K5CM FMT March 02 and 03 2014 (8:00 PM CST)
TX Frequencies for March 02
K5CM - 7052907.562 Hz 14121037.247 Hz
Comments
| W0HBK | IA | EN42 | FT-920 W/TCXO,direct measurement. Sigs 579 here in Cedar Rapids, IA. Lots of doppler. Tnx agn Connie! |
| WA4FJC | VA | FM07 | Busy bands tonight. Strong signals here in VA. TNX Connie.73 Gordon |
| W9ZB | IN | EM69xp | No copy here on 14MHz. Took awhile to find 7MHz Sig (1100 Hz lower than where I was looking). |
| W0HBK | IA | EN42 | FT-920 W/TCXO. Direct measurement. Sigs 579 hr in Cedar Rapids, IA. Lots of doppler on both bands. TNX agn Connie! |
| K6APW/7 | OR | CN93eq | Signals S9 both bands -- set up not even close to ideal. Using the SSB K2 receiver in CW mode and a homebuilt granular DDS with only nominal crystal reference. Fun challenge. Thanks, Connie. |
| k4dsp | NC | fm05 | |
| N2GL | OR | cn85kp | Great signals Connie, but I temporarily lost audio to my Spectrum Lab PC during the 14MHz test and had to interpolate with just the signal level meter. TNX |
| K7HIL | AZ | DM42ph | Main RX to Carolina Windom and Sub RX to SteppIR (Yagi). Signals tracked each other well. 20M was a sign wave with a period of about a minute, while 40M had a steady upward slope of about 6 mHz / minute. Doppler reigns! Thanks for the test Connie, always appreciated. Michael / K7HIL |
| K3KO | NC | FM06 | Thanks for the impromptu FMT. Tried two parallel paths using same antenna, different RX, different sound cards, computer and Spectrum Lab FFT parameters. Objective is to later put an opposite polarity antenna on the second path. Was surprised how well the two paths agreed. |
| AB4RS | VA | FM18hw | Just a very quick attempt, since I only read the email notice shorty before the test. After chasing the short to bed I fired up the HP 3586 and tried to remember how to use it. I was participating in a local VHF emergency comm. net at the same time. I hope I had it synced to the 10 MHz from the Trimble Thunderbolt. I sampled the audio directly from the 15625 Hz IF of the HP 3586, and processed it with SpectrumLab to calculate the offset from the dial frequency. With any luck I will have gotten the signs right, and be somewhere in the ballpark. On the other hand I could be way off in the weeds. It's good to be back in the saddle again. |
| K6BZZ | AZ | DM33xb | Thanks Connie. |
| KM6QX | EB | CM87 | I did not hear Connie's signal on either band, but Spectrum Lab did do a fine job of depicting his snow storm. :( |
| K1GGI | EMA | FN41 | |
| K5XL | NTX | EM12kp | 20 meter signal was very erratic with a frequency swing of 1 hertz. Mr Doppler couldn't make up his mind! 40 meter signal was fairly steady with 50 millihertz swing. I used a Flex-1500 with GPSDO and Spectrum Lab. Took the average of the samples. Thanks Connie! |
| K8CT | MI | EN83ce | Resubmission, Tnx Connie for the test |
| AF9A | IN | EM69wv | The 20M signal had deep fades into the noise. Pretty much a guess on this one. 40M was about 30 db above the noise on peaks with QSB. Thanks, Connie. |
K5CM 40 Meters
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| K3KO | NC | FM06 | 7052907.562 | 7052907.570 | 0.008 | 1.13E-09 |
| K7HIL | AZ | DM42ph | 7052907.562 | 7052907.537 | -0.025 | 3.54E-09 |
| K8CT | MI | EN83ce | 7052907.562 | 7052907.610 | 0.048 | 6.81E-09 |
| AB4RS | VA | FM18hw | 7052907.562 | 7052907.505 | -0.057 | 8.08E-09 |
| K6BZZ | AZ | DM33xb | 7052907.562 | 7052907.423 | -0.139 | 1.97E-08 |
| K5XL | NTX | EM12kp | 7052907.562 | 7052907.762 | 0.200 | 2.84E-08 |
| N2GL | OR | cn85kp | 7052907.562 | 7052907.311 | -0.251 | 3.56E-08 |
| K1GGI | EMA | FN41 | 7052907.562 | 7052907.190 | -0.372 | 5.27E-08 |
| W9ZB | IN | EM69xp | 7052907.562 | 7052907.000 | -0.562 | 7.97E-08 |
| W0HBK | IA | EN42 | 7052907.562 | 7052907.000 | -0.562 | 7.97E-08 |
| K6APW/7 | OR | CN93eq | 7052907.562 | 7052907.000 | -0.562 | 7.97E-08 |
| AF9A | IN | EM69wv | 7052907.562 | 7052906.957 | -0.605 | 8.58E-08 |
| k4dsp | NC | fm05 | 7052907.562 | 7052899.800 | -7.762 | 1.10E-06 |
| WA4FJC | VA | FM07 | 7052907.562 | 7053155.200 | 247.638 | 3.51E-05 |
K5CM 20 Meters
| Call | Section | Grid | TX Frequency | Measured Freq | Error in Hz | Error in PPX |
| K3KO | NC | FM06 | 14121037.247 | 14121037.280 | 0.033 | 2.34E-09 |
| WA4FJC | VA | FM07 | 14121037.247 | 14121037.300 | 0.053 | 3.75E-09 |
| K1GGI | EMA | FN41 | 14121037.247 | 14121037.180 | -0.067 | 4.74E-09 |
| AB4RS | VA | FM18hw | 14121037.247 | 14121037.315 | 0.068 | 4.82E-09 |
| K8CT | MI | EN83ce | 14121037.247 | 14121037.132 | -0.115 | 8.14E-09 |
| K7HIL | AZ | DM42ph | 14121037.247 | 14121037.074 | -0.173 | 1.23E-08 |
| AF9A | IN | EM69wv | 14121037.247 | 14121037.000 | -0.247 | 1.75E-08 |
| K5XL | NTX | EM12kp | 14121037.247 | 14121036.929 | -0.318 | 2.25E-08 |
| K6APW/7 | OR | CN93eq | 14121037.247 | 14121036.500 | -0.747 | 5.29E-08 |
| W0HBK | IA | EN42 | 14121037.247 | 14121038.000 | 0.753 | 5.33E-08 |
| k4dsp | NC | fm05 | 14121037.247 | 14121036.200 | -1.047 | 7.41E-08 |
| K6BZZ | AZ | DM33xb | 14121037.247 | 14120999.090 | -38.157 | 2.70E-06 |
| N2GL | OR | cn85kp | 14121037.247 | 14120728.500 | -308.747 | 2.19E-05 |
TX Frequencies for March 03
7053122.891
14121514.463
| Measured Freq | Error in Hz | Error in PPX | Measured Freq | Error in Hz | Error in PPX | Avg Error | ||||||
| AC0ZG | CO | DN70km | 7053122.913 | 0.022 | 3.12E-09 | 14121514.358 | -0.105 | 7.44E-09 | 6.84E-09 | It's good to get back in practice. I hadn't really looked at this stuff since the last FMT. | ||
| W9ZB | IN | EM69xp | 7053122.876 | -0.015 | 2.13E-09 | 14121515.000 | 0.537 | 3.80E-08 | 2.11E-08 | 14MHz in the noise here again, but took a shot at it. 7MHz strong, but right in with pileup working W1AW/7. | ||
| WB0LXZ | KS | EM27pj | 7053122.738 | -0.153 | 2.17E-08 | 14121514.536 | 0.073 | 5.17E-09 | 2.43E-08 | Thanks. A good challenge for a cold winter's night. It seems like I can forget a lot in a few months time. I used 80m dipole, Tbolt, HP3586B, HP3335A, Spectrum Lab. -bill WB0LXZ | ||
| W7PUA | OR | CN84 | 7053122.800 | -0.091 | 1.29E-08 | 14121514.100 | -0.363 | 2.57E-08 | 2.58E-08 | Good Fun. IC-706MKIIG with N6GN/Shera/GPS 10 MHz control.Spec Lab waterfall. Signals at sundown are challenging, which is what we want. The signal strengths were excellent, which is more than can be said for the spectrum! Thanks much for the run. Bob | ||
| K8CT | MI | EN83ce | 7053123.017 | 0.126 | 1.79E-08 | 14121513.524 | -0.939 | 6.65E-08 | 5.11E-08 | RESUBMISSION: Signals very strong here in Michigan. Tnx Connie for the two nights of tests. de is bob, k8ct | ||
| wa4fjc | VA | FM07 | 7053123.200 | 0.309 | 4.38E-08 | 14121514.700 | 0.237 | 1.68E-08 | 5.22E-08 | Tnx Connie. Only had 4 min warmup time. 73 Gordon | ||
| W9HLY | IN | EN70mt | 7053122.933 | 0.042 | 5.95E-09 | 14121512.614 | -1.849 | 1.31E-07 | 7.14E-08 | Good signals with a bit of CW competition. Used FLEX-1500 and Spectrum Lab. Have a very very limited understanding as to what I am doing. Enjoyed it. Vern | ||
| K5XL | NTX | EM12kp | 7053122.345 | -0.546 | 7.74E-08 | 14121514.410 | -0.053 | 3.75E-09 | 7.93E-08 | 20 M signal had lots of fading, about 700 millihertz of frequency variation. 40 M signal was fairly steady, about 150 millihertz of frequency variation. Used Flex-1500 with GPSDO and Spectrum Lab. Thanks again Connie! | ||
| W7CQ | OR | CN83jx | 14121513.981 | -0.482 | 3.41E-08 | First Time ever: ICOM 756, HP8656B locked to 10Mhz Homebrew GPS Locked Frequency Standard of Brooks Shera design. Used Spectrum Lab on s SignaLink USB sound card. The sound card was calibrated with 1000hz that was generated by dividing the 10mhz Frequency Standard divided down to 1K. Heard nothing on 40 but had a great signal on 20. Jimmy W7CQ | ||||||
| K7HIL | AZ | DM42ph | 7053122.860 | -0.031 | 4.40E-09 | At 0130 UTC we were at the Red Lobster finishing up dinner. A hurried drive got me home at 0207. Sorta got set up and was able to record data for 40m. Between horrid Doppler and a Top Shelf Margarita the results will be fun to see! | ||||||
| KM6QX | EB | CM87 | Oh goodie, , , I found my problem! Not your snowstrom, not propagation, not my equipment, it was just my stupidity. I was listening an hour too late! 8 CST - 2 hours is 6 PST, not 7 PST... Only off by one digit. :( |
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 300 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 - New Sloping dipole. Sloping down from 140'. (favors West, North, East)
40 - Standard Dipole hanging between two 80 foot towers. (favors East, West)
20 - 4el SteppIR at 70'
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 a 3 element tribander .
Note: Because I put the results up quickly, there will be mistakes, so don't hesitate to point them out quickly.
73,
Connie
K5CM