K5CM FMT - August 16, 2010 Results
| TX Frequencies | ||
| K5CM | W6OQI | |
| 80M | 3568495.687 | 3568474.358 |
| 40M | 7076551.327 | 7076523.409 |
Stations submitting readings on all possible bands(4) - ranked by average error:
| Call | Section | Grid | Error in PPX |
| K9KK | OK | EM15 | 1.08E-08 |
| WA1ABI | RI | FN41jp | 1.22E-08 |
| W6IHG | VA | FM09 | 1.46E-08 |
| K5BTK | MS | EM42wl | 1.57E-08 |
| K6OQK* | LAX | DM04ud | 1.78E-08 |
| AB4RS | VA | FM18hw | 1.81E-08 |
| AA8K | MI | EN82sx | 3.25E-08 |
| WBØLXZ | KS | EM27pk | 3.40E-08 |
| W9ZB | IN | EM69xp | 3.41E-08 |
| W3JW | VA | FM17tn | 3.43E-08 |
| W9TJ | IL | EM48 | 3.77E-08 |
| VE2IQ | ON | FN15nt | 3.92E-08 |
| K6BZZ | SDG | DM13id | 4.17E-08 |
| N5DM | STX | EL29fs | 4.64E-08 |
| W0HBK | IA | EN42 | 5.89E-08 |
| KØMZ | KS | EM28ix | 6.77E-08 |
| K1GGI | EMA | FN41 | 7.14E-08 |
| N2GL | OR | CN85ko | 9.58E-08 |
| WA4FJC | VA | FM08 | 1.95E-07 |
| K6APW | EB | CM87uv | 2.87E-07 |
| K6HGF | LAX | DM04 | 3.93E-07 |
| W0PHD | MN | EN18oe | 1.11E-06 |
| W2FD | WPA | EN91 | 4.89E-06 |
| KB3MUN | WPA | FM19cv |
*May be in ground wave/direct range of W6OQI
A look at all readings 10 millihertz or better:
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| K5CM 80 | ||||||
| W4UK | SC | EM93an | 3568495.687 | 3568495.69 | 0.003 | 8.41E-10 |
| K9KK | OK | EM15 | 3568495.687 | 3568495.684 | -0.003 | 8.41E-10 |
| W3JW | VA | FM17tn | 3568495.687 | 3568495.696 | 0.009 | 2.52E-09 |
| K5CM 40 | ||||||
| N3FG | EPA | FM29 | 7076551.327 | 7076551.32 | -0.007 | 9.89E-10 |
| W6OQI 80 | ||||||
| WA1ABI | RI | FN41jp | 3568474.358 | 3568474.355 | -0.003 | 8.41E-10 |
| W6OQI 40 | ||||||
| K6OQK | LAX | DM04ud | 7076523.409 | 7076523.413 | 0.004 | 5.65E-10 |
*May be in ground wave/direct range of W6OQI
It seems most everyone had fun with this format. I know it was interesting for Marvin and I to transmit the FMT. We had to deal with timing and sequencing issues. Although it did not happen this time we were concerned about possible QRM at the last minute causing us both to move to a new frequency within 50 Hz of each other. Despite the lack of a key down period there were still many good readings with several less than 10mHz readings. This was a good real world test.
Thanks to all who participated !
Connie, K5CM
Comments
| N8OB | OH | EN80 | A much different way to measure frequency. Still lots of fun. |
| W0HBK | IA | EN42 | Challenging test with the QRN level, however strong signals from both K5CM & W6OQI made measurements possible. Thank you for sponsoring the test! W0HBK, Cedar Rapids, Iowa |
| W9ZB | IN | EM69xp | Good idea, Connie, TNX. I need a different technique for it, though, because I could only get to nearest .1 Hz readings on the slow Morse. Signals were good from K5CM, weak with fading and Doppler on W6OQI, but usable. |
| W0PHD | MN | EN18oe | |
| KØMZ | KS | EM28ix | Thanks Connie and Marvin for a dynamic FMT. Marvin's 40 meter sig was about S9 while Connie's was just above the noise. Connie's 80 meter signal was a good 40 over while Marvin's was about S9 or so. Lots of QRN both bands, more QRM on 80. Measuring the two different frequencies by ear was very easy by just manually moving the transfer oscillator for each correct pitch. This was fun. Good real world test. |
| AB4RS | VA | FM18hw | Enjoyable as always. Had S9 noise on both bands, but K5CM was loud and clear, and W6OQI was clear and readable. Used a HP3336C locked to a Trimble Thunderbolt to inject a known reference signal. Tuned RF with a Yaesu FT897d, recorded audio and did post-processing with Spectrum Lab |
| N2GL | OR | CN85ko | Great fun. GPSDO referenced HP3335A Synthesizer set 600Hz higher than test signals. Looked for beat in SpectrumLab display at 600.02Hz calibrating out sound card error. Hope I did the math correctly this time. Looking forward to the next FMT. Thanks Connie; great fun. |
| WA1ABI | RI | FN41jp | Good signals, bad Doppler. This format was interesting and challenging. Tnx Connie and Marvin. |
| WA4FJC | VA | FM08 | Well another challenge. Using Thunderbolt, HP 3586B and Spectrum lab that went mostly deaf just befor the event. Ah well it was fun. Keep up the good work. 73 Gordon |
| N5DM | STX | EL29fs | Kenwood TS-480S and DigiPan v2.0. QRN S9+25 TSTMS in SE La. Doppler significant on both bands. Thanks to K5CM and W6OQI. |
| KB3MUN | WPA | FM19cv | Toolchain: 2m 1/4wave to TS-140 to FLdigi.Signals faint, sometimes barely making trace on FLdigi waterfall, could hear that it was CW. As the CW was not decodable, I could not tell which signal was whose, so I reported K5CM as the lower freq in each case. The 80m QSO I listened to was probably not the FMT QSO--I quit listening at 23:19 EDT but was able to decode something about "raising antenna 10-15 feet" and "inverted L" at about 23:18.Thanks for a fun and challenging FMT format. |
| K6OQK | LAX | DM04ud | Back in the dark ages before Connie started our regular FMT's, Marv W6OQI, Stu K6YAZ and I used to sit on the phone measuring CW stations on 40 Meters and comparing measurements and techniques, so this is sorta old hat. I did not have the advantage of using Spectrum Lab this time so I wasn't able to average the transmissions. We'll see how I do using only my Lissajou pattern technique. Thanks to Connie and Marv for this FMT format. This is more of a challange but certainly not without it's rewards and satisfaction. Burt, K6OQK |
| K6HGF | LAX | DM04 | This is a hard way to make measurements! Timing between Connie & Marv was excellent. Thanks for the FMT. |
| W2FD | WPA | EN91 | Signals were not very strong from Marvin, W6OQI but strong enough to make a measurement. I now know why the FMT tests are so interesting and enjoyable to me. If you don't have sophisticated frequency sources and a very stable receiver, you can make the technical measurements and --like playing the lottery, you can hope that the results will turn out great ! The format of this test was interesting and it was apparent that the slower speed CW (W6OQI) was easier to measure. Thanks again Connie and Marvin for your efforts. |
| WBØLXZ | KS | EM27pk | Thanks for the contest. Very interesting, in each case one very strong signal communicating with a very weak one. My habit is to take notes in the evening, and do the calculations in the morning. Often my notes are not as complete as I thought. I hope I got the signals matched with their calls. -Bill |
| K5BTK | MS | EM42wl | |
| K6APW | EB | CM87uv | Signals good, measurement tough (by my method)! |
| K7TT | WWA | CN87wl | Good signals on 40M. I listened on 80M but there were no signals readable on 80M whatsoever, just very high noise level. |
| W4UK | SC | EM93an | Missed the 40 M run. Thanks for the FMT. |
| K6BZZ | SDG | DM13id | Good signals with some qsb. A little trickier without a key down period. Your timing was spot on. That was fun to watch. Thanks for running the test. |
| AA8K | MI | EN82sx | Peak signal levels received in dBm: K5CM 40M -58, K5CM 80M -82, W6OQI 40M -72, W6OQI 80M -92. Antenna: ground-mounted vertical 20 meters high. I used only Open HPSDR, Thunderbolt GPSDO, and Spectrum Lab. I offset HPSDR about 500 Hz to make an tone with its BFO, used PowerSDR to make a wave file. Play the wave file back and run Spectrum Lab, note the offset from the HPSDR frequency. |
| W9TJ | IL | EM48 | Marvin took honors on 7 mhz with 9+10 signals while I dug for Connie. 80 mtrs was the other way around with Connie at 9+30 while I dug for Marvin. Frequencies were a joke with doppler swinging over 0.5 hz at times and considerable difference between start and ending. It was fun but frustrating. Thank you very much for your efforts. 73 Tom |
| W6IHG | VA | FM09 | Different and lots of fun. OQI signals weak in VA. Using Delta reference method with HP3336 and FT2000 (which has a terrible vfo for drifting). Thanks Connie and Marv. Almost forgot I needed to know whose signal each of the frequencies belonged to. Hopefully I got it right. Jerry, W6IHG |
| VE2IQ | ON | FN15nt | That was fun - processed each xmsn separately then avgd them. Sidebands no help to eliminate propagation effects. Tnx |
| K1GGI | EMA | FN41 | Anybody not clued in must have thought you guys were nuts... o, you are. Hope to be within a few tenths this time. Fun for a summer's eve. Ed, your just tooooo funny hi hi........ but hmmmmm.... maybe your right.... CM |
| W3JW | VA | FM17tn | Good signals from both stations on both 40 and 80 M. The signals on 40 M were noticeably stronger but all were measurable. Plenty of atmospherics and Doppler to keep things interesting. For this format the frequency counters could be kept in storage (except for the "very fast" ones---Hi. Spectran and SL provided the signal acquisition and frequency measurement functions respectively here. Tnx to both you and Marvin for a good FMT. |
| K9KK | OK | EM15 | Fantastic FMT-- Really liked & enjoyed the different format. On 40M W6OQI strong & K5CM weak. On 80M just the opposite in central Oklahoma. Used GPS disciplined generator & SL & HF RCVR. K5CM & W6OQI were synchronized very well. Thanks guys !!!! |
| N3FG | EPA | FM29 | Thanks again. Lots of fun. |
K5CM 80 Meter
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| W4UK | SC | EM93an | 3568495.687 | 3568495.69 | 0.003 | 8.41E-10 |
| K9KK | OK | EM15 | 3568495.687 | 3568495.684 | -0.003 | 8.41E-10 |
| W3JW | VA | FM17tn | 3568495.687 | 3568495.696 | 0.009 | 2.52E-09 |
| K5BTK | MS | EM42wl | 3568495.687 | 3568495.7 | 0.013 | 3.64E-09 |
| VE2IQ | ON | FN15nt | 3568495.687 | 3568495.646 | -0.041 | 1.15E-08 |
| WA1ABI | RI | FN41jp | 3568495.687 | 3568495.729 | 0.042 | 1.18E-08 |
| W6IHG | VA | FM09 | 3568495.687 | 3568495.729 | 0.042 | 1.18E-08 |
| AB4RS | VA | FM18hw | 3568495.687 | 3568495.73 | 0.043 | 1.20E-08 |
| W9TJ | IL | EM48 | 3568495.687 | 3568495.74 | 0.053 | 1.49E-08 |
| K6BZZ | SDG | DM13id | 3568495.687 | 3568495.607 | -0.080 | 2.24E-08 |
| W9ZB | IN | EM69xp | 3568495.687 | 3568495.6 | -0.087 | 2.44E-08 |
| K6OQK | LAX | DM04ud | 3568495.687 | 3568495.588 | -0.099 | 2.77E-08 |
| WBØLXZ | KS | EM27pk | 3568495.687 | 3568495.58 | -0.107 | 3.00E-08 |
| AA8K | MI | EN82sx | 3568495.687 | 3568495.8 | 0.113 | 3.17E-08 |
| KØMZ | KS | EM28ix | 3568495.687 | 3568495.5 | -0.187 | 5.24E-08 |
| N5DM | STX | EL29fs | 3568495.687 | 3568495.5 | -0.187 | 5.24E-08 |
| WA4FJC | VA | FM08 | 3568495.687 | 3568495.49 | -0.197 | 5.52E-08 |
| N2GL | OR | CN85ko | 3568495.687 | 3568495.433 | -0.254 | 7.12E-08 |
| W0HBK | IA | EN42 | 3568495.687 | 3568496 | 0.313 | 8.77E-08 |
| W0PHD | MN | EN18oe | 3568495.687 | 3568495.24 | -0.447 | 1.25E-07 |
| K1GGI | EMA | FN41 | 3568495.687 | 3568496.14 | 0.453 | 1.27E-07 |
| W2FD | WPA | EN91 | 3568495.687 | 3568493.9 | -1.787 | 5.01E-07 |
| K6APW | EB | CM87uv | 3568495.687 | 3568493.5 | -2.187 | 6.13E-07 |
| K6HGF | LAX | DM04 | 3568495.687 | 3568492.38 | -3.307 | 9.27E-07 |
| KB3MUN | WPA | FM19cv | 3568495.687 | 3566951 |
K5CM 40 Meter
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| N3FG | EPA | FM29 | 7076551.327 | 7076551.32 | -0.007 | 9.89E-10 |
| WBØLXZ | KS | EM27pk | 7076551.327 | 7076551.3 | -0.027 | 3.82E-09 |
| K5BTK | MS | EM42wl | 7076551.327 | 7076551.3 | -0.027 | 3.82E-09 |
| W9TJ | IL | EM48 | 7076551.327 | 7076551.37 | 0.043 | 6.08E-09 |
| AB4RS | VA | FM18hw | 7076551.327 | 7076551.384 | 0.057 | 8.05E-09 |
| K9KK | OK | EM15 | 7076551.327 | 7076551.393 | 0.066 | 9.33E-09 |
| W9ZB | IN | EM69xp | 7076551.327 | 7076551.4 | 0.073 | 1.03E-08 |
| AA8K | MI | EN82sx | 7076551.327 | 7076551.4 | 0.073 | 1.03E-08 |
| VE2IQ | ON | FN15nt | 7076551.327 | 7076551.429 | 0.102 | 1.44E-08 |
| W0PHD | MN | EN18oe | 7076551.327 | 7076551.22 | -0.107 | 1.51E-08 |
| W3JW | VA | FM17tn | 7076551.327 | 7076551.469 | 0.142 | 2.01E-08 |
| WA1ABI | RI | FN41jp | 7076551.327 | 7076551.472 | 0.145 | 2.05E-08 |
| W6IHG | VA | FM09 | 7076551.327 | 7076551.475 | 0.148 | 2.09E-08 |
| N5DM | STX | EL29fs | 7076551.327 | 7076551.5 | 0.173 | 2.44E-08 |
| K6OQK | LAX | DM04ud | 7076551.327 | 7076551.092 | -0.235 | 3.32E-08 |
| K7TT | WWA | CN87wl | 7076551.327 | 7076551.564 | 0.237 | 3.35E-08 |
| K6APW | EB | CM87uv | 7076551.327 | 7076551.6 | 0.273 | 3.86E-08 |
| K6BZZ | SDG | DM13id | 7076551.327 | 7076551.604 | 0.277 | 3.91E-08 |
| N2GL | OR | CN85ko | 7076551.327 | 7076551.05 | -0.277 | 3.91E-08 |
| K1GGI | EMA | FN41 | 7076551.327 | 7076551.71 | 0.383 | 5.41E-08 |
| N8OB | OH | EN80 | 7076551.327 | 7076551.981 | 0.654 | 9.24E-08 |
| W0HBK | IA | EN42 | 7076551.327 | 7076552 | 0.673 | 9.51E-08 |
| W2FD | WPA | EN91 | 7076551.327 | 7076550.3 | -1.027 | 1.45E-07 |
| KØMZ | KS | EM28ix | 7076551.327 | 7076552.5 | 1.173 | 1.66E-07 |
| WA4FJC | VA | FM08 | 7076551.327 | 7076553.45 | 2.123 | 3.00E-07 |
| K6HGF | LAX | DM04 | 7076551.327 | 7076548.312 | -3.015 | 4.26E-07 |
| KB3MUN | WPA | FM19cv | 7076551.327 | 7076480 |
W6OQI 80 Meter
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| WA1ABI | RI | FN41jp | 3568474.358 | 3568474.355 | -0.003 | 8.41E-10 |
| K6OQK* | LAX | DM04ud | 3568474.358 | 3568474.323 | -0.035 | 9.81E-09 |
| AB4RS | VA | FM18hw | 3568474.358 | 3568474.282 | -0.076 | 2.13E-08 |
| K9KK | OK | EM15 | 3568474.358 | 3568474.275 | -0.083 | 2.33E-08 |
| W6IHG | VA | FM09 | 3568474.358 | 3568474.272 | -0.086 | 2.41E-08 |
| W0HBK | IA | EN42 | 3568474.358 | 3568474.500 | 0.142 | 3.98E-08 |
| KØMZ | KS | EM28ix | 3568474.358 | 3568474.500 | 0.142 | 3.98E-08 |
| K5BTK | MS | EM42wl | 3568474.358 | 3568474.500 | 0.142 | 3.98E-08 |
| W3JW | VA | FM17tn | 3568474.358 | 3568474.507 | 0.149 | 4.18E-08 |
| AA8K | MI | EN82sx | 3568474.358 | 3568474.200 | -0.158 | 4.43E-08 |
| WBØLXZ | KS | EM27pk | 3568474.358 | 3568474.180 | -0.178 | 4.99E-08 |
| K6BZZ | SDG | DM13id | 3568474.358 | 3568474.122 | -0.236 | 6.61E-08 |
| N5DM | STX | EL29fs | 3568474.358 | 3568474.600 | 0.242 | 6.78E-08 |
| W9ZB | IN | EM69xp | 3568474.358 | 3568474.100 | -0.258 | 7.23E-08 |
| K1GGI | EMA | FN41 | 3568474.358 | 3568474.650 | 0.292 | 8.18E-08 |
| W4UK | SC | EM93an | 3568474.358 | 3568474.020 | -0.338 | 9.47E-08 |
| VE2IQ | ON | FN15nt | 3568474.358 | 3568473.998 | -0.360 | 1.01E-07 |
| W9TJ | IL | EM48 | 3568474.358 | 3568473.990 | -0.368 | 1.03E-07 |
| W0PHD | MN | EN18oe | 3568474.358 | 3568473.840 | -0.518 | 1.45E-07 |
| K6HGF | LAX | DM04 | 3568474.358 | 3568474.940 | 0.582 | 1.63E-07 |
| N2GL | OR | CN85ko | 3568474.358 | 3568473.600 | -0.758 | 2.12E-07 |
| WA4FJC | VA | FM08 | 3568474.358 | 3568475.150 | 0.792 | 2.22E-07 |
| K6APW | EB | CM87uv | 3568474.358 | 3568473.500 | -0.858 | 2.40E-07 |
| W2FD | WPA | EN91 | 3568474.358 | 3568514.100 | 39.742 | 1.11E-05 |
| KB3MUN | WPA | FM19cv | 3568474.358 |
*May be in ground wave/direct range of W6OQI
W6OQI WC40 Meter
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| K6OQK* | LAX | DM04ud | 7076523.409 | 7076523.413 | 0.004 | 5.65E-10 |
| W6IHG | VA | FM09 | 7076523.409 | 7076523.397 | -0.012 | 1.70E-09 |
| K9KK | OK | EM15 | 7076523.409 | 7076523.341 | -0.068 | 9.61E-09 |
| W0HBK | IA | EN42 | 7076523.409 | 7076523.500 | 0.091 | 1.29E-08 |
| KØMZ | KS | EM28ix | 7076523.409 | 7076523.500 | 0.091 | 1.29E-08 |
| K5BTK | MS | EM42wl | 7076523.409 | 7076523.300 | -0.109 | 1.54E-08 |
| WA1ABI | RI | FN41jp | 7076523.409 | 7076523.298 | -0.111 | 1.57E-08 |
| K7TT | WWA | CN87wl | 7076523.409 | 7076523.523 | 0.114 | 1.61E-08 |
| K1GGI | EMA | FN41 | 7076523.409 | 7076523.570 | 0.161 | 2.28E-08 |
| W9TJ | IL | EM48 | 7076523.409 | 7076523.220 | -0.189 | 2.67E-08 |
| W9ZB | IN | EM69xp | 7076523.409 | 7076523.200 | -0.209 | 2.95E-08 |
| VE2IQ | ON | FN15nt | 7076523.409 | 7076523.196 | -0.213 | 3.01E-08 |
| AB4RS | VA | FM18hw | 7076523.409 | 7076523.191 | -0.218 | 3.08E-08 |
| N3FG | EPA | FM29 | 7076523.409 | 7076523.140 | -0.269 | 3.80E-08 |
| K6BZZ | SDG | DM13id | 7076523.409 | 7076523.132 | -0.277 | 3.91E-08 |
| N5DM | STX | EL29fs | 7076523.409 | 7076523.700 | 0.291 | 4.11E-08 |
| AA8K | MI | EN82sx | 7076523.409 | 7076523.100 | -0.309 | 4.37E-08 |
| WBØLXZ | KS | EM27pk | 7076523.409 | 7076523.040 | -0.369 | 5.21E-08 |
| K6HGF | LAX | DM04 | 7076523.409 | 7076523.005 | -0.404 | 5.71E-08 |
| N2GL | OR | CN85ko | 7076523.409 | 7076522.980 | -0.429 | 6.06E-08 |
| W3JW | VA | FM17tn | 7076523.409 | 7076523.925 | 0.516 | 7.29E-08 |
| WA4FJC | VA | FM08 | 7076523.409 | 7076524.850 | 1.441 | 2.04E-07 |
| K6APW | EB | CM87uv | 7076523.409 | 7076521.600 | -1.809 | 2.56E-07 |
| KB3MUN | WPA | FM19cv | 7076523.409 | 7076530.000 | 6.591 | 9.31E-07 |
| N8OB | OH | EN80 | 7076523.409 | 7076551.737 | 28.328 | 4.00E-06 |
| W0PHD | MN | EN18oe | 7076523.409 | 7076552.920 | 29.511 | 4.17E-06 |
| W2FD | WPA | EN91 | 7076523.409 | 7076578.400 | 54.991 | 7.77E-06 |
*May be in ground wave/direct range of W6OQI
Audio snippets by WA1ABI
audio/aug 16-2010/k5cm-w6oqi-by-abi-aug16-2010_40m.wav
audio/aug 16-2010/k5cm-w6oqi-by-abi-aug16-2010_80m.wav
Audio snippet by W0PHD
audio/aug 16-2010/k5cm-w6oqi-by-phd Aug16-2010-80m.mp3
Spectrograph of W6OQI / K5CM 40 Meter signals
Transmitting equipment used by K5CM for this FMT:
A HP Z3801 GPS frequency source clocks a HP-3336B. A 10 db transistor amp follows and drives a 12BY7 / pair 6146. Then to the final amplifier, a Dentron 2500 running 350 watts out on 80, 40 meter. 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 and other GPS referenced sources. I monitor each transmission with a completely separate receive system to look for any instability or short term drift. The separate system is not locked to the GPS transmitting system, but to another GPS source.
I typically see considerably less than 1 mHz difference at 10 Mhz when comparing two Z3801's or a Z3801 and a Thunderbolt, over a 10 to10,000 second period.
Antennas:
80 - Sloping dipole dipole. (favors West, North, East)
40 - Standard Dipole hanging between two 80 foot towers. (favors East, West)
Current W6OQI FMT transmitting equipment for this FMT:
My Transmitting setup consists of a HP Z3801 clocking a HP 3336B which drives a Johnson Viking I transmitter, the output of which is attenuated by a 6 db attenuator, to then drive an Icom PW-1 amplifier to about 500 watts. The antenna is an inverted Vee which favors north and south from the Los Angeles area.
Note: Because I put the results up quickly, there will be mistakes, so don't hesitate to point them out quickly.
73,
Connie
K5CM