEZ, WA9VNJ, WB0LXZ, WB6HYD, WB8TFV, WD6DOD, WX4TW
K5CM 40 (>1 to <=5 Hz):
AG6JA, AJ4YA, K6PO, KC8IMB, KC9NBV, KD5MMM, KK6PTR, KK7YW, N1BC, W4SWQ, WB5CTQ
K5CM 40 (>5 to <=10 Hz):
K5CM 40 (>10 Hz):
AE5P, K0BT, K6IQL, N5LUL, N9XGC, VE9DAN, WB3JFS, WB5UAA
W6OQI 20 (<=1 Hz):
7L4IOU, AA6LK, AB2UW, AE5V, AG2M, K0MZ, K1GGI, K1IG, K1JT, K3JQ, K3KO, K4IVF, K4KJQ, K5CM, K6APW/7, K6IQL, K7HIL, K9KK, KA5QEP, KD2BD, KG6HSQ, KI5EE, KK4KAZ, KM6QX, KN1H, KU4PY, KZ3X, N2GL, N3FG, N3IZN, N4AU, N6RDR, N6SKM, N7ZO, N8OB, N8OQ, N9CIF, VE2IQ, VE3GSO, VE3OAT, VE3YX, W0GPR, W0HBK, W0PHD, W1MK, W2FD, W2TX, W3DAD, W3JW, W3SA, W4EDX, W4JLE, W4RYF, W4TTU, W4WJ, W5AJ, W5EEG, W5TV, W6OQI, W7GLF, W7PUA, W8PHB, W8TM, W9GR, W9INE, W9TJ, W9ZB, WA1ABI, WA2DVU, WA9VEZ, WA9VNJ, WB0LXZ, WB8TFV, WX4TW
W6OQI 20 (>1 to <=5 Hz):
K8DJR, KC9NBV, KD5MMM, KG0HY, KK6PTR, N5DM, W0LEZ, W1GIV, W1KU, WA7KMR, WB6HYD
W6OQI 20 (>5 to <=10 Hz):
AB4RS, AJ4YA, K0TNT, KK7YW, WA4FJC
W6OQI 20 (>10 Hz):
AE5P, K0BT, N1BC, N3CRM, N5LUL, N9XGC, N9XR, VE9DAN, WB3JFS, WB5UAA
Result Details (n=114):
|Method: IC-7200, SpectrumLab, HP 8648A|
Soapbox: Thank you for beaming to JA. 73 Hisami
|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, Vista laptop running SpecLab, DigiPan for spotting, EZGPIB controlling Prologix USB-GPIB to set up and interrogate instruments, GPSCon for monitoring Z3805A; the 2019 was set to inject a reference beat signal to produce a ~400Hz beat tone, and the 3325A was tuned for minimum phase slip between it and the beat tone. Each run was recorded to a .wav file through SpecLab, and at a later time replayed to export data to spreadsheet to refine submission numbers.|
Soapbox: Thanks Marvin and Connie for running the test. I had terrible power line noise from PG&E on 20M but was able to find the signal on the spectrum displays; did not note much difference between signals beamed East vs. West; 40M/80M signals were strong with the usual amount (~0.8Hz) of spreading. 73, L
|Method: 98' long W5GI dipole oriented E-W connected to Icom IC-7000; SignaLink interface to laptop running Spectrum Lab. After key down period, switched radio input to HP 3335A frequency synthesizer output (through 100 dB of attenuation). Thunderbolt GPSDO 10 MHz reference signal was fed into the external reference input of the 3335A. Tuned the synthesizer to match the appearance of the key-down signal on the Spectrum Lab waterfall display.|
Soapbox: Notification of the FMT was too late and too hard to find - Put it on the ARRL home page EARLY! Was posted on a 'buried' ARRL web page on 4/5/16 for the 4/6/16 FMT! 20m signal level at the radio input was about -95 to -105 dBm (noticeable QSB). When beaming to Japan, signal level dropped to -115 to -120 dBm. 40m signal was steady and strong, about -93 dBm. 80m signal also strong, slight QSB -93 to -98 dBm.
|Method: Used a Trimble Thunderbolt GPSDO as a frequency reference. Received the signal using the HP3586B Selective Level Meter, locked to the 10 MHz reference. Recorded the 15625 Hz IF signal from the HP3586 and analyzed it using Spectrum Lab. Used the HP3336C, locked to the 10 MHz reference to generate a reference signal to correct for sound card sampling rate error.|
Soapbox: The 20m signal was right at the noise level, but Spectrum Lab was able t detect and process it. The 40m (67 dBm) and 80m (71 dBm) signals were nice and loud into Northern Virginia. Fun as always.
|Method: Flex 6700 with FLDigi|
Soapbox: Is it possible to get earlier information posted on upcoming FMT's, especially via the ARRL web site and/or ARRL newsletter? Many thanks to K5CM and W6OQI for putting these events on the air.
|Method: SDR Receiver
Spectrum Lab Peak
Soapbox: Trying yet another new method this year. Had to resubmit data after problem with web page freq changed. No longer had spreadsheet of clean data, only a yellow pad with bits and pieces of numbers scattered. Hope I got close. Always fun.
|Method: Yaesu FT-950 into old Dell Inspiron notebook computer running Spectrum Lab|
Soapbox: QRN moderate to severe at times. Thanks to Connie, W6OQI, and ARRL for continuing to provide this challenging endeavor.
|Method: SoftRock Ensemble RXTX, HDSDR in CW mode|
Soapbox: First try at this.
|Method: Flex 1500 and Ten Tec 539, 40m/20m fan dipole. visual estimation on Flex waterfall, audio estimate with Ten Tec (+/- 10Hz)|
Soapbox: Just one part of Amateur Radio I look forward to, and enjoy. Thanks
|Method: TS-590S with SoftRock Ensemble III as panadapter, calibrated to a GPSDO-disciplined IFR-1200S. HDSDR zoomed in to read the frequency.|
Soapbox: First attempt at the FMT. I hope to have a better method ready for next time.
|Method: Atlas 210X receiver, TR-7 transfer oscillator, Heath IM-4100 counter clocked with Hp 10544A OCXO. I tune the transfer oscillator to the FMT signal by ear and the counter measures the matched frequency.|
Soapbox: Thank you Marvin and Connie for a fun FMT. 20M signals beamed East were 40 over S9 fading to S4 in Kansas while the West signals were S4 fading to S3. 40 M signal was weak S9 fading to S5 and the 80M signal was very strong 40 over S9 with a lot of QRN.
|Method: Flex Radio 3000, PowerSDR 2.72 KE9NS rev. S7, sample rate set to 48,000.|
Soapbox: Surprisingly good signals from both stations to my five band fan dipole in my attic.
|Method: Yaesu FT-1000 MP Mark V + 40 meter dipole|
Soapbox: Remarkably strong, stable signal on 40 meters, good signal on 80 meters, no signal on 20 meters.
|Method: Heterodyne with LO referenced to GPS, detect beat with SpectrumLab.|
Soapbox: Tnx to the organizers, always fun.
|Method: K3, FLDigi, and MacBook Pro. Made two minute WWV measurements before and after each signal measurement and averaged to get applied offset. Graphed two minute signals at one second intervals and averaged.|
Soapbox: First 20 meter signal was about S2-S3, but very stable. Unable to detect second 20 meter signal. 40 and 80 meter signals were very loud. Band conditions in the afternoon were terrible, but improved greatly after dark; this is the first FMT in over a year that I've been able to hear all three signals.
|Method: TS-2000X with WSPR "fmtest" tools.|
Soapbox: W6OQI antenna has good directivity: signal was inaudible when he turned toward JA. My software measured its frequency anyway: 14121544.836 Hz, about 0.9 Hz lower than when he was beaming east. No estimates or corrections for Doppler shifts have been applied. I simply report frequency measurements of the signals "as received". Estimated uncertainties are around 0.3 Hz for each signal.
|Method: Equipment used:
HP 3586B Selective Level Meter, Trimble Thunderbolt GPS Receiver, Spectrum Lab FFT Program running on Windows 7 PC, SoundBlaster Sound Card. Antenna: Carolina Windom 80 Short, 60 feet high.
HP 3586B locked to Thunderbolt GPS Receiver. Audio output of 3586B fed to line-in of sound card. Sound card audio recorded by Spectrum Lab starting with 10 MHz WWV at 22:10 EDT, W6OQI at 22:15, 15 MHz WWV at 22:31, 10 MHz WWV at 22:35, 5 MHz WWV at 22:40, K5CM 40m at 22:45, 5 MHz WWV at 22:54, 2.5 MHz WWV at 22:57, K5CM 80m at 23:00, 2.5 MHz WWV at 23:08, 5 MHz WWV at 23:11.
During this session, I located each FMT transmission to within a few Hz aurally and visually with Spectrum Lab (FFT set to decimate by 4, Hann window 8192), set the 3586B 20 Hz filter, and recorded the frequency setting of the 3586B.
Next day, analyzed the Spectrum Lab wav file (decimate by 4, Hann window 131072), exported results to Microsof Excel, calculated frequencies, standard deviations with Excel functions using measured WWV signals for comparison.|
Soapbox: Average signal levels: (as recorded in Spectrum Lab. These do not correspond to actual received signal power so only relative values significant) W6OQI-> east: -34 dB w6OQI-> Japan: -45 dB K5CM 40m: -18 dB K5CM 80m: -16 dB WWV: -16 to -18 dB depending on frequency I'm on the east coast, so W6OQI signal with beam toward Japan was 11 dB weaker than with beam toward east coast. Even that signal was about 17 dB weaker than that of K5CM. W6OQI -> Japan would have been pretty much in the noise, except for the 20 Hz filter on the 3586B. Measured W6OQI->east frequency was 14,121,545.29 Hz with estimated error of 0.12 Hz. Measured W6OQI->Japan frequency was 14,121,545.03 Hz with estimated error of 0.46 Hz. K5CM 40m: 7,055,773.446 Hz, estimated error: 0.08 Hz K5CM 80m: 3,598,357.191 Hz, estimated error: 0.06 Hz The estimated errors are based only on the spread of Spectrum Lab FFT analysis of measurements of the FMT frequencies. They don't account for errors in measurement of the WWV frequencies used for baseline or for "Operator Error".
|Method: Pitch difference between unknown and known reference oscillator determined. Known=HP8657B locked to Rb standard. Two radios: A K3 with new synthesizer boards and a TS-480. Both radios used the same antennas and sent audio to SpectrumLab. SL processed both simultaneously and output the data to a file. EZGPIB collected extra data. DPLOT analyzed.|
Soapbox: Thanks to both K5CM and W6OQI for the FMT. W6OQI's 20M signal was barely above the noise for first run and in and out of the noise when he beamed to Asia. Maybe a 0.1 - 0.2 Hz difference between the two. A lot of multipath/Doppler. Not expecting a good result. K5CM was above S9 on 40M and S7 on 80M. Happily the two radios produced the same results within 10 milliHz on all bands-- however inaccurate that may be.
|Method: Communications grade receiver, and a synthesizer for frequency comparison checked against WWV-10 that is capable of tenth-Hertz precision. Used "Double Carrier Heterodyne Technique" for aurally zero-beating incoming signal with synthesizer output, with similar synthesizer signal amplitude into receiver as the unknown frequency.|
Soapbox: Heard 20 meter signal from CA only momentarily. Signal levels on 40 and 80 from K5CM in OK were good. Thanks to all who organized this.
|Method: Reference signal from a phase-locked source coupled into a receiver. Spectrum Labs software used to measure the difference between the reference and unknown signals.|
|Method: Homebrew RX with PTS synthesizer Local Osc.
Another hombrew RX to monitor WWV|
Soapbox: Doppler shift is always unpredictable except that signals are typically shifted low at this time of night. Observed some weak multipath signals.
|Method: TX Antennas:160m vertical (almost). 80 meter dipole slopping down from a 80' tower. 40 meter dipole between two 80' towers, 4 element SteppIR. For RX I use an FT-1000D in AM mode with a PTS-250 for low side injection. Audio is feed to SpectrumLab. Other RX antennas include three 500' Beverage|
Soapbox: Conditions were good for this FMT. Marvin's 20 meter signal was strong when he was beaming East and easy copy off the back when beaming toward JA. For transmitting the FMT I use an HP-Z3801 GPS frequency source which clocks a HP-3336b or a PTS-250. This feeds a 10 db transistor amp which drives a 12by7 / pair of 6146. The final amp runs about 400 watts. There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the GPS frequency source. I verify the accuracy of the TX system with a totaly separate RX system 73, Connie, K5CM
|Method: TenTec receiver characterized to WWV and CHU, audio beat of offset with digital audio oscillator through audio hybrid combiner. Apply corrections.|
Soapbox: East beaming W6OQI S1 to S2, NW beaming S3, but all right in the middle of a TV oscillator emission. Forty meter K5CM S9 and eighty meter S7 signals. Thanks to all who made this happen.
|Method: Used Audio beat method. RF reference was home brew DDS synthesizer clocked by RB clock and verified against multiple T-bolts. Antenna was home brew small magnetic loop. Receiver was QSR1 but no attempt made to clock externally as this method does not depend upon receiver stability.Audio processed by Spectrum Lab which output 1 measurement per second to a text file. Excel graphing and Mark 1 A1 eyeball for final processing.|
Soapbox: Signals marginal on 20 and 40 M but very strong on 80. All were usable however. Great fun as always. Used signals to investigate some other methods that may prove useful in future FMTs. Meantime there are always WWV and CHU to practice with. Thanks agian to K5CM and W6OQI. 73 to all John K6IQL Spring Hill KS
|Method: ICOM IC-7200 with K1JT's FMT tools, using WWV and CHU as references.|
Soapbox: Unfortunately W6OQI's 20m signal was inaudible here.
|Method: HDSR using RTL Dongle calibrated against CHU Canada|
Soapbox: First attempt using just SDR to measure. Copied signal on 20 but signal was very weak in MI. K5CM had very good signals on 80 and 40.
|Method: Icom IC 756 Pro III calibrated to WWV with interpolation for range. Beat frequency matched to I-Phone audio frequency generator app.|
|Method: GPS reference signal.|
Soapbox: Very Good signals from both W6OQI and K5CM. It was Fun. Thanks !!
|Method: Harris RF-590 clocked with vintage Austron master crystal oscillator, and HP 3561A signal analyzer. Signals were tuned with the 590 to about 10 Hz accuracy, then the signal analyzer was used to get remaining part.|
Soapbox: 20 meters was excellent. Both east and west signals were at the same frequency. West signals slightly weaker. 40 and 80 had some static, but signals were easily measured. Good test.
|Method: RF generator using external oscillator locked to GPS disciplined oscillator. RF generator tuned to provide a hetrodyne tone which was received and measured in spectrum lab software then added to the RF generator frequency.|
Soapbox: No 20 meter signal. Thanks for the test.
|Method: Yaesu FT-950 using FLDIGI in Frequency Analysis mode. Measured against WWV.|
Soapbox: Thanks to everyone on another interesting FMT. 40 was S9+ and almost no doppler. 80M, S7 with noticeable atmospherics. 73!
|Method: Flex 3000, Spectrum Lab V2.90 b2|
|Method: All homebrew equipment including a carrier phase tracking receiver, WWVB referenced frequency standard, and frequency counter. An end fed 43 foot long horizontal wire antenna was used on 20 and 40 meters, while a vertically polarized H-field loop was used on 80. Method involved phase locking the receiver's LO to the frequency of the unknown carrier minus a 1 kHz offset, measuring the frequency of the receiver's LO over several 10 second integration periods, and taking a "selective average" of the readings after factoring in the 1 kHz offset. 20-meter readings were made using an SA612 to mix the incoming signal with the frequency standard's 10 MHz LO, and then measuring the 4 MHz IF as described above. Details of my methodology are available at: http://www.qsl.net/kd2bd/fmt-methodology.html. Details of my frequency standard are available in the Nov/Dec 2015 issue of QEX.|
Soapbox: A Kp index of 1 helped keep amplitude and phase perturbations to a minimum. On 20, W6OQI was strongest during the call-up, and slowly faded into the noise as his carrier frequency rose nearly 1 Hz toward the end of the keydown period. On 40, K5CM was VERY strong and VERY stable, exhibiting only 0.15 Hz peak-to-peak deviation. On 80, K5CM was moderately strong, and exhibited 0.2875 Hz peak-to-peak deviation. Signals levels improved toward the end of the keydown period. Therefore, I would rank my 40 meter reading as probably my best, followed by 80 and 20. TNX and GL to all. 73.000 de John, KD2BD
|Method: FT847, Signalink, & Speclab. CHU used for reference.|
Soapbox: 20m was weak here, good sig on 40m & 80m. Hope I'm close. 73
|Method: Power-up Windows 2000, with WinRadio G313, at 00:00Z. Used CHU, WWV, and my 1 MHz standard, for calibration. For 20M, used HF Yagi. Used my attic amplified shielded loop, for 40M and 80M.|
Soapbox: Good signals, for this FMT. I could hear, W6OQI signal to Japan and North Pacific, but was down to -137dB, to weak for FMT. Casey KG0HY
|Method: HP 3586C, Spectrum Lab|
Soapbox: 20M off of side of beam, and short for W6OQI. -110 DBm
|Method: Kenwood TS-2000 and Spectrum Lab|
Soapbox: Kenwood TS-2000 internal fan will cycle ON and OFF even at normal room temperature. When the fan turns ON, the frequency will change a couple of hertz. So I had to cool the radio room down so that the internal fan would not cycle ON.
|Method: Used Symetricom 58534A GPS antenna w/ 1PPS and Efratom OCXO, home brew interface, digital counter (for 10MHz lock), and associated control logic for GPSDO, Spectrum Lab,and spreadsheets for accurate guestimations. For each run, record Pre-CAL of unlocked Icom R75 Receiver @ 10 MHz, Call Up and Xmt, and Post-CAL. Spreadsheet accounts for Rcvr drift between CALs, and estimated Freq is computed with correction for uncalibrated Rcvr. With unlocked OCXO in Rcvr, drift is fairly low, and resulting Freq calc fairly accurate.|
Soapbox: 20m East was very weak, and freq area was partially guessed with a peak was barely showing. 20m West was weaker, but with range from 20m East, it was still just trackable. 40m had a strong nearby signal which screwed up my Spectrum Lab settings, and it took until the Transmit to lock into the right peak for an accurate Freq, but low Freq spread. 80m had as much as 1 Hz spread.
|Method: Yaesu FT-991 with HP Windows PC & Spectrum Lab|
Soapbox: Thanks to K5CM, W6OQI & Bruce for putting this on.
|Method: Flex Radio 6500, XC-LO GPSDO Jackson Labs, FLDIGI, 25' vertical wire/SG230 tuner at base|
Soapbox: First time into the FMT, not sure I used FLDIGI properly, results will be interesting to see. 20M - heard both W & E at about the same level but much weaker than 40M or 80M. 80M sure is a messy band at night!
|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: 20m signal was just above -107dBm noise floor. Used Pixel loop aimed at LA since W6OQI is exactly off end of my dipole (333mi). 40m and 80m were 30+dB over noise floor. I found a new way to screw-up; 'SAVING' to an existing wav file, instead of playing it, will erase it. Doh!
|Method: IC-7200 and Spectrum Lab. Left radio and computer running for 2 days, then made corrections using nearest WWV for each band.|
Soapbox: Thanks for another fun event. Conditions were good, low noise, no QRM. K5CM S9+10db on both bands, W6OQI S7 on 20. Did not hear 20M transmission to Asia.
|Method: IC756pro, Speclab and Commander.|
Soapbox: Chased off by lightening on the 80m run.
|Method: I used a Yaesu FT-857D with optional TCXO installed and Spectrum Lab software on a Gateway laptop running Win 7 and I5 processor. Antenna for 80 and 40 meters is a 255 ft inverted vee 35 ft at the apex with a tuner. A Mosley tribander on a lowered tower at 30 feet was used on 20 meters.|
Soapbox: I just installed the Spectrum Lab software two days ahead of the test after reading a April 2015 QST article. Just getting the hang of all of the features and thought I would give it a try. The 20 meter signal was about S1 to the east and I could still hear the west test above the noise. The 40 and 20 meter signals were S9 +10. Not expecting much as I didn't have much time to tweak the software as much I would have liked, but I can use this run as a benchmark for the future tests. Thank You to W6OQI and K5CM for the time they put into this FMT.
|Method: FT857 / Spectrum Lab on Dell laptop / Windows XP
antenna is unsymmetrical dipole about 18 feet high
calibrated using WWV upper sidebands 500Hz and 600Hz|
Soapbox: Signals were very readable from both stations.
|Method: HP33586A Signal Level Meter and HP335A synthesizer GPS locked. Sidetone compared to synthesizer as a lisajous. Propagation variation seems to be about +/- 0.2 Hz.|
Soapbox: Thanks for the test!
|Method: Just checking my simple equipment|
Soapbox: Thanks for all you do.
|Method: K3, Spectran, WWV, CHU, 40M dipole. Tuned for a 700+/- Hz tone. Measured the audio frequency with Spectran. Established a correction factor with WWV and CHU.|
Soapbox: Sigs in EPA pretty good. A little noisey on 80M, but not bad. Thanks again for a FB event. Well done.
|Method: Kenwood TS-50, my back up rig.|
Soapbox: On 20 meters, frequency dropped .74 Hz when antenna direction changed. Coin flipped that one. Solid copy on 40 and QRM on 80 but copy-able.
|Method: Kenwood TS570 with Speclab and spreadsheet.|
Soapbox: Missed the 80M run due to Thunderstorm. Had to disconnect. The 20M and 40M signals were good here. Slight Doppler on the reference frequencies. I used WWV on 10MHz and CHU on 7.85MHZ. I didn't get a good reading on the 20M West signal.
|Method: FT-3000D and Digipan. Yagi and dipoles.|
Soapbox: Thanks to W6OQI and K5CM.
|Method: Yaseu FT-920 + error correction from past tests.|
Soapbox: Only had a good copy on the 80M signal... the others are just lucky I hope.
|Method: I used Joe Taylor's (K1JT) excellent FMT tools. No GPSDO. No TXCO. No scope. Just an old radio, and old laptop, and an old operator. I can't say enough about the contributions Joe Taylor has made to ham radio. Ham radio is enjoyable again.|
|Method: Fldigi in frequency analysis mode, fed by an FT-857D with a GPSDO.|
Soapbox: Thanks for a great test, which became especially exciting when I discovered that my computer wasn't getting any signal from the Signalink, with only a few minutes to go until the start of the test!!! (I had knocked a cable partially out of the FT857D.) Fldigi on MacOs 10.6.8 was fed by a SignaLink USB, attached to a Yaesu FT-857D, using a Boni-whip (on 40m and 80m) or an MFJ magnetic loop (on 20m). 80 and 40 meters were both reading S8, while 20 meters was the same S3 for both east and west. If I hadn't known that the same transmitter was running the east and west tests, I'd had thought that they were on two different frequencies! East varied from 5.39 to 5.63, while west changed from 4.99 to 5.30. (I chose to report the west value.) Notice that the two frequency ranges don't overlap, even though both were quite strong. Since both W6OQI and I are in California, and the sun was just setting, I may have been hearing reflections from some sort of ionospheric waves, one wave moving toward the two of us and one away. Whatever happened, this entire test was very challenging as all frequencies were continually moving around over a roughly 0.25 hertz range. Thanks again for another interesting evening.
|Method: Received with a 280 foot horizontal loop at about 25 feet feeding a FlexRadio 6700 with GPSDO and with filters set about 100Hz wide. Data was recorded to a csv file from Fldigi running in the frequency analysis mode. Also was simultaneously running a second copy of Fldigi tuned to WWV (10MHz for the 20m test, since WWV on 15 was very weak, and 5MHz for the 40 and 80m tests). I averaged the Fldigi data in a spreadsheet.
I was also running Spectrum Lab analysis and wavefile recording for backup but did not use this data other than checking that it was consistent with the Fldigi data.
The Doppler shift from the WWV data is obviously from a different propagation path. I believe that it shows the correct bias for the frequency and the time of day, but the actual numbers are inaccurate, so I chose to apply only part of the Doppler correction.|
Soapbox: This is my first ARRL FMT, but I have participated casually in a few of Connie’s practice FMT’s before. The FlexRadio 6700 reports its frequency to the nearest Hertz (which is fine for normal use) but has some small undefined frequency offsets due to its internal math. More importantly, from my testing (with a GPSDO locked Rigol DG4162 waveform generator), I have found that these offsets are not predictable and depend on the VFO history. The worst case I have seen is around -60 mHz and +10 mHz, but my testing has not been exhaustive. Next time I will measure the actual offsets during the FMT. For this test, I ignored them. (Someday Flex may be able to report a few more digits of precision through its API or report an offset number to correct with. I hope Steve, N5AC, reads this.) From Oregon, the 20m signal was very weak on both of W6OQI’s beam settings. Interestingly, my measurement for the JA/North Pacific path was about 200 mHz lower. My sincere thanks to Connie, K5CM, Marvin, W6OQI, and the others involved for this learning opportunity. – Bob, N7ZO
|Method: Flex 6300 and Spectrum Lab|
Soapbox: Signals were decent. Lots of fun as usual
|Method: Elecraft K3 + G3RUH GPSDO + 93m Horiz. loop up 14m
Soapbox: On 20m there was a significant difference in signal structure between beaming directions, double cores. Centroid estimates were about a half-Hz different. I reported the beam east estimate. Beaming west had more spread and still had two cores. 40m also had double cores. On 80m there was significant core Doppler variability and an asymmetric spread. 20m +15-dB SNR, 40m +50-dB SNR, and 80m +45-dB SNR.
|Method: Icom IC-7200 with vertical antenna calibrated against WWV and CHU.|
Soapbox: Strong signals for the most part. The 20m signal was barely perceptible when aimed west.
|Method: Computer program|
|Method: FT 840|
Soapbox: Gave it a try.
|Method: Icom IC-706 MkII tranceiver calibrated against CHU (7850 kHz) and RWM (4996 kHz). Dipole antenna.|
Soapbox: I decided to participate only 30 min before the test, so I was unable to warm up and stabilize the receiver PLL sufficiently. Estimated uncertainty about +/-2.5 Hz.
|Method: I used my trusty setup FLEX-1500 locked to GPS Timing receiver, Spectran to locate the signal and this time I had added Argo for data acquisition. CHU for Doppler correction|
Soapbox: Strong and clear signal from K5CM on 40 m, weak -103 DBm but readable on 80 m. The 20 m band was dead, CHU 14.670 unreadable not a single trace for hours. Fun as always.
|Method: Dipole > TS-850 CW-500Hz-BW > record audio output. Measure audio frequency, correct for known errors. RF = fdial + audio_out - 800.0 + offset. Rx clocked by OCXO monitored with GPS.|
Soapbox: 20M: no S-meter deflection but low noise so good copy both directions. Beaming west measured 0.8 Hz lower than east! Submitting eastward sig because better std. dev. and expect -Dopp at that time of day. 40M: S9 with no QRM. 80M: S9+20dB with no QRM. Tnx K5CM & W6OQI.
|Method: Spectrum Lab on an old P4, and FT-950 with the frequency error reasonably well plotted, as per QST April 2015.|
Soapbox: 20m signals reasonably strong at S7 with some frequency shift during the run. The western run was down in the noise and spread about 2Hz wide. The 40m run nice and strong, and was right above a Canadian SSB net, so tight DSB filter used. 80m signal S9+20, so attennuators on.
|Method: Using the "AM receiver" method. Sig generator is HP3325B, ref'd to an HP Z3801 GPSDO, with SpectrumLab software to measure the audio beatnote in the receiver audio. Works well in most situations, except that there is no control over the receiver's AM bandwidth in my "modern" transceiver.|
Soapbox: Wow. Almost no signal at all from K6OQI on 20m. Never did copy his callsign but got "QS" twice, and got about one minute of key-down data in SL. Nil for his western beam. K5CM was booming on 40m but suffered from local SSB QRM on 80m. No doubt Mr Murphy and Dr Doppler will have their way again. Thanks for this test.
|Method: TS870S and Fldigi|
Soapbox: 20 M signals were very weak, S0 and the West signal was only a little weaker than the East. The shack temperature was changing making calibration a nightmare. TNX Connie.
Soapbox: Nice sigs into east coast from W6OQI and K5CM ... that was a blessing.
|Method: Flex 3000 using simultaneous observations and measurements with the K1JT WSPR FMT utility and FLDigi Frequency Analysis tool. I allowed the system to warm up for ~30 hours and tested the stability throughout.|
Soapbox: Thank you for hosting the FMT. As my first time I learned a lot and look forward to improving my station, technique/methodology, and documentation of band conditions
|Method: Yaesu FT-920 with TCXO. Direct frequency measurement.|
Soapbox: W6OQI East beam heading 20db stronger than West. Frequencies measured same both directions. Thanks to W6OQI and K5CM for sponsoring the test again.
|Method: Using a K3 with the new synthesizer, Spectrum Lab software and an old computer using Vista.|
Soapbox: This was my first try for the FMT. It was an interesting challenge and I plan to do it again. I'm going to have to study up on the Spectrum Lab and sound cards before the next FMT. Signal on 20M was about S7 with my attic antenna. Was able to get an identical reading when beamed west although was about the S3 noise level. Thanks to K5CM and W6OQI.
|Method: Z3801 to phase lock Singer CSM-1 IC756 pro and spectrum lab program
to measure the audio tone difference between the unknown frequency and the selected "standard" at closest 100 Hz signal from CSM-1|
Soapbox: W6OQI strong when pointed east and submitted not useable when aimed at JAs. K5CM strong signals with more multipath phase shifting on 80 then on 40. was really frustrated with rejection of entries.
|Method: 550' low horizontal loop. Softrock ensemble RX II. E-MU 0204 USB soundcard sampling @ 192KHz with I/Q inputs procesed by HDSDR (calibrated to wwv) and then 48 KHz sent to spectrum Lab. 16K FFT length with divisor of 16; average over 2 minute keydown. Offsets added for errors estimated from CHU tones right before FMT. 20 meters west signal faint but measurable and seemed about 0.2 Hz higher; all others very good copy.|
Soapbox: Third participation in FMT. No high accuracy equipment. Hope to do better next time.
|Method: K3/P3 , nothing external. no computer, 10 min warm up|
Soapbox: would be nice if the p3 had a narrower span, am sure I could have done better with a min span of +/- 100 Hz instead of +/- 1 KHz
|Method: Kenwood TS-450 using CW Normal and Reverse modes to measure the near 600 Hz. offset using Lissajous Figure and frequency counter. WWV 15 MHz. used for receiver calibration.|
Soapbox: Thanks Connie and Marvin for another good FMT. East pointing 20 meter signal was weak but very readable. West pointing beam transmission very weak here with difficulty measuring frequency for that test. 40 and 80 meter signals very strong although conditions were somewhat noisy.
|Method: RF-590 locked to T-Bolt. Spectrum Lab SW with soundcard cal'd with tone derived from GPSDO output. 20M inv-V at 50 ft.; 64 ft. vertical tuned on 40M and resonant on 80M.|
Soapbox: 20M signal was barely audible during call-up, then faded further with the energy spread over 1/2 Hz. 40M signal was 1-5 uV spread over 0.4 Hz. 80M signal was 0.5 to 1 uV spread over 0.8 Hz.
|Method: OCXO controlled TCXO/K3. Using LSB offset dial +xxxHz to get a beat note, then use Spectrum Lab to read the beat note peak value. Record and take average over 2 minutes key down. Then use math to find the actual transmit frequency. Calibrate using WWV and CHU with a 500Hz offset and record difference with Spectrum Lab values to create correction graph.|
Soapbox: 20 Meter signal was very weak here in Maryland (FM19)and sometimes fell below the noise. 40 and 80 Meter signals very strong with minimum QRM. I do enjoy this event and find it to be a learning experience each time. 73, Kevin/W3DAD
|Method: Icom 7800 locked to GPSDO; into Spectrum Lab.|
Soapbox: The 20 meter signal was at the noise floor (beam east) and not heard with NW direction. The 40 M signal was the strongest, reading S9+10dB. The 80 M signal registered S9+5 dB. Doppler and multipath "did not disappoint"-- particularly on 40 and 80 meters. Tnx to Connie et al.
|Method: Yeas FTdx-3000, SpecLab|
Soapbox: 20mtr sig S3 just above the noise with cream 1, 40 & 80mtr sigs S-9+5 no preamp.
|Method: IC-7700, Spectrum Labs, HP computer, SignaLink USB|
Soapbox: W6OQI beaming East RST 459, Beaming West RST 339. K5CM RST 599 on 40 and 80.
|Method: Icom 7100 and FLDIGI First time using this combination. processor division errors required a linear regression to correct. Now if I just got the math right...|
Soapbox: Good signals from all stations. Multipath on 80 made it a bit tougher. Frequency on 20 beaming west .07 Hz higher.
|Method: ICOM-7600 in CW mode, with BFO tone at 900Hz, using 300 ft.horizontal loop ant on 80 and 40 M frequencies and dipole ant for 20 M test. Ran audio out through Signal Link with MixW s/w running in BPSK mode. Used waterfall on Icom-7600 to initially identify signals (rough frequency estimate) and waterfall display on MixW to calibrate frequency, measuring difference between marked tone and 900Hz BFO reference tone. Checked calibration of system (BFO) against CHU and WWV before and after each test transmission.|
Soapbox: Thank you W6OQI and K5CM for providing the watts. I enjoyed the drill. Signals were good here in Western North Carolina except the 20 M JA test. Haven't participated in this test in a while, hope I got the math right this time. . '73 w4ryf
|Method: Funcube Pro into SDR Sharp, connected to an 80M Carolina Windom.
Checked for frequency correction with WWV @ 10 and 15 Mhz. Applied a +2.2 ppm correction to center the signal.|
Soapbox: Only able to copy the 7 Mhz signal. Started on the 14Mhz signal, but a a Japanese commercial station popped up over it.
|Method: ICOM IC-7200 with FLDIGI|
Lucent/Symmetricom Z3810AS GPS Receiver
Racal 6790/GM General Coverage Receiver
Tunable in steps of 1000Hz, 30Hz or 1 Hz.
Locked to GPS
HP 3336B Synthesizer --- Locked to GPS
Tektronix 2213A Oscilloscope --- Zero Beat Indicator
Configuration: The pre-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. For convenience, the scope is 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, the waveform will not “slip” in either direction but will just vary in amplitude with variation 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 one
Hz causes the direction of motion of the waveform to reverse, the exact frequency is BETWEEN the current and former readout, i.e. between two concurrent one Hertz points.
For those “in-between-hertz” measurements, the Racal is tuned Immediately ABOVE the unknown frequency and the HP3336B is then tuned upward, in one milliHertz steps, from 455,000.000Hz until the right to left movement of the waveform on the Tek display stops. The millihertz DELTA is then SUBTRACTED from the Racal readout to give the “exact” 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 shifts that occur during selective fading.|
Soapbox: W6OQI -70dBm East Coast Very little doppler; -90dBm JA/N Pac... K5CM -90 dBm 40m some doppler; K5CM -70dBm 80m some doppler... TNX Charles and Connie!! 73 Don, W4WJ
|Method: Calculator, Spectrum Lab, K3|
Soapbox: Hope ARRL mails out certificates for 2015! hadn't done FMT since last event, about 20 minutes before FMT loaded Spectrum Lab on new computer & checked calibration against WWV on 5mhz The JA run on 20 seemed hair lower in freq. Hope did math OK
|Method: Ten-Tec Jupiter and Spectrum Lab. Calibration with WWV (3 freqs) and CHU (3 freqs) gave a straight line correction factor ranging from 11.5 Hz (at 3.33 MHz) to 37 Hz (at 15.0 MHz).|
Soapbox: My first measurement attempt. Sorry, but I forgot to re-measure W6OQI during the JA portion. Thanks for a very worthwhile exercise. I look forward to the November test. Also, thanks for the helpful article in QST April 2015 by VE3GSO. It was great encouragement.
|Method: Flex 6500 with Fldigi|
|Soapbox: 20 not heard, 40 strong, little doppler, 80 strong, dopplerl|
|Method: HP Z3801B GPS receiver reference for HP 3586B frequency and level meter for receiving and measuring FMT. For transmitting the FMT on 20 meters, HP Z3801B GPS receiver reference for HP 3336B signal generator serving as VFO for an old Viking One transmitter used as an IPA to drive an Icom 4KL amplifier to about 500 Watts. Antenna is a Hygain 3DXX beam at about 55 feet above ground.|
Soapbox: K5CM signals on 80 and 40 were good here in Southern California at S9 but with the usual Doppler shift to make the signals a moving target.
|Method: GPS PLL LOCKED IC706|
Soapbox: Somewhat of a guess with signals moving around.
|Method: IC-706MKII with N6GN mod to reference lock the 30 MHz with audio going to Spectrum Lab. 10 MHz from Shera GPS standard.|
Soapbox: The 20-m signal was broad, often around a Hz wide. Worst spreading on 20-m was the second transmission. Many thanks to all for providing the signals and the event.
|Method: 3336C (new to me... I was not fast enough with its operation, K3S, SpectraLab with synthesizer offset.|
Soapbox: Thanks to K5CM
|Method: Flex 6700 with gpsdo
using fldigi frequency analysis|
Soapbox: first try with fmt.
|Method: K3 with KSYN3A calibrated against 10 MHz WWV. Measurement by zero beat in CW mode against K3 "spot" audio tone.|
Soapbox: W6OQI was too weak to measure with his beam pointed toward JA. Unable to decide closest Hz on 80M, so split the difference.
|Method: FlexRadio 6500 locked to 10 MHz from Trimble Thunderbolt GPS. Radio audio recorded on Denon SD card recorder right channel, 2 kHz reference tone recorded on left channel. HP 3325A provided the 2 kHz tone, also locked to GPS. I wrote a GNU Octave script that reads the stereo WAV file, filters, measures, and weighted-averages the frequencies, and corrects for Denon recorder sampling rate error using the GPS locked 2 kHz tone. Denon is off about 0.2 Hz (at 44.1 kHz).|
Soapbox: 20 meter signal very weak, good signals on 40 and 80. For last November's FMT I transcribed frequencies by hand, got dyslexic, and transposed some digits creating a 10 Hz (!) error in my 160 meter result. This time I am cutting and pasting the outputs from GNU Octave so I don't mess it up again. I hope. Thanks for running the test - this is fun!
Soapbox: Signal Strength: 20M (East) -115 dBm; 20M (West) -107 dBm; 40M -77 dBm; 80M -98 dBm. Entered West 20M signal in contest; East 20M measurement 14,121,544.86. Very little QSB or QRN.
|Method: ICOM-R75, HB Q5er, HB DSS Generator, Tek 465 Scope, Diarcy GPS Rx.|
Soapbox: 20 Mtr sig 9+10, 40 Mtr sig 9+10, 80 sig 9+20. Nothing usable on 20 backside and 40 Mtr had some signs of multipath.
|Method: IC706MKIIG 600Hz CW compared on scope with DDS Audio Gen 600Hz.|
Soapbox: 20M signal about S-6 until pointed away, then mostly unreadable. 40M and 80M S-9 plus.
|Method: WJ-8718 Receiver locked to Rb standard, beat note measured with DL4YHF's Spectrum Lab software.|
Soapbox: Good signals on all runs. 20m East was Q5 copy by ear. 20m West was in the noise but very visible on Spectrum Lab. Both 20m runs agreed in frequency within 20 mHz. Great sigs on 40 and 80. Thanks to Connie and Marvin for another fine FMT.
|Method: Used sss3,3586, and scope method along with SL reading output of 3586 with a 20 second sample rate. Listed average of the two errors - will see how that works.|
|Method: Thunderbolt GPS, HP 3586B SLM, Spectrum Lab for tuning, Triband Beam & dipole antennas. 20 M sig extremely weak. 40 M VG. 80 M much QSB.|
Soapbox: Lots of fun but improvement is very slow. Tnx Connie & all. 73 Gordon
|Method: Flex 5000A receiver, HP3336B signal generator locked to a GPS reference.
AM detection using the zero beat method.|
Soapbox: The 20 meter signal was weak on both transmissions, my measurement is questionable mostly a guess. The 80 and 40 meter signals were also weak but still good enough to be measured.
|Method: ICOM-7800 and VA64 calibrated against 10 mHz WWV before and after.|
Soapbox: Sure hope I got the sign of the corrections correct. . . Static crashes from the cold front may have added a few extra zero crossings. Also, the FMT data entry page rejects cut and paste out of MathCAD.
|Method: Yaesu FT-857D locked to a Trimble Thunderbolt GPS via an XRef-FT board. Spectrum Lab with both long and short FFTs, each averaged. Additionally, an Octave script from a friend for a comparison. A separate TBolt to check calibration of the Yaesu dial and to determine temperature sensitivity of the sampling rate. I fed the recorded audio into one scope channel and used an Agilent 33120A/001+TBolt on a second channel to steady the trace, as a rough check on the numbers. Used a noisy indoor garage attic dipole for 20 and 40, and a Pixel Loop (AM-2) for 80m.|
Soapbox: East 20m signal was in the noise, and West barely audible. Sigs on 40 and 80 were strong. Really enjoyed the test -- thanks for putting it on.
|Method: Thunderbolt, HP3586B, Spectrum Lab, low 20m dipole, 80m dipole, miniwhip. No computers were harmed during this measurement. -Bill EM27pj|
Soapbox: Signals: 20m east -80dBm, 40m -67, 80m very strong at -48dBm. CHU near 40m had very little doppler (<.15Hz at 9:30 CDT) so no correction was made in my measurements. Many tnx to W6OQI, K5CM, and WA7BNM.
|Method: Kenwood TS-2000 with vertical antenna. Homebrew PC (built-in sound card) with Spectrum Lab software.|
Soapbox: Band conditions were terrible and had a hard time calibrating the sound card and internal radio correction via outside standards (WWV, CHU). Signal on 20 meters was below marginal at best, but better on 40 and 80 meters.
|Method: Icom-7200 and a Tektronix TDS 1012 (Last cal... years ago). Two days of warm up. Measured Icom-7200 frequency error against WWV. Best fit line. Interpolated for FMT frequencies.|
Soapbox: 579 on all frequencies here in Texas, except when W6OQI swung his beam toward JA and North Pacific--I could tell when he was turning it.
|Method: K3 w phase locked master oscillator. GPS DO as reference source. HP 3320B audio synthesizer, Eldorado 1650 counter referenced to the GPS DO reference source. HP 1740A in XY mode and Tektronix 224 and Spectrum Lab to monitor the audio.|
Soapbox: 20M was very poor S/N. I measured 14121549.8 for the first part beaming East and 14121546.8 beaming West. I trust neither 20M measurement! 40M was the best S/N and 80 was weaker than 40 but still very clean signal.
|Method: IC-756PROII, Spectrum Lab, Wavetek 3002 Signal generator
Also experimenting with K1JT’s FMT package. (These FMT tools are included with his WSPR program.) I was not using his tools the way they were intended so don’t blame the tools if I am way off.|
Soapbox: The 20m signal was in the noise, and inaudible when pointed toward Japan.
|Method: Anan 100d, fldigi.|
|Method: Temperature Calibrated KX3 + Spectra Lab software|