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April 20, 2012
Actual Radio Frequencies (Hz):
| 80m | 40m | 20m | |
| K5CM | 3,575,268.82 | 7,055,373.17 | 14,055,407.25 |
| W8KSE | 3,575,160.80 | 7,055,280.30 | |
| W6OQI | 3,575,348.23 | 7,055,471.99 | |
| WA6ZTY | 7,055,471.10 |
K5CM/W8KSE/W6OQI/WA6ZTY All (<=1 Hz):
AA6LK, AA8K, AB4RS, AF1E, K0MZ, K0OD, K1GGI, K3JQ, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K7HIL, KA1BQP, KC2QII, KM6QX, KV6O, KX0O, N3UC, N4AU, N5EN, N5LBZ, N5VP, N7EP, N9CYL, NO5K, VE2IQ, W0HBK, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W5EMC, W5NZ, W6OQI, W7KMV, W7KPZ, W8XN, W9ZB, WA1ABI, WA2DVU, WA6VPL, WA8MCD, WB5NHL, WB6BNQ, XQ6FOD
K5CM 80 (<=1 Hz):
AA6LK, AA8K, AB1AV, AB4RS, AF1E, AF9A, K0ANS, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KB2YG, KC2QII, KC8IMB, KD2BD, KD5MMM, KG0HY, KK5J, KM6QX, KV6O, KX0O, N3FG, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3ZRK, W0HBK, W0PHD, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W5PDB, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6RZW, WA6UAT, WA6VPL, WA6ZTY, WA7IRW, WA8MCD, WB3LHI, WB5NHL, WB6BNQ, XQ6FOD
K5CM 80 (>1 to <=5 Hz):
AG2M, AK4SK, K4PO, KU4PY, N2GL, N6SD, N9YKE, VE3OAT, WB8EVI, WZ4CW
K5CM 80 (>5 to <=10 Hz):
WA2USJ
K5CM 80 (>10 Hz):
K9KK, KA3YAN, KD7KDO, W4NUS, W7KBW
W8KSE 80 (<=1 Hz):
AA6LK, AA8K, AB1AV, AB4RS, AF1E, AF9A, AG2M, AK4SK, K0ANS, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K7HIL, KA1BQP, KB2YG, KC2QII, KC8IMB, KD2BD, KD5MMM, KG0HY, KM6QX, KV6O, KX0O, N3FG, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3IGJ, VE3OAT, VE3ZRK, W0HBK, W0PHD, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W5PDB, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6RZW, WA6UAT, WA6VPL, WA6ZTY, WA7IRW, WA8MCD, WB3LHI, WB5NHL, WB6BNQ, XQ6FOD
W8KSE 80 (>1 to <=5 Hz):
K4PO, N6SD, N9YKE, WZ4CW
W8KSE 80 (>5 to <=10 Hz):
KD7KDO
W8KSE 80 (>10 Hz):
KA3YAN, KU4PY, N2GL, W4NUS, W7FU, W7KBW, WA2USJ
W6OQI 80 (<=1 Hz):
AA6LK, AA8K, AB1AV, AB4RS, AF1E, AF9A, K0ANS, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KC2QII, KC8IMB, KD2BD, KD5MMM, KM6QX, KV6O, KX0O, N3FG, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N6SD, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3OAT, W0HBK, W0PHD, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W5EMC, W5NZ, W5PDB, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6RZW, WA6UAT, WA6VPL, WA6ZTY, WA7IRW, WA8MCD, WB5NHL, WB6BNQ, WZ4CW, XQ6FOD
W6OQI 80 (>1 to <=5 Hz):
AG2M, AK4SK, KB2YG, KG0HY, N9YKE
W6OQI 80 (>5 to <=10 Hz):
K4PO
W6OQI 80 (>10 Hz):
KA3YAN, KD7KDO, KU4PY, N2GL, W7KBW, WA2USJ, WB3LHI
K5CM 40 (<=1 Hz):
AA6LK, AA8K, AB1AV, AB4RS, AF1E, AF9A, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KB2YG, KC2QII, KG0HY, KM6QX, KV6O, KX0O, N3FG, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N6SD, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3IGJ, VE3OAT, W0HBK, W0PHD, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W5PDB, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9ZB, WA1ABI, WA2DVU, WA6UAT, WA6VPL, WA8MCD, WB3LHI, WB5NHL, WB6BNQ, XQ6FOD
K5CM 40 (>1 to <=5 Hz):
AG2M, K0ANS, K4PO, KD5MMM, KD7KDO, KK5J, KU4PY, VE3ZRK, W9TJ, WA6ZTY, WZ4CW
K5CM 40 (>5 to <=10 Hz):
N9YKE, WA2USJ
K5CM 40 (>10 Hz):
AK4SK, KA3YAN, N2GL, W4NUS, W7KBW, WA6RZW, WA7IRW, WB8EVI
W8KSE 40 (<=1 Hz):
AA6LK, AA8K, AB4RS, AF1E, AF9A, K0ANS, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KB2YG, KC2QII, KG0HY, KM6QX, KV6O, KX0O, N3FG, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3IGJ, VE3OAT, VE3ZRK, W0HBK, W0PHD, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W5PDB, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6RZW, WA6UAT, WA6VPL, WA6ZTY, WA8MCD, WB3LHI, WB5NHL, WB6BNQ, WZ4CW, XQ6FOD
W8KSE 40 (>1 to <=5 Hz):
AB1AV, AG2M, K4PO, KD5MMM, N6SD, N9YKE
W8KSE 40 (>5 to <=10 Hz):
KD7KDO
W8KSE 40 (>10 Hz):
AK4SK, KA3YAN, KK5J, KU4PY, N2GL, W4NUS, W7KBW, WA2USJ, WA7IRW
W6OQI 40 (<=1 Hz):
AA6LK, AA8K, AB1AV, AB4RS, AF1E, AF9A, K0ANS, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KB2YG, KC2QII, KM6QX, KV6O, KX0O, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N6SD, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3IGJ, VE3OAT, VE3ZRK, W0HBK, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W5PDB, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9ZB, WA1ABI, WA2DVU, WA6RZW, WA6UAT, WA6VPL, WA6ZTY, WA8MCD, WB3LHI, WB5NHL, WB6BNQ, XQ6FOD
W6OQI 40 (>1 to <=5 Hz):
AG2M, K4PO, KD5MMM, KG0HY, N9YKE, W0PHD
W6OQI 40 (>5 to <=10 Hz):
AK4SK, KD7KDO, WZ4CW
W6OQI 40 (>10 Hz):
KA3YAN, KK5J, KU4PY, N2GL, W7KBW, W9TJ, WA2USJ, WA7IRW, WB8EVI
WA6ZTY 40 (<=1 Hz):
AA6LK, AA8K, AB4RS, AF1E, AF9A, K0ANS, K0MZ, K0OD, K1GGI, K3JQ, K3SIW, K5CM, K5RKS, K6APW/7, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KB2YG, KC2QII, KG0HY, KM6QX, KV6O, KX0O, N3UC, N4AU, N5DM, N5EN, N5LBZ, N5VP, N6SD, N7EP, N8YE, N9CYL, NO5K, VE2IQ, VE3IGJ, VE3OAT, VE3ZRK, W0HBK, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W5PDB, W6OQI, W7KMV, W7KPZ, W8XN, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6RZW, WA6VPL, WA6ZTY, WA8MCD, WB3LHI, WB5NHL, WB6BNQ, XQ6FOD
WA6ZTY 40 (>1 to <=5 Hz):
AB1AV, AG2M, AK4SK, K4PO, K7NVH, KD5MMM, KD7KDO, N9YKE, W6SFH, WA6UAT, WZ4CW
WA6ZTY 40 (>5 to <=10 Hz):
[none]
WA6ZTY 40 (>10 Hz):
KA3YAN, KK5J, KU4PY, N2GL, N3FG, W7KBW, WA2USJ, WA7IRW, WI0S
K5CM 20 (<=1 Hz):
7L4IOU, AA6LK, AA8K, AB4RS, AF1E, AG2M, K0MZ, K0OD, K1GGI, K3JQ, K4PO, K5CM, K5RKS, K6APW/7, K6BZZ, K6HGF, K6IQL, K6OQK, K7HIL, KA1BQP, KB2YG, KC2QII, KC8IMB, KM6QX, KV6O, KX0O, N3FG, N3UC, N4AU, N5EN, N5LBZ, N5VP, N7EP, N9CYL, NO5K, VE2IQ, VE3OAT, VE3ZRK, W0HBK, W0PHD, W2FD, W2KKJ, W3GXT, W3JW, W4JLE, W4UK, W5EMC, W5NZ, W6IHG, W6OQI, W6SFH, W7KMV, W7KPZ, W8XN, W9TJ, W9ZB, WA1ABI, WA2DVU, WA6UAT, WA6VPL, WA6ZTY, WA8MCD, WB5NHL, WB6BNQ, XQ6FOD
K5CM 20 (>1 to <=5 Hz):
AB1AV, K0ANS, K3SIW, K7NVH, KD5MMM, KD7KDO, KG0HY, KU4PY, N5DM, N6SD, N9YKE, VE3IGJ, W5PDB, WA2USJ
K5CM 20 (>5 to <=10 Hz):
AK4SK, N2GL, WZ4CW
K5CM 20 (>10 Hz):
KK5J, W7KBW, WA6RZW, WA7IRW
Result Details (n=96):
| Call | QTH | Area | Method/Soapbox | ||||||||||||||||||
| 7L4IOU | DX | DX |
| Soapbox: re-calculated. please replace with a previous report. tnx & 73 | |||||||||||||||||
| AA6LK | CA | W6 |
| Method: HP Z3801A 10MHz reference, 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 Z3801; set 2019 to generate ~400Hz beat, then tune 3325A for minimum phase between it and beat tone, as seen on scope; experimenting with a homebrew PID controller program to automatically lock 3325A to the beat tone. Soapbox: Another well run event; thanks all, and thanks to N5KW for pinch-hitting for W6OQI. K5CM-20M East was S5 and little spreading; K5CM-20M West was S9+ but had noticably more spreading. All other readings had significant spreading, over 0.5Hz; had to eyeball the best correlation between SpecLab and the generator readings to derive a reported value. | |||||||||||||||||
| AA8K | MI | W8 |
| Method: I used Open HPSDR, Flex-Radio's PowerSDR, Trimble Thunderbolt GPSDO, and Spectrum Lab. I offset the HPSDR frequency about 500 Hz to make a tone with the HPSDR BFO, used PowerSDR to make a wave file. I played the wave file back, but discovered that I recorded at 19200 instead of 9600. I played the file back in PowerSDR, used Virtual Audio Cable, and ran Spectrum Lab, noting the offset from the HPSDR frequency. I used a TAPR TADD-2 connected to the GPSDO and receiver as a marker generator to check for DDS tuning word and sound card errors. Antenna: ground-mounted vertical 10 meters high. Soapbox: Signal levels in dBm, all measured on the same vertical antenna: K5CM 20 meter East -87, 20 meter West -105 Noise Floor -120, K5CM 40 meter -58 Noise Floor -110, K5CM 80 meter -83 Noise Floor -115, W8KSE 40 meter -78, N5KW 40 meter -63, WA6ZTY 40 meter -69, W6OQI 80 meter -98. WWV 2.5 MHz -86, 5 MHz -58, 10 MHz -54, 15 MHz -82, 20 MHz -102. CHU 3.3 MHz -61, 7.8 MHz -67, 14.6 MHz -103. | |||||||||||||||||
| AB1AV | NH | W1 |
| Method: Elecraft K2, Spectogram software, W8DIZ 10 MHz standard, homebrew 1kHz PLL/synthesizer, homebrew audio gen w/ digital readout. Used Spectogram to measure audio frequencies of transmitted tone & a nearby tone from PLL/synth, and subtract. Repeat using audio gen to zero-beat each signal as a check. Soapbox: All signals strong in NH. Plenty of time to measure to my limited precision. Enjoyed the opportunity to measure multiple signals. | |||||||||||||||||
| AB4RS | VA | W4 |
| Method: Delta reference method using HP 3336c locked to Trimble Thunderbolt 10 MHz reference to generate a known reference signal. Tuned to AF using Yeasu FT-897d. Analyzed audio with SpectrumLab. Soapbox: Although I am East of K5CM, the west-bound signal was more stable. The east-bound signal exhibited a slew of about 0.15 Hz during the course of the test, while there was no drift and very little spread on the west-bound signal. There appeared to be two components to the W8KSE 40m signal, separated by about 0.25 Hz. All signals were readable, and K5CM was particularly loud, S9+20 on both 20m runs. Thanks to all who made this possible. | |||||||||||||||||
| AF1E | NC | W4 |
| Method: K3 warmed for days, BigIR Vertical, WSPR 2.11/FMT, Signalink USB with Spectrum Lab display but not used for calculations. Calibration with CHU and WWV. Soapbox: First FMT for me. Good signals from all and lots of fun. Learning curve with WSPR/FMT but very easy if planned ahead. Lots of fun. Thanks to the sponsors. | |||||||||||||||||
| AF9A | IN | W9 |
| Method: HPSDR Mercury with 10MHz OCXO calibrated against WWV. | |||||||||||||||||
| AG2M | NY | W2 |
| Method: RCVR Yaesu FT-840 and used Spectran to provide precision of mesurment and WWV & CHU as Ref. to establish correction factor of 7.622240531 PPM (my radio freq is high Soapbox: Great Fun once agn thanks to all participating FMT transmit stations that put in a fine effort. Good signals at my QTH S9+ from all so I've got no excuse there,HI. If I did respectively the old FT-840 will remain in it's long standing place on the operating bench. If not I'll save my pocket change up for KX3, HI. CUL 73, George AG2M | |||||||||||||||||
| AK4SK | FL | W4 |
| Method: Equipment: FT-897D
Method: I tuned to the frequency to which I thought the tone sounded best compared to the SPOT functions and monitored the CW-T lamp on my radio for confirmation. Soapbox: This is my first FMT, no comments. | |||||||||||||||||
| K0ANS | CO | W0 |
| Method: Yaesu FT-817ND with TCXO through a homebrew interface to an Apple iMac runing Cocoamodem 2.0 in PSK31 mode. Soapbox: Oops! I forgot to warm up the receiver before the test. Instead, I used a sliding calibration using measurements of WWV before and after the 40 meter transmissions. | |||||||||||||||||
| K0MZ | KS | W0 |
| Method: The receiver is a Hallicrafters SX-73; transfer oscillator is Drake TR-7; and counter is a Heathkit IM-4100 clocked with an HP10544A OXO. Soapbox: I match the audio tone frequencies strictly by ear. There was a lot of doppler on 40 with W8KSE and WA6ZTY. Also a lot of doppler on 80 with W6OQI. K5CM's 20 meter westbound signal was above the noise while his eastbound signal was at the noise level. I am North of his station so the signal was off the side of the beam. But, it was enough that I could tune it for the counter. | |||||||||||||||||
| K0OD | MO | W0 |
| Method: Flex-5000a alone in panascope view. Radio in DSB mode. Calibrated against CHU immediately before each band. I virtually never turn off my Flex but I swear the thing has virtually zero drift even with a very short warmup. Antenna: DXE 43' vertical Soapbox: For the first time in a FMT I heard every transmission. Most were fairly strong here in St. Louis. No QRM. Very nice test! | |||||||||||||||||
| K1GGI | MA | W1 |
| Method: Heterodyne with oscillator calibrated to gps, measure beat with SpectrumLab. Soapbox: K5CM on 20 east was booming. Solid copy all around. Well-run test. | |||||||||||||||||
| K3JQ | MD | W3 |
| Method: HP 3586B Selective Level Meter locked to Trimble Thunderbolt GPS. Audio output of 3586B input to PC sound card and analyzed with DL4YHF's Spectrum Lab v.2.77b22. To compensate for uncertainties in sound card sample rate and the 3586B's BFO frequency, the system calibrated with measurements of WWV's frequency at 5 and 10 MHz. Soapbox: Doppler shifts of the better part of a Hertz make the measurements somewhat uncertain. Tried to compensate with the measurements of WWV's frequency at 5 and 10 MHz, but not enough data. | |||||||||||||||||
| K3SIW | IL | W9 |
| Method: Triband beam and trap vertical to SDR-IQ receiver; post process the test signals along with marker from sig gen using Spectrum Laboratory, Audacity, and OpenOffice. Calibration based on GPS-locked 10 MHz and 100 kHz signals. Soapbox: First FMT attempt resulted in a number of cockpit errors like forgetting to start data collection until the test period was nearly over. Test signals in general were not strong but QRM/QRN weren't bad. | |||||||||||||||||
| K4PO | AL | W4 |
| Method: Spectran | |||||||||||||||||
| K5CM | OK | W5 |
| Method: For FMT TX: A HP Z3801 GPS frequency source clocks a HP-3336b. A 10 db transistor amp follows and drives a 12BY7 / pair of 6146. The final amplifier runs 400 watts out. There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the GPS frequency source. As a reality check I periodically log the frequency source against WWV/WWVB and other GPS referenced sources.
Antennas: 80 - Dipole slopping down from 140' tower. 40 - Dipole hanging between two 80' towers. 20 - 4 element SteppIR.
For RX: A HP-z3801 drives a PTS-250 for low side injection to a FT-1000D in AM mode. Output is to SL. Soapbox: Mr. Murphy was busy for this FMT. Mike, WA6ZTY lost his primary Synthesizer a couple of days before the test. Fortunately his backup worked. About an hour and half before the test started Marvin found his FMT transmitter would not work on 40 meters. With no backup N5KW transmitted in his place on 40. Mike, W8KSE had a bad cable on his 80 meter equipment, causing about a minute delay in the start of his TX period. Mike,WA6ZTY's keyer died at the last minute, and had to send by hand. After the FMT was over the entry form would not take a 20 meter reading. Bruce, WA7BNM had that fixed in very short order. Other than that the FMT was smooth sailing.... During all of this I was trying to take a few FMT readings of my own. Be interesting to see if I pulled it off..... Hmmmmmmm..... | |||||||||||||||||
| K5RKS | OK | W5 |
| Method: Inject signal into receiver antenna using HP3336B. Set receiver to USB mode. Measure audio frequency of the two tones that are output from the receiver -- one is FMT signal off the air; the other is the injected signal from the HP3336B. An external 10Mhz reference clock is applied to the HP3336B. This 10Mhz reference is provided by a Trimple Thunderbolt GPS Disciplined clock. I am using homebrew software which displays the received tones on a waterfall and also uses an FFT to determine the audio frequency of each of the two received tones. Knowing the audio tone that corresponds to the HP3360 injected frequency, and the audio tone that corresponds to the "off the air FMT signal", along with the RF frequency that the HP3336B is generating enables me to calculate the RF frequency of the "off the air FMT signal".
The basic parameters of my FFT are: samp rate = 8000Hz/sec; Samples per FFT = 65536; Nyquist frequency = 4000Hz, Resolution of FFT (Hz per bin) = 0.12207. The FFT algorithm I am using is taken from classnotes from Stanford University. I have taken the algorithm which was presented using Fortran and ported it to C# which runs on the Visual Studio 2010.
Antenna on 20m = Log Perioidic; Antenna on 40m = Inverted "V" with apex at 40 feet; Antenna on 80m = sloper hanging off the side of 40 foot tower. Rig = ICOM756Pro3. Soapbox: A moderately strong thunderstorm came through between 0200Z and 0245Z. I had a very high noise level with static crashes. K5CM 20 meter signals (both east and west) were S4 to S6. The 40 meter signals ranged from S1 (barely detectable on the waterfall) to S6. On 40 meters K5CM was S6, W8KSE was S1, W6OQI was S6, and WA6ZTY was S3. On 80 meters K5CM was S6, W8KSE was S2, and W6OQI was S1. My noise level on 40m was S8 and my noise level on 60m S9 + 10DB. I enjoyed this FMT. This is the first time I've run the FMT with decent equipment. Last November I entered the FMT without using only my rig withut any specialized test equipment. | |||||||||||||||||
| K6APW/7 | OR | W7 |
| Method: ARGO V calibrated against WWV, beat offset against digital audio generator through an audio hybrid combiner. Soapbox: Good signals. Thanks to all transmitting stations for a good test. | |||||||||||||||||
| K6BZZ | AZ | W7 |
| Soapbox: Major equipment failure after first run. Couldn't recover quickly. | |||||||||||||||||
| K6HGF | CA | W6 |
| Method: 3586B, 3336B, Spectrum Lab, Scope | |||||||||||||||||
| K6IQL | KS | W0 |
| Method: Audio beat method. 75A4 receiver AM mode, RF reference from home brew DDS synthesizer referenced to Rb clock. Spectrum lab used to measure beat tone which is added to RF reference frequency to determine unknown. Data sorted on amplitude and in some cases phase stability, then averaged to determine beat frequency. Amplitude / frequency scatter plots and amplitude vs time plots used to inform my guesses. Soapbox: My thanks again to Connie and the organizers for a fun evening. All signals very good here in KS. Minimal QRM. This was the best FMT format yet. Time allocation very well thought out. Not having to hunt around for each signal a big help and all on one freq tends to keep freq clear. For me, the usual 1.5 hours of panic and 8 hours of data reduction / guessing. Much fun. 73 - john k6iql | |||||||||||||||||
| K6OQK | CA | W6 |
| Method: I used my I.F. method as described at: http://www.k5cm.com/k6OQK%20FMT%20NEW.htm This always seems to work well for me and the Lissajou pattern lets me see the phase shift due to Doppler as well as signal level, so I can see both in a single display. My high dipole as described in the writeup is still down so I'm using a 30' dipole about 5' above the garage roof. Soapbox: Connie's westbound 20-Meter signal had some Doppler, but the eastbound had less so I went with the eastbound reading. I could hear all of the signals with the exception of W8KSE's 80-Meter signal, which apparently skipped over my QTH and landed on Marv's QTH. All of the signals I heard were surprisingly free of Doppler. Marv's IPA croaked on 40-Meters at the last moment, so thanks to Pam, N5KW for filling in on such short notice. This was a great FMT and kept me hopping. Thanks to all who made it possible. _Burt, K6OQK | |||||||||||||||||
| K7HIL | AZ | W7 |
| Method: 7800 GPSDO Soapbox: Second entry - mistake on 20m corrected | |||||||||||||||||
| K7NVH | WA | W7 |
| Method: Yaesu FT-950 warmed up for three days and a Trimble Thunderbolt GPS reference. Recorded half of each transmission in CW LSB and half in CW USB. Then used Spectrum Lab to compare the frequencies between the two. Soapbox: Heard everything but one station on 80m, though a number of stations were too low to pull out of the noise without some effort. My first FMT, and hoping I didn't do too horribly. Looking forward to the next one! | |||||||||||||||||
| K9KK | OK | W5 |
| Soapbox: Severe Thunderstorms accompanied by LOTS of lightning moved in a few minutes before the FMT start. All antennas were then disconnected. Couldn't hear anything anyhow with the high static/noise levels. Thanks to the sponsors for their efforts. See Y'all next time. K9KK | |||||||||||||||||
| KA1BQP | RI | W1 |
| Method: Watkins Johnson WJ-8718A Rcvr, Lucent RFG-M-RB, Spectrum Lab Software Soapbox: Good signals this evening. Thanks guys for another great FMT | |||||||||||||||||
| KA3YAN | SC | W4 |
| Method: Yaesu FT-897D, FLDigi ver. 3.21.40, Tigertronics SignaLink USB, IBM Thinkpad R51 (WinXP Home), Calibrated Ear (attached to my head) Soapbox: I might've made a few mistakes in my measurements. Next year I'll know better what to expect and won't be so quick to record measurements without double checking my numbers. I did receive some training through my State MARS Net. 73! | |||||||||||||||||
| KB2YG | NY | W2 |
| Method: Used Icom receiver on cw mode to receive, zero beated HP 8642B using rubidium reference with incomming signal. Soapbox: This is my first FMT. | |||||||||||||||||
| KC2QII | SC | W4 |
| Method: Flex-1500 with external 10 MHz FE-5680A Rubidium Frequency Standard, PowerSDR 2.3, WSPR 2.11 FMT, 203' Random Wire antenna, 5 feet high. | |||||||||||||||||
| KC8IMB | OH | W8 |
| Method: Yaesu FT-950 - FLDigi in Freq. Anls. mode. Soapbox: Got called away for the 40M session, but got all the other ones. Thanks again. | |||||||||||||||||
| KD2BD | NJ | W2 |
| Method: All homebrew equipment including a quadrature phasing direct conversion receiver, WWVB referenced frequency standard, frequency counter, and H-field loop antennas. Method involved phase locking the receiver's LO to the frequency of the unknown carrier minus a 1 kHz offset. The carrier's frequency is determined by measuring the frequency of the receiver's LO over a 10 second integration period while factoring in the 1 kHz offset, and taking an average of all the readings taken. Full details are available at: http://www.qsl.net/kd2bd/fmt-methodology.html Soapbox: Good signal levels were received from all stations measured, including W6OQI, who was a bit stronger than in November. K5CM's 80-meter carrier drifted about 0.15 Hz higher throughout the keydown period, while W8KSE and W6OQI remained relatively constant. The Kp-index was 3, and all carriers exhibited quick fades with accompanying 180 degree phase shifts. Thanks to all for another great FMT! | |||||||||||||||||
| KD5MMM | TX | W5 |
| Method: FT-847, SpecLab, CHU Soapbox: 20m beaming East was weaker than beaming West, used the West results. Never done FMT on 20 before, not sure if my reference is very accurate. W8KSE and N5KW on 80m were the weakest here, but they were heard. thanks and 73 .. | |||||||||||||||||
| KD7KDO | AZ | W7 |
| Method: Elecraft K2 with filters and sound card to record tone.
WWV for providing calibration reference. Soapbox: TNKS to N5KW for W6OQI 40m test!! | |||||||||||||||||
| KG0HY | NE | W0 |
| Method: WinRadio G313 HF receiver. Used I.F. filter from 400Hz to 100Hz. Calibrated receiver to WWV. Antennas SWL dual dipole at 25 feet and a HF vertical. | |||||||||||||||||
| KK5J | OK | W5 |
| Method: 3586B SLM with indoor antenna. Soapbox: Thanks to all that made this FMT possible. Lots of noise on this end. QRM was also quite annoying on 40 meters. Digital analysis would have significantly improved my results. I know what Im doing this weekend. Thanks again to all those that put in so much effort and I look forward to the next one. | |||||||||||||||||
| KM6QX | CA | W6 |
| Method: Flex-1500 fed by OCF dipole and reference to HP GPSDO. Flex set for 0 Hz IF and 600 Hz pitch CWU mode. VFO/DDS corrections ranged from -0.004 to -0.035. 600 Hz tone analyzed with Spectrum Lab calibrated for Flex-1500’s CODEC A/D sample rate. System accuracy verified against local AM HD broadcast station to be <0.1 mHz. Soapbox: Good signals received from all stations. Doppler shifting was very different on each band: 20m was ~0.55 Hz, 40m and 80m had 1+Hz broad smears. Local CA stations were either easier or impossible to guess. | |||||||||||||||||
| KU4PY | AL | W4 |
| Method: ICOM746 Pro, Butternut vertical. K1JT FMT program. | |||||||||||||||||
| KV6O | CO | W0 |
| Method: Elecraft K3, HP 8924C w/OCXO as local source for calibration, K1JT's FMT tools from WSPR for capture and post-processing. Soapbox: Only my second time doing a FMT - fun stuff! | |||||||||||||||||
| KX0O | MO | W0 |
| Method: Flex-5000a disciplined with Jackson Labs Fury GPSDO to SpectrumLab Soapbox: Second official FMT. 40m was great except smear on WA6ZTY here. 80m signals were a touch weak into MO. Heard all signals though so as long as no math error I should be good. | |||||||||||||||||
| N2GL | OR | W7 |
| Method: HP3586A Selective Level Meter, HP Z3816A GPS Reference, Spectrum Lab Software. Soapbox: Another good test. Little difference between E and W K5CM 20M signals. Thanks to all for setting this up. | |||||||||||||||||
| N3FG | PA | W3 |
| Method: IC-7200, WWV, Spectran Soapbox: Murphy got me with a bad connector during W6OQI's 40M transmission. Otherwise all signals were pretty good. Again, many thanks to all who made the event possible. It was first class as usual. | |||||||||||||||||
| N3UC | VA | W4 |
| Method: HPSDR-Mercury-Metis, EndRun Meridian 10MHz Reference, HPSDR Recorder software, SpectrumLab | |||||||||||||||||
| N4AU | AL | W4 |
| Method: TS570 Kenwood with Speclab and local oscillator reference. Soapbox: Considerable doppler but good signals. Probably multipath. Tried WSPR/FMT, but suspicious readings, decided to use Speclab with spreadsheet, which looked closer. | |||||||||||||||||
| N5DM | TX | W5 |
| Method: TS-480S w/Digipan v2.0. Yagi and dipoles. Soapbox: All transmissions copied in STX. QRN and moderate Doppler on most signals/bands. As always, thanks to all participating stations who make these tests possible. | |||||||||||||||||
| N5EN | TX | W5 |
| Method: HPSDR Mercury receiver and a HP 3336B, both referencing a Thunderbolt GPSDO. I used the 3336B to generate a marker to measure against. Soapbox: First time to try FMT. Total newbie... started learning/planning on Apr 4, 2012. I have no idea if I did the math correctly... but it sure was fun! | |||||||||||||||||
| N5LBZ | MS | W5 |
| Method: homemade xp computer using k1jt joe taylors fmt software radio Harris RF-350K calibrated with hp3325A synth locked to GPS. Soapbox: very good conditions all signals were quite good except for k5cm on 20 and wa6oqi on 80. A couple of stations started a QSO on 20 very close to the test frequency just b4 the start of the fmt. may have confused the software I will be supprised if I come any where near the correct one. | |||||||||||||||||
| N5VP | TX | W5 |
| Method: Receiver : K3 Antenna : Hex beam at 55 feet. Reference generator : HP 3336B Synthesizer/Level Generator slaved to 10MHz from Lucent rubidium/GPS frequency standard.
Used WSPR-fm for frequency measurements of Tx station and Ref. generator tones. Final frequency = ref. freq + difference between tones. Also used Spectrum Lab to monitor band and to see if ref. generator was above or below Tx freq. Soapbox: Signal levels strong, easy copy. | |||||||||||||||||
| N6SD | CA | W6 |
| Method: I used my K3 with an external 10 MHz reference oscillator and P3 pan adapter and an HP 5316A counter with an external reference oscillator connected to the audio output. While in the CW mode I tuned the K3 for a reading of 600 Hz on the counter. The frequency reading on the K3 adjusted for some errors gave the correct frequency. Soapbox: Good signal levels. Thanks to K5CM, W8KSE, W6OQI, and WA6ZTY for another exciting evening. | |||||||||||||||||
| N7EP | WA | W7 |
| Method: WWV, CHU, Spectrum Laboratory, a freqency stable receiver and Lady Luck Soapbox: All signals except K5CM pointing east were strong into Seattle, WA, and easy to find. All except the WA6ZTY 40M signal had at least 1 Hz of Doppler. No difference between K5CM pointing east or west. This was the most intense FMT so far and it really kept me busy. Using the record feature of Spectrum Laboritory really helped as I was able to recheck my measurements after the test. The ARRL FMT's have really improved since K5CM, W8KSE, W6OQI and WA6ZTY are involved. Ward Silver, N0AZ, has had a big hand in the improvements also. Thanks to the ARRL and all you folks for the great FMT. | |||||||||||||||||
| N8YE | OH | W8 |
| Method: Navy surplus R-1051b receiver with an ovenized master oscillator on the synthesizer, Plus the FLDIGI digital program in the "analize" mode. Soapbox: I feel that that the W8KSE 80m frequency is the most accurate because the final digit was fairly stable throughout the 2 minute carrier. We are not that far apart. Regards N8YE | |||||||||||||||||
| N9CYL | WI | W9 |
| Method: ICOM IC-746PRO w/TXCO. Spectrum Lab software. Warmed up PC and rig for one week. Zero beat rig with 10 MHz standard. Soapbox: Good propagation all bands. Weakest was W6OQI at S3, but band was quiet. Best was N5KW on 40M with S9+20 and no QSB. | |||||||||||||||||
| N9YKE | WI | W9 |
| Method: K3 calibrated before and after the contest at three points per band on 1 KHz markers. Ref Cal from Rubidium standard turned off during cal and measurement. Piecewise linear interpolation of measured data. Soapbox: This is my first FMT, very enjoyable. I learned a lot, should do better next time. Strong S7 signals except W6OQI on 80 meters and K5CM on 20 meters. | |||||||||||||||||
| NO5K | TX | W5 |
| Method: Random wire, Flex 1500, HP8920B BFO and Spectrum Lab V2.7b12. Soapbox: This was a long and noise plagued exercise. Thanks to the organizers, it went well! What hitches? | |||||||||||||||||
| VE2IQ | ON | VE |
| Method: Dipole to TS-850 in narrow CW mode, find signal, record audio, average callup, keydown, handover parts, cross fingers. Soapbox: Another enjoyable FMT, thanks to all. Good signals from everywhere. Post-recording analysis is automated by now. | |||||||||||||||||
| VE3IGJ | ON | VE |
| Method: Signal Hound Spectrum Analyser locked to GPS-derived 10 MHz reference | |||||||||||||||||
| VE3OAT | ON | VE |
| Method: Using 10 MHz from GPS, divided down to 1 kHz markers for frequency comparison. Using SpectrumLab with decimation factor = 8 but I don't care for this because it doesn't let me see the instantaneous frequency and amplitude changes (to better judge the Doppler). Soapbox: Good signals from everyone except, understandably, 80m from California. Many thanks to all for your efforts in presenting these challenges to us. | |||||||||||||||||
| VE3ZRK | ON | VE |
| Method: TS-950 / R&S SMY 01 / GPS disciplined TCXO / PC based AF spectrum analyzer / we compared the off air signal to the signal generator output via a coax relay Soapbox: I was joined by VE3BBM and VE3TLY for a fine FMTP (Frequency Measuring Test party). We copied all but the last transmission. VE3IGJ also joined us, but, used his own rig. Many thanks to the event organizers! | |||||||||||||||||
| W0HBK | IA | W0 |
| Method: Direct frequency measurement method, using Yaesu FT-920 with TCXO. Soapbox: All signals were excellent. Thanks to the sponsors for conducting the test! W0HBK, Cedar Rapids, Iowa | |||||||||||||||||
| W0PHD | MN | W0 |
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| W2FD | PA | W3 |
| Method: Kenwood TS-450 with TCXO and 1 Hz. fine dial frequency tuning steps. CW (USB) used with 600 Hz. offset. Audio generator/frequency counter /Lissajous pattern used to measure offset audio frequency output. Dial calibration using WWV 15 MHz. source. Soapbox: Thanks again to Connie and his "crew" for a very good FMT Test. Signals were strong except for W6OQI on 80 meters. I did not notice any large Doppler shift in measured frequency between the K5CM East and K5CM West transmissions on 20 meters. | |||||||||||||||||
| W2KKJ | NY | W2 |
| Method: TS-2000 with fan mod to stop fan cycling + Thunderbolt GPS. Used K1JT FMT software with PC internal sound card. Soapbox: My first time with FMT. I had Windows tasks scheduled for each step - only to find out that the given key down start and stop times are approximate. A struggle with the PC as to who had control! | |||||||||||||||||
| W3GXT | MD | W3 |
| Method: ICOM 7000 transceiver calibrated to WWV and CHU. Antennas Pixel loop and longwire. Spectrum Lab to determine the frequency offset. Soapbox: K5CM 20 meter signals were blasting in. 40 Meter signals were quite stable and easy to work with. The last 2 80 meter signals were just above the noise and it difficult to get a good reading. All in all a good night and fun. Am looking forward to next event. | |||||||||||||||||
| W3JW | VA | W4 |
| Method: IC-7800 (locked to GPSDO) into Spectrum Lab Soapbox: Signal strengths were good to fair with plenty of doppler spread. The difference in the 20 meter east/west frequency measurements, at this QTH, was approximately 15 millihertz with the eastern measuremenet being the lower of the two. | |||||||||||||||||
| W4JLE | SC | W4 |
| Method: Reasonably calibrated Icom 756Pro and FLDIGI.
Using the dual receive capability WWV/CHU tracked with SBSpectrum to determine error per MHz. CHU was really bouncing around due to doppler and multipath. Soapbox: First thanks to K5CM,W8KSE,NK5W and WA6ZTY for your time and efforts to make the FMT possible. Conditions made it tough, especially on 80. I think the signal I copied from W8KSE was the right one, but wouldn't bet the farm on it. Mr. Doppler played havoc with the measurements rapidly moving +/- .4 Hz. K5CM on 40 was a real bear and is a SWAG at best. As always it was fun! | |||||||||||||||||
| W4NUS | NC | W4 |
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| W4UK | SC | W4 |
| Method: Thunderbolt-stabilized Flex 5000a, FLDIGI Soapbox: Doppler shift was typically up to a half-Hz during a run, so my accuracy may be limited to a couple tenths of a Hz. The W6OQI 80M run was too weak here to measure. I continue to wonder if the Doppler shift can be quantified and compensated for. | |||||||||||||||||
| W5EMC | TX | W5 |
| Method: FTdx5000 in CW upper (500 Hz tone)into spectran. Add tone above 500 to Dial reading. Soapbox: Good S/N all stations. Great fun! | |||||||||||||||||
| W5NZ | AL | W4 |
| Method: TS-570 with fldigi for ballpark measurement and SpecLab for more precision. Soapbox: Great sigs from all stations here in AL. Unfortunately, lots of Doppler shift, too. Thanks to all for hosting another great FMT -- looking forward to the next run. | |||||||||||||||||
| W5PDB | OK | W5 |
| Method: Rig was Flex 1500 with HP3330B reference. Panascope with scope at 10 seconds per sweep. DSB with filter at -33hz to +33hz Soapbox: Very weak 20 meter signal. I might have missed it. | |||||||||||||||||
| W6IHG | VA | W4 |
| Method: New Flex 5000a with HP3336. Trying the direct readout this time instead of the usual Delta Reference. Flex VFO corrected from GPA Thunderbolt. Used CW Low mode with Spectrum Lab to read the pitch directly. Soapbox: Only worked k5cm 20m signal because that was all the time I had to play, ugh. | |||||||||||||||||
| W6OQI | CA | W6 |
| Method: HP Z3801B GPS receiver providing 10 MHz reference signal to HP3586B selective level meter. 15625 Hz I.F. output of HP3586B fed to computer running Spectrum Lab. Soapbox: For transmitting the FMT the 10 MHz signal provides a reference for an HP3336B signal generator, the output of which feeds a 60 year old Viking I transmitter as an intermediate power amplifer. The output of the Viking I is passed through a 10 dB pad ahead of an Icom IC-4KL amplifier. Antennas are inverted V antennas for 80 and 40 meters. | |||||||||||||||||
| W6SFH | CA | W6 |
| Method: Receiver is JST-245 on AM. Incoming signal beat with HP83732 whose output is divided by 10 and adjusted for 500 Hz offset as observed with a synchronous detector and 'scope operating at 500 Hz. Residual offset determined by timing with a stopwatch. All local signals derived from GPS disciplined oscillator. Soapbox: K5CM on 20 meters had a strong signal into N. Calif while beaming both east and west. Easy to see a constant slowly rotating phase on the synchronous detector. 40 meter signals from all stations bothered by QRM and QSB. Phase was very erratic, jumping all over the place. W8KSE was weak on 80 meters with QSB. W6OQI was stronger, but beset with QSB. It would be nice to have a good steady ground wave into N. Calif for a change. Looking forward to next time! | |||||||||||||||||
| W7FU | WA | W7 |
| Method: Please accept my recalculation of W8KSE's frequency on 80 meters. Soapbox: Please accept my recalculation of W8KSE's frequency on 80 meters | |||||||||||||||||
| W7KBW | MD | W3 |
| Method: Kenwood TS690S with dipole at 35 feet. ICOM IC-703 Plus with vertical Used different filter bandwidths and attenuation, then tuned for strongest signal. | |||||||||||||||||
| W7KMV | AZ | W7 |
| Method: Receiver: TS-940S, Freq counter:HP-5326A with external 10MHz rubidium time base. Spectrum Lab program to acquire audio logging on PC. Frequency generator: TS-450SAT at 2w into dummy load tapped for frequency counter.
Method: All equipment on at least 10 hours. Set Spectrum lab to report 2 audio peaks in separate but close proximity ranges. Tune in test station with audio tone in upper audio peak range. Set frequency generator for tone in lower audio peak range. Read frequency counter for frequency generated. Read two audio tones and compute unknown test station frequency. Soapbox: Signals were good across the test time with W8KSE weak, but clear on 80M. Adjacent channel interference was not a factor. A fun event to test out equipment and technique. Thanks to all who participated. | |||||||||||||||||
| W7KPZ | OR | W7 |
| Method: ICOM 718, Signalink USB, FLDIGI running on Ubuntu Linux on HP desktop. System's linear error function calculated using WWV as calibration points. Correction then applied to readings for the FMT signals. Soapbox: W8KSE was nearly inaudible on 80meters. Not sure I heard him. Oddly, calibration seemed to slowly drift over the hour. Not sure why. In Oregon, I heard K5CM on 20meters in both Eastern and Western segments. 20M was very quiet. Not the case with 80M, which was very noisy. Good fun and thanks to all. | |||||||||||||||||
| W8XN | MI | W8 |
| Method: RFSpace NetSDR phase locked to Trimble Thunderbolt; using SpectraVue SDR software -- most measurements made at 0.06 Hz RBW. Soapbox: I am resubmitting my entry (4/21/2012) so as to get credit for my 20 M measurement, which I had originally entered into the soapbox when the 20 M textbox failed to take it. | |||||||||||||||||
| W9TJ | IL | W9 |
| Method: Icom R75, hb slave rx to R75, hb DSS gen, HP105B, hb GPS calibrator, hb WWVB rx, Tek 465 scope, 2 computers. I tune signal and zero beat with DSS recording direct freq then introduce fixed 200 hz offset and SpecLab to resolve the final results including Doppler. Soapbox: Signal strengths were good but Doppler shifts made a mess of the results. Plotted the freq lists and found a spread of 0.5 to 0.8 Hz. on some. Makes a fine guessing game. My thank you to all who made the test possible. | |||||||||||||||||
| W9ZB | IN | W9 |
| Method: Averaged phase rotation. Soapbox: 14 MHz signal very weak here east or west, all other band sigs strong with some doppler and QSB. | |||||||||||||||||
| WA1ABI | RI | W1 |
| Method: WJ-8718 Receiver locked to Rb standard, beat note measured with DL4YHF's Spectrum Lab software. Soapbox: Good band conditions and fine copy on all stations. Thanks to ARRL and to all the transmitting stations. Great job of pinch hitting from N5KW. Excellent FMT! Well done, all. | |||||||||||||||||
| WA2DVU | NJ | W2 |
| Method: HP 3586, HP3336, Tek 465 scope, TB GPS. | |||||||||||||||||
| WA2USJ | NY | W2 |
| Method: Used a JRC JST-145 xcvr with an OFC dipole antenna. Soapbox: Signals were good to the east coast. Tnx Connie for doing the FMT!!!! 73 Joe | |||||||||||||||||
| WA6RZW | CO | W0 |
| Method: Hp3586B Comparing IF2 with audio tone. Soapbox: Just to make it more challenging, first 3-4 test done with antenna switch in wrong position. | |||||||||||||||||
| WA6UAT | CA | W6 |
| Method: HP 10811A OCXO,HP E4438 RF synthesizer, 75A-4, 77- Hz bandpass filter, synthesized function generator at 770 Hz, polar phase detector, X-Y scope display, stopwatch. Soapbox: This is a re-submission. I checked the frequency of my standard. I'm near San Francisco. K5CM 20m eastbound was well above the noise, and steady. Westbound had lots of fading, but the identical frequency. | |||||||||||||||||
| WA6VPL | CA | W6 |
| Method: HP Z3801A GPS receiver's 10 MHz output used to discipline HP 8920A comm test set. Wilkinson splitter-combiner used to mix antenna and test set RF. Icom IC-730 receiver set for USB and 2.1 KHz BW. Used Spec Lab application and Sound Blaster Live sound card. Measured difference between marker (test set) and unknown. Soapbox: Used G5RV antenna and heard all transmissions. 20m was heard equally well east and west! Lack of 160m capability here was not a factor for this run. Spec Lab is still a challenge, but each time I use it, it gets easier. Next time I need to spend more time with calibration of Sound Card. However, this time I made a WAV file recording for playback on Saturday. After reducing analysis to +/- 5 Hz, the data seemed to be "better" (more believable)...won't know for sure until the actual frequencies are posted. | |||||||||||||||||
| WA6ZTY | CA | W6 |
| Method: FT-990, HP107BR Quartz Standard, HP3325A synthesizer. Tuned synthesizer across FMT signal looking for zero-beat. Soapbox: My keyer stopped halfway though my FMT transmission, went to handkey in panic mode. K5CM's 20 meter transmission was S-0.5 beaming east and S-5 beaming west. | |||||||||||||||||
| WA7IRW | NV | W7 |
| Method: FT-857 with oven stabilized crystal, Spectrum Lab s/w on old Dell laptop. Calibrated crystal ppm errors against WWV at 5/10/15MHz in USB and sound card errors in AM mode against 500 and 600 Hz tones. Soapbox: Discovered a nonlinearity in SC or setup- two spectrum peaks separated by about 885 Hz and a 2.7 Hz FM on each peak, resulting in 6 or so modulation peaks across a 15 Hz range. May have screwed up 20m measurements by choosing wrong peak. | |||||||||||||||||
| WA8MCD | IL | W9 |
| Method: Icom-7700, FE5680a Rubidium Frequency Standard, FLdigi on HP touch screen. Slooper for 40M & 80m. Cushcraft X7 beam for 20M Soapbox: My first try at this, Lots of fun !!! | |||||||||||||||||
| WB3LHI | NY | W2 |
| Method: Icom 706MkIIG 2 days warm up. SpectrumLab software used to measure against WWV at 5, 10, 15, and 20 MHz. Interpolated to find deviations at 80M, 40M, and 20M. Soapbox: Operator error! Didn't find the 20M signal! | |||||||||||||||||
| WB5NHL | SC | W4 |
| Method: Transceiver was TS-570D without TCXO. Calibration was unchanged from factory. Used Fldigi software in frequency analysis mode. Previously calibrated sound card against WWV per Fldigi procedure. Measured multiple WWV/CHU stations before and after FMT to establish correction factor K=(Fref-Fmeas)/Fref. Simple average of the compute K's. Applied average correction factor to FMT values. Freal=Ffmt/(1-K) Correction factors ranged from 1.1 to 1.3 PPM Soapbox: First ever FMT. Fldigi makes it easy to make a measurement. It will be interesting to see if my correction constant approach works. This technique seems to do much better than the xcvr specifications of 10 PPM. | |||||||||||||||||
| WB6BNQ | CA | W6 |
| Soapbox: really poor propagation here in San Diego, CA. | |||||||||||||||||
| WB8EVI | OH | W8 |
| Method: FT-1000MP, tuning as best I can Soapbox: This si fun. I probably didn't have the rig warmed up long enough though. | |||||||||||||||||
| WI0S | MN | W0 |
| Method: Zero Beat signal into receiver on IC746PRO Soapbox: My first time, very interesting. Hope to participate again. Kieth wi0s | |||||||||||||||||
| WZ4CW | GA | W4 |
| Method: Yaesu FT-897, 80M Carolina Windom, and insight with calculations. Soapbox: Another good FMT - Could hear all stations clearly - 73 to ALL! | |||||||||||||||||
| XQ6FOD | DX | DX |
| Method: I used a TS-450, phase-locked to GPS (not really disciplined, so I get only about 10E-7 short term accuracy, but this improves with averaging), and Spectrum Lab to measure the audio tones. Measured WWV on 5, 10 and 15MHz, before, between and after tests, to attempt Doppler correction by interpolating shifts over time and frequency. Soapbox: All stations were received here in Chile. K5CM was S6 beaming east, and S5 beaming west. On 40 meters, K5CM was S4, W8KSE S2, W6OQI S3, and WA6ZTY about S5 with a lot of fast QSB. On 80 meters all signals were deep down in the noise, with W8KSE not even detectable by ear, but waterfall line was still recognizable. I tried to look for a frequency difference for K5CM beaming east or west on 20m. There might have been a very small difference, like 0.02Hz, higher when beaming west, but I'm not sure at all because my GPS was wandering more than that, Doppler was also shifting down fast, and the signals were scattered about one Hz wide, so the difference I observed might very well be measurement error. A problem for Doppler measurement on WWV was that on 10MHz the WWV signal was overwhelmed by the Brazilian standard station, so I don't know if I managed to compensate for the USA-Chile path, or only for the path from Brazil to Chile... Doppler was positive when the test started, but shifted down fast during the test, with the higher frequencies shifting down fastest. At the end of the test, Doppler at 15 and 10 MHz was negative, but at 5MHz was still slightly positive. Magnitude of Doppler was around 3*10E-8 when the test started. |