K5CM FMT - March 05, 2009 Results


Transmit frequencies in Hz


    80 Meters - 3578029.264 (9:30 pm CST)

    40 Meters  - 7078480.678 (9:15 pm CST)



     80 Meters - 3567556.556 (10:15 pm CST)

     40 Meters - 7067009.126 (10:30 pm CST)

Overall readings were down this FMT for various reason but it was interesting to note that the 10 millihertz or better readings were much lower. Part of this might be the omission of 160 meters this time. 


The FMT results look like a teeter totter, with the balance over Oklahoma for my run. The West side was moving up and the East side was moving down. By the time Marvin Transmitted everything (ionosphere) was moving down.

Stations submitting readings on all possible bands (4):



  A look at all readings 10 millihertz or better:


N3FG EPA 7078480.68 0.002 2.83E-10
N5LBZ MS 7078480.675 -0.003 4.24E-10





N8OB OH Lots of QRM and QRN this evening.  Still fun to do.
W9ZB IN Connie, first time for me.  All signals had QSB, but all were readable at my shack. Fun! 73, Dick
W6OQI LAX Good signals from K5CM on 40 and 80 meters.  S6 on 40 and S9+10 on 80 meters here in Southern California.
K6BZZ AZ Thanks for the tests. No copy west coast 40 meter sig.
WA1ABI RI Very good signals tonight, no QRN. Connie's rebuilt antennas are working FB. Thanks Connie and Marvin.
N5LBZ MS Very good signals on both bands.
N3FG EPA Thanks again.  I certainly enjoy these events.
KD2BD NNJ Thanks for your outstanding dedication in working to get your antennas back in the air after the ice storm!  Very strong signals were received from Connie on 80, while Marvin flirted with the noise level.  Despite having a K-index around zero, signals from both Connie and Marvin experienced noticeable multipath fading (quick, deep fades with a 180 degree reversal in carrier phase coming out of the fade) that undoubtedly affected frequency measurement accuracy.
W9TJ IL Poor day in Flatrock!  Both 40 mtr sigs very poor, S2 max and fading clear out.  The 80 mtr sigs were good S9+20 but both very phase unstable.  WC 80 had 0.2 hz difference between start of interval and stop while Connie was up and back down  with lots of phase wander in between.  It was wild and part of the readings are just WAG.  73 and thanks again for a chance to participate.   Tom 
W1PW AZ On 80M, K5CM was 579; W6OQI was 559 with Doppler.  On 40M, I could not hear either K5CM or W6OQI at all, but SL "saw" a signal (at the right time) that might have been K5CM even though I couldn't hear it.  I've posted the calculated 40M result based on what SL 'saw', which might have been (or might not have been) K5CM. Nothing ventured; nothing gained.  Thanks Connie and Marvin for running these tests!
W3JW VA Signal strengths from both stations were better than normal. The doppler effects (particularly on 80 meters) were quite evident, but not at the extreme they can approach. Glad you were able to get your antennas back up and operational. Tnx fer the FMT---   Jeff
K5CM OK Marvin, your 80 meter signal was very good. The 40 meter signal was near the noise at times. Thanks for doing the West coast run.
KE2N VA other info by email
K1GGI EMA Signals from K5CM were good, but 80 was all over the place, several tenths. W6OQI on 80 had deep qsb into the noise, but plenty of signal to work with. Thanks guys.



 K5CM 80 meter readings (3578029.264 Hz)


Error in Hz
N8OB OH 3578029.327 0.063 1.76E-08
W6OQI LAX 3578029.17 -0.094 2.63E-08
W1PW AZ 3578029.165 -0.099 2.77E-08
N3FG EPA 3578029.37 0.106 2.96E-08
KE2N VA 3578029.378 0.114 3.19E-08
WA1ABI RI 3578029.379 0.115 3.21E-08
K6BZZ AZ 3578029.068 -0.196 5.48E-08
AF9A IN 3578029.483 0.219 6.12E-08
K1GGI EMA 3578029.5 0.236 6.60E-08
KD2BD NNJ 3578029.525 0.261 7.29E-08
W9TJ IL 3578029.54 0.276 7.71E-08
W3JW VA 3578029.566 0.302 8.44E-08
W9ZB IN 3578029.7 0.436 1.22E-07
N5LBZ MS 3578029.7 0.436 1.22E-07
WA2USJ NLI 3578315.025 285.761 7.99E-05


 K5CM  40 meter readings (7078480.678Hz)


Error in Hz
N3FG EPA 7078480.68 0.002 2.83E-10
N5LBZ MS 7078480.675 -0.003 4.24E-10
K1GGI EMA 7078480.742 0.064 9.04E-09
WA1ABI RI 7078480.757 0.079 1.12E-08
K6BZZ AZ 7078480.781 0.103 1.46E-08
W3JW VA 7078480.784 0.106 1.50E-08
W6OQI LAX 7078480.56 -0.118 1.67E-08
KE2N VA 7078480.822 0.144 2.03E-08
W9TJ IL 7078480.915 0.237 3.35E-08
W9ZB IN 7078481 0.322 4.55E-08
WA2USJ NLI 7078482.5 1.822 2.57E-07
N8OB OH 7078478.485 -2.193 3.10E-07
W1PW AZ 7077990.723 -489.955 6.92E-05




 W6OQI 80 meter readings (3567556.556Hz)


Error in Hz
K5CM OK 3567556.621 0.065 1.82E-08
WA1ABI RI 3567556.635 0.079 2.21E-08
K1GGI EMA 3567556.66 0.104 2.92E-08
K6BZZ AZ 3567556.675 0.119 3.34E-08
W1PW AZ 3567556.678 0.122 3.42E-08
W3JW VA 3567556.689 0.133 3.73E-08
W9TJ IL 3567556.71 0.154 4.32E-08
W9ZB IN 3567556.74 0.184 5.16E-08
KD2BD NNJ 3567557.025 0.469 1.31E-07




 W6OQI 40 meter readings (7067009.126Hz)


Error in Hz
K1GGI EMA 7067009.14 0.014 1.98E-09
K5CM OK 7067009.155 0.029 4.10E-09
W9TJ IL 7067009.17 0.044 6.23E-09
WA1ABI RI 7067009.074 -0.052 7.36E-09
W9ZB IN 7067009.285 0.159 2.25E-08
W3JW VA 7067008.965 -0.161 2.28E-08





Spectrograph of Marvin's 80 meter signal as copied by K5CM



Hear a brief audio snippet of Marvin's 80 Meter signal as copied by K5CM.



Spectrograph of Marvin's 40 meter signal as copied by K5CM








Spectrograph of K5CM's 80 meter signal as copied and generated by Ken, KE2N

(note that the time scale is not correct in real clock time)








Spectrograph of K5CM's 80 meter signal as copied by John, WA1ABI







Transmitting equipment used by K5CM for this FMT:

A Trimble Thunderbolt 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 Tokyo Hy-Power amp running 500 watts on 40m, and 80m.  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 WWVB.  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.


 80 -  Dipole - Four wire, with a 3.5 foot Cage, sloping down from South to North (favors East, West, and North)

 40 - Standard Dipole (favors East, West)




Current W6OQI FMT transmitting equipment:


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. 






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