November 11, 2010
Actual Radio Frequencies (Hz):
W8KSE/K5CM/WA6ZTY/W6OQI All (<=1 Hz):
AB4RS, AF6ZE, K1GGI, K1JT, K4COD, K4MF, K5BTK, K5CM, K5XL, K6HLH, K6IQL, K6OQK, KC2LFI, N1NAZ, N3FG, N5DM, N5VP, N8OB, NO5K, VE2IQ, VE3OAT, W0HBK, W3JW, W5PDB, W5SXD, W6OQI, W7JDE, W9RM, W9ZB, WA1ABI
W8KSE 80 (<=1 Hz):
AA8K, AB2UW, AB4RS, AF6ZE, K0ANS, K0FT, K0MZ, K0OD, K1GGI, K1JT, K4COD, K4MF, K5BTK, K5CM, K5XL, K5YJ, K6APW, K6BZZ, K6HLH, K6IQL, K6OQK, K9JM, KB3LTT, KB4ZVM, KB5HPL, KC2LFI, KC2QII, KD2BD, KD5MMM, KD8CAO, KU8L, KV6O, N0MFD, N1NAZ, N2JOM, N3FG, N4AU, N5DM, N5JOA, N5LBZ, N5VP, N8OB, NJ0U, NO5K, VE2DID, VE2IQ, VE3NVK, VE3OAT, W0HBK, W0PHD, W1PW, W2FD, W2VQS, W3JW, W5EMC, W5GW, W5PDB, W5SXD, W6IHG, W6OQI, W7HR, W7JDE, W7KPZ, W8AC, W8TM, W9RM, W9TJ, W9ZB, WA1ABI, WA2DVU, WA4FJC, WA5DJJ, WA8OFU, WB0LXZ, WB2GMY, WB5EXI, WB6RQN, WB8TFV
W8KSE 80 (>1 to <=5 Hz):
AB1IX, K4RKM, KB0HTQ, KD4ICT, KK5J, KK8O, N0PFE, N9CYL, W3NF
W8KSE 80 (>5 to <=10 Hz):
K0HJ, W4NUS, WA6UAT
W8KSE 80 (>10 Hz):
G3WW, K0DSP, K3TUF, K3YS, KA8K, KB3VR, KH6OU, KI8L, KM6QX, N3DV, W4RYF, W9RDA, WB5NMZ, WD9GLR
W8KSE 40 (<=1 Hz):
AA8K, AB4RS, AF6ZE, G3WW, K0ANS, K0FT, K1GGI, K1JT, K4COD, K4MF, K5BTK, K5CM, K5XL, K6APW, K6BZZ, K6HLH, K6IQL, K6OQK, K9JM, KC2LFI, KC2QII, KU8L, N1NAZ, N3FG, N4AU, N5DM, N5LBZ, N5VP, N8OB, NO5K, PA3FWM, VE2IQ, VE3OAT, W0HBK, W0PHD, W2FD, W2VQS, W3JW, W3NF, W5EMC, W5GW, W5PDB, W5SXD, W6IHG, W6OQI, W7JDE, W8TM, W9RM, W9TJ, W9ZB, WA1ABI, WA6ZTY, WA8OFU, WB0LXZ, WB5EXI, WB6RQN
W8KSE 40 (>1 to <=5 Hz):
K0MZ, K4RKM, KD5MMM, KK8O, N0MFD, N0PFE, N9CYL, W7KPZ, WB5NMZ
W8KSE 40 (>5 to <=10 Hz):
K3TUF, K5YJ, W4NUS
W8KSE 40 (>10 Hz):
K0DSP, KA8K, KB3VR, KD4ICT, KH6OU, KM6QX, N3DV, W4RYF, W7HR, WA4FJC, WA5DJJ
K5CM 160 (<=1 Hz):
AA8K, AB2UW, AB4RS, AF6ZE, AF9A, G3WW, K0ANS, K0MZ, K0OD, K1GGI, K1JT, K4COD, K4MF, K5BTK, K5CM, K5XL, K6APW, K6HLH, K6IQL, K6OQK, K9JM, KB3VR, KB4ZVM, KB5HPL, KC2LFI, KD2BD, KD8CAO, KK8O, KU8L, KV6O, N0MFD, N1NAZ, N2JOM, N3FG, N4AU, N5DM, N5JOA, N5VP, N8OB, NJ0U, NO5K, VE2IQ, VE3NVK, VE3OAT, W0HBK, W0PHD, W1PW, W2FD, W2VQS, W3JW, W4NUS, W4RYF, W5EMC, W5GW, W5PDB, W5SXD, W6IHG, W6OQI, W7HR, W7JDE, W7KPZ, W8TM, W9RM, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6ZTY
K5CM 160 (>1 to <=5 Hz):
AB1IX, K0HJ, K4RKM, K7JL, KB0HTQ, KD5MMM, KK5J, N0PFE, N9CYL, W3NF
K5CM 160 (>5 to <=10 Hz):
KD4ICT, KH6OU, KI8L, WB5EXI
K5CM 160 (>10 Hz):
K0DSP, K3TUF, K6BZZ, KA7OEI, KC2QII, KM6QX, N3DV, N9VN, WA4FJC, WA5DJJ, WA6UAT, WB5NMZ, WD9GLR
K5CM 80 (<=1 Hz):
AA8K, AB2UW, AB4RS, AF6ZE, AF9A, G3WW, K0ANS, K0FT, K0MZ, K0OD, K1GGI, K1JT, K4COD, K4MF, K4RKM, K5BTK, K5CM, K5XL, K5YJ, K6APW, K6BZZ, K6HLH, K6IQL, K6OQK, KA7OEI, KB4ZVM, KB5HPL, KC2LFI, KD2BD, KD5MMM, KD8CAO, KI8L, KU8L, KV6O, N1NAZ, N2JOM, N3FG, N4AU, N5DM, N5JOA, N5LBZ, N5VP, N8OB, NO5K, VE2DID, VE2IQ, VE3NVK, VE3OAT, W0HBK, W0PHD, W2FD, W2VQS, W3JW, W4RYF, W5EMC, W5GW, W5PDB, W5SXD, W6IHG, W6OQI, W7HR, W7JDE, W7KPZ, W8TM, W9RM, W9TJ, W9ZB, WA1ABI, WA2DVU, WA4FJC, WB0LXZ, WB5EXI, WB6RQN, WB8TFV
K5CM 80 (>1 to <=5 Hz):
KB0HTQ, KK8O, N0MFD, N0PFE, N9CYL, N9VN, W1PW, W3NF, W4NUS
K5CM 80 (>5 to <=10 Hz):
K5CM 80 (>10 Hz):
AA7OO, K0DSP, K0HJ, K3TUF, K3YS, K9JM, KB3LTT, KB3VR, KC2QII, KD4ICT, KK5J, KM6QX, N3DV, NJ0U, W7MOT, WA5DJJ, WA6UAT, WB5NMZ, WD9GLR
WA6ZTY 40 (<=1 Hz):
AA6LK, AA8K, AB2UW, AB4RS, AF6ZE, G3WW, K0ANS, K0OD, K1GGI, K1JT, K4COD, K4MF, K5BTK, K5CM, K5XL, K5YJ, K6APW, K6BZZ, K6HLH, K6IQL, K6OQK, K7JL, K9JM, KA7OEI, KB3VR, KB5HPL, KC2LFI, KD5MMM, KD8CAO, KK5J, KU8L, KV6O, N1NAZ, N3DV, N3FG, N4AU, N5DM, N5JOA, N5LBZ, N5VP, N8OB, NO5K, VE2DID, VE2IQ, VE3NVK, VE3OAT, W0HBK, W1PW, W2FD, W2VQS, W3JW, W4NUS, W4RYF, W5EMC, W5GW, W5PDB, W5SXD, W6OQI, W7JDE, W7KPZ, W8TM, W9RM, W9TJ, W9ZB, WA1ABI, WA2DVU, WA4FJC, WA5DJJ, WA6ZTY, WB0LXZ, WB3BEL, WB6RQN
WA6ZTY 40 (>1 to <=5 Hz):
AB1IX, K0MZ, K4RKM, KB0HTQ, KB4ZVM, KC2QII, KI8L, KK8O, N0MFD, N0PFE, N9CYL, N9VN, W0PHD, W3NF
WA6ZTY 40 (>5 to <=10 Hz):
WA6ZTY 40 (>10 Hz):
AA7OO, K0DSP, K0HJ, K3TUF, KD4ICT, KH6OU, PA3FWM, W7HR, W7MOT, WB5EXI, WB5NMZ, WB8TFV
W6OQI 80 (<=1 Hz):
AA6LK, AA8K, AB2UW, AB4RS, AF6ZE, K0ANS, K0MZ, K0OD, K1GGI, K1JT, K4COD, K4MF, K4RKM, K5BTK, K5CM, K5XL, K5YJ, K6APW, K6BZZ, K6HLH, K6IQL, K6OQK, K9JM, KA7OEI, KB3VR, KB5HPL, KC2LFI, KC2QII, KD2BD, KD5MMM, KD8CAO, KV6O, N0MFD, N0PFE, N1NAZ, N3FG, N5DM, N5JOA, N5LBZ, N5VP, N8OB, N9VN, NO5K, VE2IQ, VE3OAT, W0HBK, W1PW, W2FD, W3JW, W4NUS, W4RYF, W5EMC, W5GW, W5PDB, W5SXD, W6OQI, W7HR, W7JDE, W8TM, W9RM, W9TJ, W9ZB, WA1ABI, WA5DJJ, WA6ZTY, WB0LXZ, WB5EXI, WB6RQN
W6OQI 80 (>1 to <=5 Hz):
KB0HTQ, KI8L, KK5J, N9CYL, WA6UAT
W6OQI 80 (>5 to <=10 Hz):
K0HJ, KH6OU, WA4FJC
W6OQI 80 (>10 Hz):
AA7OO, K0DSP, K3TUF, K7JL, KD4ICT, KM6QX, N3DV, W0PHD, W7KPZ, W7MOT, WA2DVU, WB3BEL, WB5NMZ
W6OQI 40 (<=1 Hz):
AA6LK, AB2UW, AB4RS, AF6ZE, K0MZ, K1GGI, K1JT, K4COD, K4MF, K5BTK, K5CM, K5XL, K5YJ, K6BZZ, K6HLH, K6IQL, K6OQK, K9JM, KA7OEI, KB3VR, KB5HPL, KC2LFI, KC2QII, KK5J, KV6O, N1NAZ, N3FG, N5DM, N5JOA, N5VP, N8OB, NO5K, VE2IQ, VE3OAT, W0HBK, W2VQS, W3JW, W5PDB, W5SXD, W6OQI, W7JDE, W9RM, W9ZB, WA1ABI, WA5DJJ, WB0LXZ, WB5EXI
W6OQI 40 (>1 to <=5 Hz):
K0ANS, K4RKM, K7JL, KD5MMM, KI8L, N0MFD, N9CYL, W3NF, W8TM
W6OQI 40 (>5 to <=10 Hz):
W6OQI 40 (>10 Hz):
AA8K, K0DSP, K3TUF, KD4ICT, KH6OU, KM6QX, KU8L, N3DV, VE3NVK, W0PHD, W4RYF, WA2DVU, WA4FJC, WB3BEL, WB5NMZ
Result Details (n=114):
|Method: FT-847/5BTV, HP Z3801 locking a Marconi 2019 sig-gen acting as beat oscillator against incoming signal, with receiver in AM mode acting as detector; fed audio to laptop running SpecLab; computed test frequency from sig-gen and audio freqs.|
Soapbox: Got home in time for the last three runs; terrible condx on 40M for ZTY/OQI, both at noise level; OQI very strong on 80M; thanks, guys.
|Method: Equipment Used::
Antenna: 240' dipole and Scorpion screwdriver; Receiver: IC-703 & IC-7000; Frequency Standard: Rubidium 10Ghz; homebrew spliter: 10Ghz input, 10Ghz output and 1000hz output; Signal Generator: R2600; Computer: Dell D820; Software: Windows7, SpectrumLabs 2.76 b8; Excel.
Calibration of sound card: Rubidium 10Ghz as source to spliter with 1000hz fed to sound card line-in. Using SpectrumLab calibration software to calibrate the 48000 sample rate. Additionally, the correction factor was calculated.
Measurement setup: Rubidium 10Ghz as source to variable signal generator R2600, output of R2600 coupled to antenna input to IC-603.
Operation of measurement: the R2600 was set to announced test frequency. Receiver was used to find and tune the FMT carrier signal to be measured.
Method of calculation: Output from SpectrumLab was analyzed using Excel. finding the measurement frequency used several techniques; noise, average, and standard deviation, and scatter plots to eliminate outliers and the result multiplied by the "correction factor" to get the final measurement of the carrier. It is worth mentioning that the scatter plot visually demonstrated how all the math was working on the raw data, an excellent validation.|
Soapbox: K8KSE; No signal was audibly heard on 80m or 40m. Initial post analysis of the recorded signal found nothing meaningful. K5CM; No signal was audibly heard on 160m. The post analysis of 160m file had some intermittent tones audiable and some suspected analysis numbers. In the time available results were not reliable. Further analysis techniques may pull the signal out of the noise. But there was not enough time in my day to play with this interesting file. WA6ZTY copied strong. W6OQI was strong on 80m and no copy on 40m. FMTs are fun and challenging with equipment, calibration, the actual technique of finding the signal to be measured, and then the calculations.
|Method: I used only Open HPSDR, Thunderbolt GPSDO, and Spectrum Lab. I offset the HPSDR frequency about 500 Hz to make an tone with its BFO, used PowerSDR to make a wave file. Played the wave file back and ran Spectrum Lab, noted the offset from the HPSDR frequency. Antenna: ground-mounted vertical 20 meters high.|
Soapbox: Poor propagation. W8KSE and WA6ZTY only a couple of dB above noise on 40 meters; same for W6OQI on 80 meters. For W6OQI, I may just be imagining a carrier in the noise. K5CM 80 meter signal level -87 dBm, 160 meter -79 dBm. W8KSE 80 meter sig level -81 dBm. WWV here 2.5 MHz -77 dBm, 5 MHz -64 dBm, 10 MHz -93 dBm. I looked at the due date and discovered I had about 1.5 hours to look at my wave files. Hope I made it in time. -AA8K
|Method: Intended to use Rb-disciplined HP 3336B and HP 5334A counter to make frequency comparison using Racal 1772 receiver, but Rb oscillator faulted literally 2 minutes before the test. I ended up using the Racal alone in ISB mode, noting by ear positive and negative frequency offsets which gave the same audio pitch; and then averaging the results of several such measurements.|
Soapbox: Missed first two transmissions due to aforementioned equipment failure. Couldn't copy k5CM on 80M due to QRM. 160M transmission was heard FB, as was WA6ZTY. This was a very enjoyable test, many thanks to those who made it possible. The equipment failure I noted turned out to be a shorted power transistor in the oven circuit, the heater for the physics package was drawing 8A before I shut it down! Next year I'll try to have a working reference oscillator!
|Method: Thunderbolt GPSDO 10MHz output synchronizing a Racal-Dana 1992 freq counter & (divided by 2) an HP 8640B. IC-7000 warmed up for 6 hrs; rcvr. audio output interfaced to freq. counter & laptop running Spectrum Lab. Locked 8640B to all 7 'nominal' frequencies before FMT and recorded sidetone freq (to .01 Hz) when rcvr. was tuned to each 'nominal' freq. During test, tuned receiver to nearest 1 Hz freq that gave about the same sidetone, then corrected for the <1Hz difference (rcvr. only tunes in 1 Hz steps). Recorded rcvr. tuned freq and sidetone freq. Spectrum Lab did a better job of averaging using FFT function than freq. counter (next year, will have to connect counter to computer via GPIB to record all freq counter readings during the FMT.) Even after 6 hr warmup, noticed some receiver (or laptop/soundcard) drift over 1.5 hour FMT measuring time (~0.2Hz). Difficult to get average reading with QSB and/or Doppler on some of the signals.|
Soapbox: Couldn't copy first '7055' signal (bad conditions?? rcvr. BW too narrow?? operator error??), but the other 6 were received OK 50 miles east of NYC. QSB on the '1844' and '7097' signals - good thing we had 3 mins to average the results. Forgot to record S-meter reading at each frequency, but the 6 signals I saw were clearly visible on the Spectrum Lab display. Thanks to all who made this possible!
|Method: Delta reference method. HP3336C locked to Trimble Thunderbolt 10MHz generated the reference signal. Tuned to AF using Yaesu FT-897d. Capture and initial analysis with SpectrumLab. Additional analysis with custom-written program.|
Soapbox: Enjoyable as always. W8KSE 40m barely audible in the noise. W8KSE 80m and K5CM 80m and 160m loud and clear. West coast stations weaker, but readable.
|Method: IC-7000 with 110ft random wire antenna. Recorded audio signal (CW mode, 600Hz pitch) using Audacity on a Mac. Initially measured AF with Audacity, then wrote custom C program to do hi res spectral analysis. Did same for WWV 5Mhz and adjusted for system drift (0.10 Hz/15 min).|
Soapbox: Enjoyable exercise. I'm sure I will get better with practice. 160 Meters signal was almost buried in the noise for me. There was some measured drift of the system with respect to WWV, so a linear (vs. time) correction was applied.
|Method: Watkins-Johnson WJ-8711 receiver I/F output fed against a reference from signal generator. Tuned for lissajous using X-Y mode on a Kenwood CS-4125A oscilloscope.|
Soapbox: Extreme QRM from commercial teleprinter completely masking W8KSE on 80m. K5CM very readable on 80m but barely audible on 160m. WA6ZTY not sure if I could hear, I think 7097499 but the form won't let me submit it. W6OQI nil heard both frequencies. What sort of power and antennas were the TX stations running?
|Method: Yaesu FT-817 with TCXO and an iMac running cocoaModem. Turn the rig on before dinner. Put the rig in LSB mode. Tune to 1 or 2 kHz above the expected frequency. Center the PSK31 tuner on the computer. Subtract the result from the dial frequency. Listen to WWV to get a correction factor for the results.|
Soapbox: I heard broad QRM around 7067 kHz. I couldn't hear W6OQI at all on 40m. There was a vague bright line in the waterfall. I guessed that was it. I listened to WWV several times and got a different result each time. Sigh. It was easier to lock on to one of WWV's modulated audio tones than to its carrier.
|Method: Icom IC-718
Zero beat between LSB & USB|
Soapbox: Just read about this event in the Nov QST and thought I would give it a try. Thanks to the stations hosting this event. I hope to have better numbers next time!
|Method: Hustler vertical antenna to Elecraft K3 xcvr. Used WSPR+FMT software to capture frequencies|
Soapbox: Good signals from all 7 sources but missed four frequencies due to an attack of first time user jitters - better results next time!
Soapbox: First FMT
|Method: Hallicrafters SX-73 receiver, Drake TR-7 transfer oscillator, Heath IM-4100 counter clocked with Hp 10544A oven xtal osc. W8KSE 40 M signal was almost unaudable, 80 M was solid 40 over with moderate doppler, some QSB. K5CM 160 M signal was 40 over, some QSB, little doppler, 80M was S9, some QSB, minor doppler. WA6ZTY 40 M signal was S9, moderate QSB, not much doppler. W6OQI 40 M signal was S1, QSB with deep fades, little doppler, 80 M sig S9, QSB moderate fades and QRM nearby.|
Soapbox: All equipment is old enough to be made in USA. I tuned and matched all signals strictly by ear. Thanks for the fun FMT.
|Method: Flex-5000A alone. Fldigi connection crashed just before the test and didn't have time to fix it. Used Flex in DSB mode with the radio's built-in scope. Calibrated to 5 MHz WWV an hour before test.|
Soapbox: Never heard W8KSE or W6OQI on 40.
|Method: Heterodyne with known signal referenced to gps, find beat frequency with Spectrum Lab.|
Soapbox: Another fun one. Thanks to all the fmt stations.
|Method: Kenwood TS-2000, AC-97 motherboard soundcard, WSPR/FMT software.|
Soapbox: Signals not nearly as strong or in-the-clear as last April, but all stations were heard. QRM/QRN was a problem, and Doppler levels suggest that Mr Ionosphere was having a restless night. Lots of fun, nevertheless.
|Method: Flex 5000A with Spectracom Reference|
Soapbox: Going to keep working at this. Thanks, Phil
|Method: FT-1000MP Mark V Field. Used the accurcy of dial display plus the extended frequency display. Yes, I know I am "stuck" with a 7 Hz window because of the TCXO but it gives me some idea of the receiver's accurcy.|
Soapbox: This was my first ARRL FMT,I did it to have fun ,which I did. 80 meters from K5 and W8 were the only usable signal,the 160 meters signal was just too weak. The two signals I got did have a lot of fade. Hope to try again in April 2011
|Method: Icom 756 ProIII using Spectrum Lab software. The computer audio card was calibrated in Spec Lab to the 500hz tone from WWV. A local GPS locked AM broadcast station was used for reference to obtain the ppm freq error that was used in the frequency calculations.|
Soapbox: This was my first ARRL FMT event, and my second FMT activity. The doppler shift was really a problem on three of the tests, due to weak signals. I hope I got close. I've found that the ProIII is actually 1.175hz off of the frequency that is shown on the digital display. I compensated for this in my calculations. Since this is the first use of the ProIII for this event, it will be interesting to see if my calculations compensated correctly. Thanks much to the four stations, and the ARRL, for hosting this event. It is a fun way to use the radios, computer, and your brain. Hope the brain worked ok. I know the radio and computer did fine.
|Method: TS2000 and Spectrum Lab. Correction graph using WWV-10,5 and 2.5.
CHU at 7.85 and 3.33.|
Soapbox: First try with the TS2000. Good signals except W6OQI on 40m.
|Method: PERSEUS SDR / "Peak Search" function.|
Soapbox: A waterfall display is a great way to spot the test frequency!
|Method: I use a standard FT-1000MP (no TCXO) tuned ~1000hz off the frequencies of the unknown and WWV. Spectrum Lab records the beat frequencies as the receiver is toggled every 5 seconds from one to the other. The average of WWV's apparent frequency "error" is calculated during each 10-sec interval in which the unknown frequency is measured. Using this to determine the receiver's oscillator error, the "true" frequency is calculated for the unknown. The value reported is the average of all these (15 or so) 10-second measurements. (This is an attempt to compensate for the short-term drift caused by the cycling of the FT-1000MP's cooling fan and the house's HVAC).|
Soapbox: My only antenna is a 20m dipole which does little for 40m, 80m, and 160m signal strengths.40m (W8KSE & W6OQI) produced only intermittent, faint traces on the waterfall. Big signal for the evening was K5CM on 80m (not bad on 160m either). Thanks for the fun!
|Method: Transmitting: An HP-Z3801 GPSDO clocks an HP-3336. A 10db transistor amp follows and drives a 12BY7/6146 amp. The final amp is an MLA-2500 running 400-500 watts output. While transmitting I monitor the output with a completely different GPSDO system. See www.k5cm.com for more info.
RX: Dual receive systems: K3 and a FT-1000d set to AM mode. A PTS-250 and/or a HP-3336b provides low side injection for the receivers. The output is feed to two seperate computers running SL. Antenna: several 600' beverages on the K3. 160m Vertical,80/40m dipoles and 4el SteppIR on the FT-1000D.|
Soapbox: Great to see so many entries, with several from Eu. Conditions were fair, and not as good as last April. From other comments it appears the skip was long, with 40 meters skipping over many stations. Mr. Doppler certainly made his presents known. Time was a little tight on switching from receiving Mike, W8KSE to TXing on 80 meters. I think I had a couple of minutes to spare. Thanks to Ward (N0AX), Bruce (WA7BNM), and to the ARRL for providing QST space and sponsoring this FMT..... 73, Connie
|Method: FT-1000MP with TCXO calibrated to local AM broadcast station on 620 Khz. Tuned about 500 hz low in USB and measured audio beat note using SpecLab with PC soundcard.|
Soapbox: Lots of doppler and fading. Signals all OK except W6OQI on 40M was just barely there. Thanks to all who conducted this FMT.
|Method: 50' Dipole antenna fed with Heliax with AM Broadcast filter. ICOM PCR-1000 receiver fed to a Creative Labs EE-MU 0202 external USB sound card. SpectrumLab version 2.75 B12 set to highest FFT (524288 bins) and 24-bit sampling used for audio frequency to about 0.1 Hz. Total system error calculated using WWV and interpolated. PCR set to USB, 3Khz BW. Freq = Commanded Freq + Audio Measurement - interpolated error. Ionospheric doppler effects not applied.|
Soapbox: Could not find K5CM's signal on 160m. Ionospheric doppler was not compensated for - or at least attempted. WWV line of sight is perpendicular to prevailing ionosphere velocity, so doppler should be minimal in calibration. Some "wavering" noticed on K5CM and W6OQI when CW started. Have captures of the plots. Fun evening. NOTE: W5ZTY entry not being accepted by web app. Measured 7097499.5 for WA6ZTY.
|Method: Argonaut V, audio hybrid combiner, digital audio generator. Beat to zero by ear and calculate calibration offset.|
Soapbox: Absolutely zero path from W6OQI on 40M, S8 on 80M. W8KSE at noise level at start but came up some. K5CM in and out of noise level. WA6ZTY only about one mile distant.
|Method: Trimble Thunderbolt GPSDO, FT-817 with tcxo, HP-3336B, laptop with Win 7, Spectrum Lab. Attic 40 meter dipole, with tuner. Pre-FMT checklist with many items.|
Soapbox: K5CM 160 meter sig not there. Some below- noise- level data, might be him or not. All other sigs readable but only strong one was WA6ZTY 40 meter. Thanks for running the tests. Lots of fun.
|Method: Flex 5000A with Z3801 as ext 10 MHz input. Used K1JT FMT software to collect data.|
Soapbox: Had lots of fun, will be interesting to see if I am doing the caibration and math right.
|Method: Received signal beat with RF reference from Rb Referenced Fluke 6070 synthesizer to produce approx 400 Hz tone using AM detection in Collins 75A4 receiver. Tone recorded and post processed using Spectrum Lab and Excel. Freq vs time and freq-amplitude scatter diagrams used to examine and qualify data. About 80 points per tone. Sample rate 12kHz, FFT 32768, Decimate 1, Window time 2.731 Seconds, No overlap, and no averaging in FFT. Amplitude selected average in Excel. Sample rate and Rb calibration verified with T-bolt GPS. GAP Eagle vertical, except 160 M - used 87 Ft tuned and matched long wire fed against ground.|
Soapbox: Great fun as always. W8KSE seen for less than 1 minute as a faint line in the waterfall. Other signals had good SNR in Spectrum Lab bandwidth though some hard to discern in 800 Hz receiver bandwidth. Thanks again to the organizers. 73 John K6IQL
|Method: I use a GPS referenced HP-3586B's 15625 Hz I.F. driving one side of a scope, and a GPS referenced HP-3336A Precision Signal Generator driving the other side of the scope for a 1:1 Lissajou pattern. I also run Spectrum Lab in parallel with the above system. For more information on my FMT methodology see: http://www.k5cm.com/k6OQK%20FMT%20NEW.htm|
Soapbox: All signals were good with the exception of Connie's 160-Meter signal and Mike's 40-Meter signal - Both were right at the noise floor. I attribute part of that to using a very short, low dipole while my main Inverted-V is down for repairs and modification. Thanks to all for another great FMT. I always look forward to them and the associated camaraderie. Burt, K6OQK
|Method: Kenwood TS-450SAT, IFR1200, HP4935A. I used the Hetrodyne Method.|
Soapbox: I received S9+10db severe noise interference during W8KSE's duration and it went away in the middle of K5CM's 160 meter signal so I can only report on what I could hear. The W6OQI signal on 40 Mtrs was very weak at only S3! He was S9 on 80 Mtrs! WA6ZTY's 40 Mtr signal was S9.
|Method: Beat against secondary frequency standard.|
Soapbox: Too long... CA station on 40m in CA were VERY VERY weak!
|Method: Schlumberger 4031 locked to Z3801 GPSDO generating reference signals received at the time of FMT test transmissions. After each test, WWV/generator signals were recorded to provide calibration/sanity reference.
After FMT, audio file played back, sampling errors measured using WWV references and frequency differences of FMT/generator signals measured to calculate actual FMT transmission frequency.|
Soapbox: Did not get set up in time for W8KSE signals. K5CM signals pretty good on 80 and 160. WA6ZTY and W6OQI signals weak on 40, but W6OQI very good on 80. Minimal QRM.
|Method: Kenwood TS480 and Frequency Counter|
|Method: FT-450 and FLDIGI|
Soapbox: This was my first attempt at FMT.
|Method: 80m dipole set up as an NVIS. Receiver Yaesu FT-857 w/out TCO option. Audio was fed into a Dell PC running Win XP. Fldigi software running in Frequency Analysis mode was used to determine the frequency. The software was used to check the amount of offset needed to compensate for the soundcard. There was none needed. The detup was used to determine any frequency offset caused by the receiver's oscillators by tuning CHU at 3330 kHz. An offset of +3.47 Hz was found and this was used to correct the final measurement. A series of six measurements was made at each of the frequencies measured to reduce any pointing error on the waterfall of the program.|
Soapbox: Due to several pressing family matters (which always seem to crop up in the Nov FMT), I almost didn't get any measurements at all so the two I made were an accomplishment. My setup did not seem allow me to receive the earlier (0230 UTC) signal on 40m. I monitored the frequency but heard nothing. Perhaps an antenna cut and tuned for 40m would have worked better. I did not have the opportunity to listen for any other signals after 0300 UTC
|Method: Yaesu FT-897 - with normal x-osc - warmed up for only 2.5 hours. K1JT's WSPR software.|
|Method: I used an Icom 706 with the display set for 1 Hz precision. The antenna was a long wire (about 90 feet) with an SGC-230 autotuner. I connected the fixed audio output of the transceiver to the line level input of the sound card on a Pentium 4 computer, and ran Digipan software. I calibrated the transceiver by setting the "CW Tone" to 600 Hz, and tuned to WWV with the transceiver set to "CW" mode. I then carefully adjusted the tuning until the Digipan software indicated that the heterodyne tone was 600 Hz, and noted the display error. I further refined the calibration using the results of the April 2010 FMT, and determined that the transceiver display indicated 2.51 ppm high on 40 meters, and 2.55 ppm high on 80 meters. I applied these corrections to this FMT, and I used the 80 meter correction of 2.55 ppm for the 160 meter transmission.|
Soapbox: The noise floor was extremely high on all bands, but particularly on 40 meters. I heard none of the 40 meter transmissions, except that of WA6ZTY, and the signal strength of that transmission was down at the ESP level! I did see a very faint trace on the waterfall dislay, and tried to use it as accurately as possible. The QRM was particularly bad on 80 meters, and no signals were very strong. The Doppler shift was very pronounced, especially on the weakest signals. It was very educational to watch the frequency shift up and down on the waterfall display as the signal intensified and faded! Once again, this was very educational and fun, and I hope I have continued to improve on the accuracy of my measurements! Many thanks to the volunteer stations who transmitted the signals! I'm looking forward to the next FMT!
|Method: Icom IC-706MKIIG transceiver, MicroHam USB III interface, Apple iBook G4 with FLDIGI Software (v3.20.29). I tried to determine the frequency offset using 2.5, 5, & 10 MHz WWV transmissions. I performed the same measurements on the frequency of each signal from the FMT stations. Then, I found the actual frequency as difference of the measured plus the offset determined by measuring WWV.|
Soapbox: The signals from the FMT stations were great! I missed the first W8KSE transmission because I lost track of time while trying to figure the offset from WWV. But, I was able to measure all the other stations. It will be interesting to see how close I came to the actual frequencies.
|Method: Flexradio SDR1000. Calibration curves obtained from WWV signals. Audio frequency measurements determined using baudline.|
Soapbox: Generally conditions were poor here. Signals averaged about S5. I think that I could do better with better temperature control of oscillator.
|Method: Equipment: SoftRock RxTx6.3/Mobo v4.3 with LVDS 20 ppm Si570 XO; M-Audio D44 Audio card for I/Q interface; Dell Inspiron 510 PC; Software: PowerSDR-IQ 220.127.116.11 by Christos, SV1EIA; WSPR 2.11 FMT by Joe Taylor, K1JT. Used WWV (2.500,5.000,10.000,20.000) and CHU (3.330,7.850) as over-the-air frequency references and performed the measurements per Joe's instructions at http://www.physics.princeton.edu/pulsar/K1JT/FMT_User.pdf|
Soapbox: My first FMT! To listen to the announcements, I used a Flex1500 with a separate PC, sharing a 270 foot Random wire antenna with the SoftRock via a directional coupler.
|Method: Completely homebrew station consisting of vertically polarized balanced loop antennas working into a direct conversion receiver whose LO was phased locked to the incoming carrier. The receiver's LO was measured on a 10-digit frequency counter referenced to a WWVB disciplined frequency standard.
Soapbox: Thanks to everyone for the FMT! The Kp-index rose from 0 to 3 at the time of the FMT. On 80, W8KSE was strongest and most stable, followed by K5CM, and W6OQI. Connie's 160 meter signal was surprisingly strong during the call-up period, but declined a bit during measurement.
|Method: Elecraft K3 with a 50hz filter and Power SDR-IF on a 50Hz filter on CW with a 600Hz pitch|
Soapbox: Could not hear W8KSE on 40m. Also could not hear W6QOI.
|Method: Yaesu FT847, SpecLab, CHU for reference|
Soapbox: Heard all stations well except W6OQI on 40, made out a faint oqi as he signed off. I hope to be close. 73 all
|Method: Icom IC-765, SignaLink USB, SteppIR BigIR vertical. K1JT Method using WSPR based FMT programs. Stations used for calibration: WGN 0.720MHz, WWV 2.500MHz, CHU 3.330MHz, and WWV 5.000MHz. Calibration was performed between each FMT measurement.|
Soapbox: W8KSE on 40m not heard. W6OQI on 40m was at noise floor and was not strong enough to evaluate signal. This was my first time to participate in the FMT.
|Method: Elecraft K3 switching between various antennas, i.e., inverted Vee, inverted "L", and vertical.|
Soapbox: This is my very first attempt to measure my frequency so critically. Interesting.
|Method: Yaesu FT-847 and dipoles, warmed up xcvr. for several hours. checked calibration against WWV.|
Soapbox: FMT is allways fun. Looking forward to next FMT test.
|Method: HP Select Level Meter|
Soapbox: Couldnt hear W8KSE on 40 meters. QRM on K5CM at 3577 and W6OQI at 3567. Enjoyed participation and look forward to the next one. Thanks for all the effort from W8KSE, K5CM, WA6ZTY, and W6OQI to help make this happen. 73s
|Method: WinRadio G31DDC (SDR) Dipole antennas.|
Soapbox: Could not hear W6OQI at all. I noted that on 7054 and 3575 someone was attempting to interfere but the signal to strong here. K5CM and WA6ZTY were both S9 or better.
|Method: Refs:Thunderbolt GPSDO for RF, HP4933A for 404Hz Audio.
Rx= Kenwood TS-440 set for 400Hz BFO. SpecLab and Excel|
Soapbox: My first attempt. Cheap pwr supply for GPSDO QRM'd 160m. Could not hear W6OQI in NCal using 75 ft. wire antenna.
|Method: IC-751 40M OCF at 35ft. Intel P-4 2.8GHz w/ integrated Realtek HD Audio. Utilized K1JT FMT utilities in WSPR for measurements and calibration. Method was direct carrier measurement from rx w/nominal offset. Tools provide dial offset vs frequency based upon measurement of off the air known reference stations. I used WWV at 2.5, 5, and 10Mhz and CHU at 3.330 before and between each FMT sequence. Rx calibration was tracked graphically for several days prior to event and because rx short term drift was approx 1.5Hz across the event time, interpolated dial offset calibrations were used to establish a proper cal at the midpoint of each 3min run. Final measurements are performed post test by averaging the measured apparent frequency samples and applying the interpolated calibration offsets for each sequence. This is different than the standard WSPR FMT method due to the Rx instability at this QTH.|
Soapbox: WOW..I sure learned alot from this test. Used the neat new FMT utilities form K1JT in WSPR. A simple command line toolkit for making multiple measurements, averaging them, and applying an emprically obtained calibration function for the system. After I spent several days analyzing the way my calibration functions drifted around, I realized it was the short term drift in the 751. So devised a strategy to record, and then interpolate the proper slop[e/offset for the fcal function at the mispoint of each FMT sequence. Seems to have at least worked to less than 0.5Hz when testing against the WWV captures between each run. I had alot of noise on W8SKE on 40M..he is very close and I could barely hear him on 40. Much better on 80M. All the other signals were good except 40M from W6OQI..I was surprised to hear him on 80 but not 40. There was strong JT65A QRM W8KSE's 80M signal and it taught me that it is important to be able to tune and filter the radio as quickly as possible to get good S/N info to the soundcard. I am very interested to see how this all worked as this is my first FMT. I will be working to stabilize the master oscillator in the 751 for next time, and am getting up to speed on Spectrum Lab as well.
|Method: Used K1JT's FMT software with an Elecraft K3 and an HP8924C (w/OCXO) as my reference.|
Soapbox: Missed the first TX - not a good start! W6OQI on 40M was just about unreadable, otherwise pretty good reception here in Colorado.
|Method: Icom IC-756, pc, ham radio deluxe with DM780 software. Used WWV and CHU to calibrate.|
Soapbox: First time trying FMT, had a blast. Will try it next year with more preparation.
|Method: Elecraft K3, 80m/40m dipole, AMD Opteron computer running Spectrum Lab V2.7b12. Here's my very crude method:
* Warmed up the equipment for a couple of hours before the test
* Calibrated the K3 to WWV 5MHz (K3 with 1ppm TXCO) Correction factor was to add .43 Hz to all results
* Determined correction to 600Hz for Spectrum Lab
* Took dial reading from the K3 for each test and then added correction value that was calculated from from WWV calibration.|
Soapbox: I just built the Elecraft K3 a few weeks ago and was excited to try out the FMT to see how the performance stacked up to the FT-990 test I did one year ago for the first time.. This is only my second FMT participation. The FT-990 did really well for my first experience with the FMT a year ago but sadly, I am selling it to help subsidize the K3 :-) I could not receive W6OQI on any antenna for 40 meters. There was not hint of his signal to be found on 40m but I heard him just fin on 80m. What's weird is that I had perfect copy of WA6ZTY on 40m. Had fun with the test! Can't wait for the next one.
|Method: Kenwood TS-2000 (CW 1Khz offset), 265' delta loop at 48', Efratom Rubidium Freq std. H/p 8656b Signal Gen. The H/p 8656b signal generator was locked to rubidium freq. std. Monitored signal using Spectran V2 (216), injected signal from signal generator close-into the transmitted signal for calibration. Mesured offset of system using the calibration signal and applied that info to the Transmitted signal minus the 1Khz CW offset.|
Soapbox: Good signal on all bands.
|Method: 110 Foot long home-made 14 gauge THHN wire off-center fed dipole 20 feet high. Ladderline to antenna tuner. HP 3586C selective level meter used as a receiver. Lucent RFTG-m-RB rubidium frequency standard 10 Mhz output connected to HP 3586C external frequency reference input. HP 3586C tracking output frequency sent through an attenuator to tee with antenna input into HP 3586C RF input. Audio output of HP to laptop sound card using Spectran software to find unknown signal and adjust HP 3586C frequency to match. Direct readout of HP for final results with no further correction.|
Soapbox: First time participation in an FMT. First HF antenna ever owned or used---put up two days before the event. I wish I could have received signals from the other stations.
|Method: Icom IC-7800 (stock)
Tuned-in the signal "by ear" and then used the "CW/CW-R" switch to tune to an audible null between the two signals; estimated the 7th decimal place.|
Soapbox: I think this is a great service to the hobby and participation should really be encouraged. We "Amateurs" should strive to be as professional as possible. I was very pleasantly surprised that the signals from OK were the strongest in NJ and that those from OH the weakest.
|Method: IC-7200, Spectran, dipole, WWV|
Soapbox: Lots of QRN on W8KSE on 40 M. S7 on 80 M. The California stations were weak by usable. Many thanks to all of those who provided signals. I look forward to the next one.
|Method: Kenwood TS570 using K1JT FMT and Spectrum Lab.|
Soapbox: Need some tweaking on my FMT batch file.
|Method: Kenwood TS-480S and Digipan v2.0. Dipoles 160/80/40.|
Soapbox: California transmissions S1-3 in noise. W8KSE/K5CM S7-S9+. Minimal Doppler all bands. Thanks to all participating stations.
|Method: RF Space IQ-SDR, IBM T-20 Thinkpad running Spectra-Vue. Direct Frequency Measurement.|
Soapbox: I missed copying the W8KSE 40m signal at 0230.
|Method: Harris RF-350K transceiver and 80M dipole|
Soapbox: Had good signals on 80M but 40M was terrible. W8KSE very weak on 40 and W6oQI was unreadable. Radio does not cover 160 so missed that band. Good to be back for the FMT's as I haven't been able to participate since April.
|Method: Radio K3, ant 3 el @ 55 ft. Lucent Rubidium/GPS freq std and HP 3332B synthesizer/level generator. Used HP 3332B to mark unk freq and then used Spectrum Lab software to measure difference. Unk freq equal to HP 3332B setting plus difference. DM780 used to locate and decode unk freq. Tuned in and then set BW to 100Hz.|
Soapbox: W6OQI week with qrm other sigs strong
|Method: Kenwood TS2000 calibrated against WWV and double checked against CHU and Spectrum Lab software.|
Soapbox: 80m signals were very good, 40m and 160m were very weak. Lots of fun as usual. I am always trying to improve my methods.
|Method: IC-746PRO w / High Stability osc., SpectrumView software.|
Soapbox: W8KSE very weak on 40M. W6OQI very weak on 40M. All others S7 to S9.
|Method: Used a FT-897 and Spectran software on the computer. Set Spectran to narrowest FFT setting and got best guestimate of frequency. Then entered this into an Excel spreadsheet I had made (using WWV and CHU transmissions), to calculate offsets for my particular rig. This determined the final submitted frequency.|
Soapbox: First time participating in the FMT. Missed the early Tx from W8KSE, and couldn't copy W6OQI on 40m. The rest were clearly audible.
|Method: SDR-1000, K1JT FMT software|
Soapbox: First time participant in FMT. W8KSE on 40 was barely audible and did not get good results. W8KSE was S9+ on 80, K5CM was S9+20 on 80, and S7 on 160.
|Method: G5RV feeding a FLEX 3000 RF Amp / Panadapter, HP sig gen (GPS locked I hope) and Spectrum Lab to log.|
Soapbox: Great Test! Thanks to all you Master Stations for the good work and perfect timing. Those were interesting blips from CM. Good signals except the amazing weak signal of W6OQI on 7067, which stayed at the noise level here in the Austin Area. All other signals were easily copyable with a bit of QSB. I got a late start because of my failure to practice with SL and not remembering how to setup GPS lock on the HP. AS always, I’m looking forward to the next one. Ben 73's de NO5K
|Method: Homebrew direct-sampling SDR hardware was used to simultaneously record parts of the HF spectrum around the FMT frequencies, CHU at 3330 and 7850 kHz, and WWV and RWM around 5 MHz.
Afterwards, I measured the received frequencies in deeply zoomed waterfall diagrams made using homebrew SDR software. I used the CHU recording on 7850 kHz to calibrate my receiver (and perhaps also the ionosphere).|
Soapbox: Being in Europe, far away from the transmitters, I could only detect 2 of the 7 transmissions, and those were still so weak that I could not copy their CW identification, so I hope I measured the right signals. Interesting to see a drift of about 0.05 Hz per minute on both W8KSE's and CHU's signal, presumably due to the ionosphere.
|Method: Ft-902DM and HP 3325B. Zero beat the received frequency with the synthesized signal generator. Had the generator calibrated on the WWV signal.|
Soapbox: Strong signals from W8KSE and K5CM on 80m but nothing heard on 160m and 40m. Barely audible signals from W6OQI.Thanks to all involved for conducting this test.
|Method: Dipole to GPS-stabilized TS-850 (500 Hz BW) to sound card FFT software|
Soapbox: W8KSE 40M signal fluttery/wide, others OK. Great sigs from K5CM
|Method: Radio calibrated using fldigi against CHU and then fldigi used to take reading which were plotted and eyeballed for where to average the frequency.
Radio had been on for about 8 hours warming up.|
Soapbox: N.B. There were NO fields on the web form with a red background! This is my first attempt.
|Method: Using a Spectracom 8164 WWVB-disciplined oscillator to drive a decade frequency divider chain, providing 1 kHz harmonic markers to compare with the target signals, and SpectrumLab FFT software to make the comparisons.|
Soapbox: W8KSE on 40 m was very weak here and the California signals were almost as difficult. I still have a little "drift" problem to solve. As always, the FMT was stimulating and fun! Thanks!
|Method: FT-920 with TCXO. Direct frequency measurement.|
Soapbox: Tnx to each of the volunteer stations for conducting the test!
|Method: IC756 Pro Singer CSM-1 with Z3801 Standard|
Soapbox: the most doppler appeared on N-S paths
|Method: Yaesu FT-817nd, Trimble DGPS, Spectrum Lab software, Excel spreadsheet.|
Soapbox: The 40 meter band was NOT my friend this evening. Neither W8KSE nor W6OQI were audible at all! W8KSE was very weak on 80 meters, here in Arizona.
|Method: TS-450/CW (USB) mode with 600 Hz. CW offset bfo frequency. Signal generator and frequency counter (using Lissajous figure) to read ~ 600 Hz. output frequency and increase precision to nearest 0.1 Hz.|
Soapbox: W6OQI 40 m. signal in the noise. All the rest were readable. Thanks again to the FMT volunteers for another good test.
|Method: Flex 3000 with flDigi|
|Method: IC-7800 (locked to Thunderbolt) into Spectrum Lab|
Soapbox: Mother nature provided plenty of "doppler entertainment" and signals ranging from weak readable (W8KSE 40 meter skipping over) to S-meter displacement well over nine (I think it will be OK, if I don't say from where those big signals came!)--- All signals were adequate for acquisition and measurement. Tnx and congratulations to Connie and his support team and the staff at HQ for providing a fun and useful activity!
|Method: K3 w/cwt and the APF feature|
Soapbox: Was going to use the WSPR FMT method but just did not get though the complete test procedure to make use of it..
|Method: SDR-14 DSB and estimate after the one Hz decimal. SDR-14 needs several hours warmup and careful calibration.|
Soapbox: 40 mtr. sigs were weak with heavy QRM especially some digital mode. All stations on 160 and 80 had good level but with QRN . It was fun and may be close on the 160 from K4CM and 80 from W6OQI and 40 from WA6ZTY. Just waiting for more sun spots! 73
|Method: Antenna- 35 ft longwire; Reciver JRC NRD-545 DSP receiver with TCXO; Signal Link Sound Card; Dell Laptop running MixW software.|
Soapbox: Warm up system for 3 hours, calibrated against WWV and CHU frequency standards. Run MixW in PSK mode, with receiver in narrow CW (w/BFO set at 1000Hz). In this contest the "system" calibrated to less than +/- 0.3Hz. Contest: Now set the rcvr to contest frequency, place the MixW flag on the observed tone line on the waterfall display, and let it settkle down for about 30 seconds, and finally observe the BFO audio tone in the little MixW window at the bottom of the page. Formula: Actual Transmit Freq(Hz)= Dial Freq = observed BFO tone - correction. Example; calculation for (W8KSE, 80m) Actual = 3575,000Hz + 433.0 - 1000.1 = 3,574,432.9Hz Note: Unable to receive or measure 40M from W8KSE and 40M from W6OQI '73 de W4RYF
|Method: R&S ESH3 in Freq. Measure Mode to HP 5334A Counter to HP Think Jet
Counter ref HP Z3108A GPS (10 MHz)|
Soapbox: No copy W6OQI 40m
|Method: Flex-3000, Spectrum Lab, and WWV and CHU for calibration. Direct measurement was used.|
Soapbox: Could not receive W6OQI on 40m. Some Doppler evident
|Method: Flex 1500 with scope at 10 second sweep, double side band mode, and filter at -33,+33 hertz. Used panascope on the display.|
Soapbox: Three signals were very weak and QSB. The code was barely readable or worse.
|Method: ocf dipole -> flex1500 K1JT FMT software. reference cal before and after test using WBAP-820, wwv 2.5 5 10, chu 3.33 7.85 any a few other am bdcst stations. No GPS or other calibrations needed.|
Soapbox: All four stations were at least 20 dB out of a -120 dBm noise floor. K5CM was quite load as was W8KSE. The two California stations were off the end of my dipole but still plenty loud for measurments. It all went quite smoothly and, due to temporarily being able to see others results, I think I did pretty well (thanks to K1JT FMT software).
|Method: FT2000, HP3336 with GPSDO, Delta Reference method due to rapid drift of FT2000 LOs.|
Soapbox: Only had time for 4 runs
|Method: I. F. outut of HP3586B selective level meter fed to computer running Spectrum Lab. Spectrum Lab measures the difference between 15625 Hz theoretical I. F. frequency and actual I. F. frequency. This error is then added or subtracted from the frequency indicated on the HP3586B frequency counter. Still looking for a doppler canceller.|
Soapbox: Signals were not as strong as the ARRL April 2010 test but still fun to do and a bit more challenging due to weaker signals. Looking forward to the next ARRL FMT.
|Method: HP Z3801A GPSDO, WaveTek 5135A Synthesizer, Icom IC-756Pro3, Spectrum Lab software, PC w/soundcard. Matched synthesizer frequency to received frequency using tones displayed in spectrum Lab. Recorded synthesizer frequency.|
|Method: Flex 5000, Ribidium standard, fldigi in freq analysis mode. Dial up the frequency in cw mode. Click on the carrier in fldigi. Average the approximate 960 measurements made during minute 5 of the test (fldigi writes these time stamped values to a spreadsheet .csv file). Subtract the extra 600Hz offset that the Flex throws in. Hope for the best!|
Soapbox: A lot of qsb this time. I had a very hard time hearing all of the stations except W6OQI on 80m. In fact trying to hear W6OQI on 40m was impossible as the signal was several db below the noise in a 500Hz cw bandwidth and during the preamble I could not copy the cw at all. However during the test I could barely pick out the signal and fldigi appeared to lock on to it. I think the freq analysis loop bandwidth is a few HZ so I was lucky. The night started out bad and only got worse. Did I mention there was a lot of qsb? Last time (April 2010) I didn't account for the 600Hz offset that the flex throws in on cw mode, made my results really bad, however when (after the fact) I subtracted out the offset, the results weren't that bad. I like the 160 meter test but again, K5CM was just at the noise floor and I was lucky to pick it out at all. The conditions this time of year really stink but I am looking forward to future tests.
|Method: ICOM IC-718, 20-foot long indoor wire antenna.
Use I2PHD's ARGO, QRSS Viewer to collect the data, running Windows 7 on HP computer. Calibration of rcvr and data analysis as K1JT describes, although I did it by hand.|
Soapbox: Could not hear W6OQI on 40 mtrs, the closest station. The some of the others were very weak, but ARGO was amazing in its ability to find and display the signal. A neighbor's internet wifi router caused a lot of radio noise; I might have heard OQI without that interference.
|Method: Equipment Used:: Antenna: 240' dipole and Scorpion screwdriver; Receiver: IC-703 & IC-7000; Frequency Standard: Rubidium 10Ghz; homebrew spliter: 10Ghz input, 10Ghz output and 1000hz output; Signal Generator: R2600; Computer: Dell D820; Software: Windows7, SpectrumLabs 2.76 b8; Excel. Method: Calibration of sound card: Rubidium 10Ghz as source to spliter with 1000hz fed to sound card line-in. Using SpectrumLab calibration software to calibrate the 48000 sample rate. Additionally, the correction factor was calculated. Measurement setup: Rubidium 10Ghz as source to variable signal generator R2600, output of R2600 coupled to antenna input to IC-603. Operation of measurement: the R2600 was set to announced test frequency. Receiver was used to find and tune the FMT carrier signal to be measured. Method of calculation: Output from SpectrumLab was analyzed using Excel. finding the measurement frequency used several techniques; noise, average, and standard deviation, and scatter plots to eliminate outliers and the result multiplied by the "correction factor" to get the final measurement of the carrier. It is worth mentioning that the scatter plot visually demonstrated how all the math was working on the raw data, an excellent validation.|
Soapbox: This is our club entry. The technique differs from individual efforts in how the math was done. The results are almost the same with results being about 0.1 hz different.
|Method: Flex-5000A Spectran software|
|Method: Method: Elecraft K3 calibrated vs. 10 MHz WWV. Measurement by injecting sidetone monitor via "spot" and zero-beating.|
Soapbox: 40M signal from W8KSE was below the noise, so its measurement is unlikely to be accurate. Both signals from W6OQI were weak but hopefully were measured accurately.
|Method: Ten Tec Argonaut V, set to 3575.000 detected audio carrier at 1139 Hz, had to shift the Kenwood TS-440S to 3575.09 to match 1139 Hz audio detection. Not sure if this a valid test. But I thought my TS-440S was off by .10 when matched against a xtal osc.|
Soapbox: In South Western Illinois, I could not hear the first test at 0230 on 40 meters. The 80 meters test at 0245 was strong from W8KSE. (copied the following cw: QST QST de W8KSE calling ARRL FMT)
|Method: Yaesu FT-1000D w/ 0,5ppm TCXO, audio spectrum analyzer and computer calibration procedure|
Soapbox: Poor signal to noise on 40M W8KSE signal degraded accuracy on this measurement.
|Method: HP105B with HB WWVB and GPS calibrators. Icom R-75 rx with HB Slave. HB DSS generator. Tech 465 scope. SpecLab analyzer.|
Soapbox: W8KSE vy weak 40 and S9 on 80. K5CM hard on my S meter both bands, S9++. WA6ZTY S9+ wild doppler. W6OQI in the noise on 80 and not enough to work with on 40. A trying week preceding the test as my main computer failed and had serious problems with my DSS generator. All in all I lived through it and it was fun. Thanks to all for your efforts in making it possible.
|Method: Home brew copy of SDR1000 w/100MHz TCXO, calib'ed to WWV & CHU|
Soapbox: Checked 40M W1AW before FMT, heard them fade out, so figured 40M was dying here...it was. 160 and 80 were OK.
|Method: WJ-8718 Receiver locked to Rb standard, beat note measured with DL4YHF's Spectrum Lab software.|
Soapbox: Poor band condx for this FMT. W8KSE 40m barely detectable, other sigs OK but not great. Lots of Doppler spread. Thanks to ARRL and all transmitting stns.
|Method: HP 3586, HP3336, Tek 465, Trimble GPS standard.|
|Method: ThunderBolt reference, HP 3586B. Dipole antenna and eyball reading of digital display.|
Soapbox: Several of the signals were very weak here in Virginia.
|Method: Transceiver: ICOM 756PROIII, Windows XP PC using Joe Taylor K1JT's FMT Utilities for WSPR 2.11|
Soapbox: This is my first time ever doing the Frequency Measurement test. The FMT utilities worked well even when I could barely hear the signal in the noise. It will be interesting to see how close I measured the test frequencies
|Method: 75A4; HP E4437 sig gen with external HP 10811 OCXO (in another piece of equipment which is continuously on standby) calibrated to WWV; establish 2 to 3 Hz beat and record running count of cycles every 10 sec for as long as I can. Discard intervals I don't like and average the rest.|
Soapbox: This is my first time trying this. I thought I'd try it with what I had. I was flustered and forgot to write down my results for the first transmission at 7055 kHz. (The beat note part of my result was 2.33 Hz.) For similar flustered reasons, 3575 result may be off in the Hz digit, by a small number of exact Hz. WA6ZTY was too weak to measure, and I never heard W6OQI at all on 40m. K5CM on 160 was very weak; I only got 20 seconds of sort of reliable beat note counting.
|Method: HP107 Quartz Oscillator manually disciplined to GPS referencing an HP3325A Synthesizer. Adjusted oscillator for 1KHz beat in IC756 and viewed it on scope against local standard 1KHz output. Can be difficult to zero in since scope tries to lock on various sub-multiples, a 1KHz audio filter would probably help.|
Soapbox: W8KSE was usable on 40 but too weak on 80. K5CM was also weak on 80 but I was able to get a fair signal on 160 with some fading. W6OQI was undetectable on 40 but excellent on 80. The band cdx were poor in comparison to last Aprils FMT, that makes this FMT a fine example of why we have multiple transmitter sites, hopefully everyone was able to hear at least one of us clearly.
|Method: Ten-Tec Argonaut V, Fldigi software, calibrated to WWV and CHU|
|Method: Recorded with Spectrum Lab. Tuned each signal about 3 or 4 Hertz below HP3586B tracking signal. At end of keydown, switched on HP3335A marker set exactly 3 or 4 Hz below HP3586B. Both HP units locked to homebrew GPS/QBASIC 10MHz reference. Played back .WAV with SL, and used Cursor reading on "best" signal point. I barely heard the 160M signal, couldn't measure it. Several signals were spread out about 1Hz by doppler.|
Soapbox: I enjoyed it, Thanks to everyone who made it possible. - bill
|Method: Icom 706Mk2G WSPR 2.11 FMT command line tools.
Cal RX over the air against WWV 2.5MHz, CHU 3.33MHz WWV 5.0 MHz|
Soapbox: Thanks for the FMT exercise. W8KSE 7 MHz was nil here in skip zone W8KSE 3.5 MHz was very QRM with JT65 K5CM 3.5 MHz was very QRM with buckeye CW net I enjoyed it and learned a lot during the process. Next time I'll be more prepared to deal with QRM.
|Method: Icom IC-7200 & CW Sidetone; Checked WWV on 10 & 15 MHz; For test Zero beat sidetone and signal.|
Soapbox: Enjoyed the test; KC5CM on 160 meter so strong had difficulty zero beating the signal in available time; Could not hear WA6ZTY clearly, but think I might have found the signal, but lots of QRM.
|Method: Used K1JT's analysis software (part of WSPR 2.11b), soundcard, and a TS-570D/dipole/vertical.|
|Method: Flex 1500 RX with LPRO-101 Rb reference
Fldigi frequency measurement tool
post-processing of data using various statistical methods|
Soapbox: I was surprised I couldn't hear W6OQI on 40m from my QTH. I have no 160m antenna so not surprised I couldn't hear K5CM on my 80m vertical. W8KSE and WA6ZTY were only about 4dB out of my noise floor on 40m and not copyable on CW. When you see those big frequency excursions from doppler and multipath it makes you wonder why you bother to measure to the nearest 100 uHz.
|Method: IC706MKIIG, Speclab, DDS60 daughter card using trimble GPS clock as reference.|
Soapbox: This is my first attempt at FMT. I put up a temporary HF antenna on tuesday for the test. I could not hear any other signals. I hope to do better next time.
|Method: FT857-D, WWV and CHU markers and Spectran|
Soapbox: first FMT attempt,it was both fun and challenging...S9 noise level on 40 for W8KSE, drift on K5CM 80 signal, unable to copy transmissions from 6-land staions here in NW Indiana