K5CM FMT 0200 UTC March 31, 2017 Thursday evening in Oklahoma
Comments
| Call | Section | Grid | Comments |
| AB2UW | NLI | FN30lu | 80m signal moved +/- ~1Hz during key down! Will be amazed if I get a reasonable result. |
| AF9A | IN | em69 | Big signals this time. 9 +20dB |
| K0WM | CO | DM79jt | Good signals on both bands. Calibated receiver on WWV 5.0 MHz and CHU 7.85 MHz. |
| K3KO | NFL | EM90 | 40M very stable. 80M showed big Doppler oscillation first half of run |
| K3KO | NFL | EM90 | Thanks Connie. Warmup uncovered some mental cobwebs. |
| K5RKS | OK | EM15 | Signal strength 40m = S4; 80M = S6 -- Bands were in "fair" cndition with only moderate noise. Received signals at least 6dB louder than noise floor. Took a number of separate 8 second readings. All of them for any given band within +/- 0.4Hz |
| KA5QEP | OK | EM15mj | Reception using a 45 year old Raytheon 1230 all by itself. Lots of thunderstorm static on 80M. |
| KD5MMM | STX | EL19ds | 40m was weak,could not hear the callup, nice sig on 80m |
| N3IZN | SDG | DM13ji | |
| VE3GSO | ON | EN92ix | Lots of local lightning. S9 signals, but 80m was shifting up and down several Hz. Thanks Connie |
| W2TX | SFL | EL97qw | Thank you for the practice, Connie. Signals on both bands were around 25 uV., plenty good for measurements. There was some spread in frequency on both bands. |
| W3JW | VA | FM17tq | First FMT activity from new QTH. |
| W4WJ | STX | EM00mg | QRN vy bad on 40m. Doppler all over the place. Signal S4. 80m, QRN marginal. Doppler slight. Signal S9. TNX Connie. 73, Don, W4WJ |
| W6BM | EB | Good signal strengths, huge doppler on 80 more than +/-2 Hz on peaks. | |
| W7CQ | ORG | CN83jx | Connie. Great signal strength on both bands. The 80meter signal was spread over 2.5 hz so my report is a BIG guess on 80. Thanks for the trials. Jimmy W7CQ |
| W7PUA | ORE | Good signal strength, but lots of spreading. Interesting to do this with some disturbance up there. Thanks much, Connie, for the extra run. Bob | |
| W9ZB | AL | EM69xp | Strong signals here. Tnx Connie. |
| WA4FJC | VA | FM07 | Thanks Connie |
| WB0LXZ | KS | EM27pj | I needed this. Computer (didn't create file), Thunderbolt (power supply failure), Brain (rusted out) all needed refurbishing. Thanks Connie. -bill |
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Those who copied all transmission to better than .5 Hertz
| Call | Section | Grid | Average PPX |
| W9ZB | AL | EM69 | 1.34E-08 |
| W2TX | SFL | EL97 | 1.51E-08 |
| W7PUA | ORE | 2.02E-08 | |
| N3IZN | SDG | DM13 | 2.25E-08 |
| W3JW | VA | FM17 | 2.63E-08 |
| W4WJ | STX | EM00 | 2.73E-08 |
| KD5MMM | STX | EL19 | 3.56E-08 |
| K5RKS | OK | EM15 | 3.66E-08 |
| WB0LXZ | KS | EM27 | 4.72E-08 |
| K3KO | NFL | EM90 | 5.96E-08 |
| W6BM | EB | 6.16E-08 |
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(0215 UTC, March 31)
K5CM
80 Meters
TX Frequency: 3599048.126
| Call | Section | Grid | Tx Frequency | K5CM 80 | Error in Hz | Error in PPX |
| W9ZB | AL | EM69 | 3599048.126 | 3599048.100 | -0.026 | 7.22E-09 |
| VE3GSO | ON | EN92 | 3599048.126 | 3599048.100 | -0.026 | 7.22E-09 |
| N3IZN | SDG | DM13 | 3599048.126 | 3599048.160 | 0.034 | 9.45E-09 |
| AB2UW | NLI | FN30lu | 3599048.126 | 3599048.170 | 0.044 | 1.22E-08 |
| W3JW | VA | FM17 | 3599048.126 | 3599048.172 | 0.046 | 1.28E-08 |
| W7PUA | ORE | 3599048.126 | 3599048.070 | -0.056 | 1.56E-08 | |
| W2TX | SFL | EL97 | 3599048.126 | 3599048.070 | -0.056 | 1.56E-08 |
| WB0LXZ | KS | EM27 | 3599048.126 | 3599048.010 | -0.116 | 3.22E-08 |
| W4WJ | STX | EM00 | 3599048.126 | 3599048.000 | -0.126 | 3.50E-08 |
| KD5MMM | STX | EL19 | 3599048.126 | 3599048.300 | 0.174 | 4.83E-08 |
| K0WM | CO | DM79 | 3599048.126 | 3599048.372 | 0.246 | 6.84E-08 |
| K5RKS | OK | EM15 | 3599048.126 | 3599048.387 | 0.261 | 7.25E-08 |
| W6BM | EB | 3599048.126 | 3599047.800 | -0.326 | 9.06E-08 | |
| K3KO | NFL | EM90 | 3599048.126 | 3599048.538 | 0.412 | 1.14E-07 |
| AF9A | IN | EM69 | 3599048.126 | 3599047.610 | -0.516 | 1.43E-07 |
| W7CQ | ORG | CN83 | 3599048.126 | 3599047.500 | -0.626 | 1.74E-07 |
| KA5QEP | OK | EM15 | 3599048.126 | 3599046.000 | -2.126 | 5.91E-07 |
| WA4FJC | VA | FM07 | 3599048.126 | 3599028.500 | -19.626 | 5.45E-06 |
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(0200 UTC, March 31)
K5CM
40 Meters
TX Frequency: 7066108.861
| Call | Section | Grid | Tx Frequency | K5CM 40 | Error in Hz | Error in PPX |
| K5RKS | OK | EM15 | 7066108.861 | 7066108.866 | 0.005 | 7.08E-10 |
| K3KO | NFL | EM90 | 7066108.861 | 7066108.828 | -0.033 | 4.67E-09 |
| AF9A | IN | em69 | 7066108.861 | 7066108.940 | 0.079 | 1.12E-08 |
| W2TX | SFL | EL97qw | 7066108.861 | 7066108.757 | -0.104 | 1.47E-08 |
| W4WJ | STX | EM00mg | 7066108.861 | 7066109.000 | 0.139 | 1.97E-08 |
| W9ZB | AL | EM69xp | 7066108.861 | 7066109.000 | 0.139 | 1.97E-08 |
| KD5MMM | STX | EL19ds | 7066108.861 | 7066108.700 | -0.161 | 2.28E-08 |
| W7PUA | ORE | 7066108.861 | 7066108.685 | -0.176 | 2.49E-08 | |
| W6BM | EB | 7066108.861 | 7066108.630 | -0.231 | 3.27E-08 | |
| WA4FJC | VA | FM07 | 7066108.861 | 7066109.100 | 0.239 | 3.38E-08 |
| N3IZN | SDG | DM13ji | 7066108.861 | 7066108.610 | -0.251 | 3.55E-08 |
| W7CQ | ORG | CN83jx | 7066108.861 | 7066108.589 | -0.272 | 3.85E-08 |
| W3JW | VA | FM17tq | 7066108.861 | 7066109.142 | 0.281 | 3.98E-08 |
| WB0LXZ | KS | EM27pj | 7066108.861 | 7066109.300 | 0.439 | 6.21E-08 |
| K0WM | CO | DM79jt | 7066108.861 | 7066109.515 | 0.654 | 9.26E-08 |
| AB2UW | NLI | FN30lu | 7066108.861 | 7066108.180 | -0.681 | 9.64E-08 |
| VE3GSO | ON | EN92ix | 7066108.861 | 7066109.700 | 0.839 | 1.19E-07 |
| KA5QEP | OK | EM15mj | 7066108.861 | 7066110.000 | 1.139 | 1.61E-07 |
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A little different look at the data from Steve, WA9VNJ
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Transmitting equipment used by K5CM for this FMT:
A HP Z3801 GPS frequency source clocks a HP-3336B. The output is feed to a 10 db transistor amp which drives a 12BY7 / pair 6146. Then to a MLA-2500 running about 400 watts. There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the GPS frequency source. 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.
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 to 10,000 second period.
Antennas:
160 - Vertical
80 - Dipole. (favors West, North, East)
40 - Standard Dipole hanging between two 80 foot towers. (favors East, West)
20 - 4el SteppIR at 70'
73,
Connie
K5CM