K5CM FMT - December 10, 2008 Results


Transmit frequencies in Hz


    160 Meters - 1846081.460 (9:15 pm CST)

    80 Meters  - 3577085.077 (9:00 pm CST)



     80 Meters - 3568489.476 (9:45 pm CST) 


We are still experiencing very low solar flux values. It seems as thought this bottom is lasting forever. At least it does make for good FMT conditions, on 80 and 160 meters.  Thanks to all that participated and special thanks to the new guys that took part in this FMT.


Stations submitting readings on all possible bands (3):




  A look at all readings 10 millihertz or better:

K5CM OK 3568489.476 3568489.476 0.000 0.00E+00
K6OQK* LAX 3568489.476 3568489.477 0.001 2.80E-10
W3JW VA 3577085.077 3577085.079 0.002 5.59E-10
VE2IQ ON 1846081.460 1846081.459 -0.001 5.42E-10
W3JW VA 1846081.460 1846081.469 0.009 4.88E-09
K1GGI EMA 1846081.460 1846081.47 0.010 5.42E-09

*K6OQK is in ground wave/direct, range of W6OQI




K0MZ KS Thanks for the FMT.  As I use WWV 10MHz as a reference for my counter, the WWV signal was very weak tonight.  After the WC run I noticed that there was another weak signal very near WWV and I may have tuned up my counter to that wrong signal.  So, I made some corrections to my measurement for the WC run.  I may have also had a problem with the 80 meter K5CM run.  For what it is worth, there are the measurements.
K1GGI EMA Decent copy, moderate qsb on all sigs. Lots of spread on W6OQI. Thanks Connie and Marvin.
K2TV NLI Great Fun! I let my IC-756ProII warm up for five hours. In the CW mode I measured the frequency using the IC-756ProII readout and switching between CW and CW-R until the audio tones matched on the counter when switching between the two while adjusting the frequency on the radio.
K5CM OK Hey Marvin…. Was surprised when I had to tune a little for you tonight… good copy here in Oklahoma
K6BZZ AZ Good sigs from Connie; fairly stable; 5-7/8. Using indoor loop on 160 and it works. First attempt. Lots of doppler on W6OQI; +/- .5 Hz. As always, thanks much for running the tests.........
K6HGF LAX Good 80 meter signal from K5CM. 160 meters pretty weak. Thanks for the FMT.
K6OQK LAX Connie's signals were good but with a lot of spread.  Marv's signal had a lot of spread for the first minute and then settled down to a nice straigt line on SL.  Thanks to Connie and Pam, and to Marv for another great FMT. - K6OQK
K7TT WWA I enjoyed this test. Although the signals were weak since have only a trap dipole in attic (no 160M), it was a fun exercise to try and measure the signals. Equipment here is pretty simple, a ICOM IC-737 and homebrew 3.4Ghz Pentium WinXPPro running fldigi as prime measuring tool but also running Spectrum Lab simultaneously (on same computer) which was good to watch at the same time. Used WWV at 2.5Mhz and 5Mhz to calibrate rig (hopefully). If I got close with the very weak signals it will be amazing. Jim
KG0HY NE Signals were a nice -100db. I use my Winradio G313, with Digital Suite Advanced Audio Scope and Spectrum Analyzer.  Antenna is a 100 feet long dipole, up 20 feet. Computer, is 1.8GHz, running Windows 2000.  73, Casey, KG0HY
KT6KT NV FT-847.  RST: 160M;479, 80M;599, WC-80M;599. Thanks.
N3FG EPA First time. 80M good, 160 fair. 706 and Spectran.  Mny tnx. Frank, N3FG
N5DM STX Resubmission with subtraction of 650Hz CW offset frequency from actual dial frequency of TS-480S while receiving unknown frequency in CW mode.
N5LBZ MS Connie's signal was quite weak but mabe we will get within a few Hz
N7EP/7 AZ All signals were fairly strong but noisy into AZ tonight.  My Frequency Standard, WWV, was equally noisy so my measurements are an educated guess.  Thanks Connie.  Your FMT's are great.  Earl, N7EP
N8OB OH Had a birdie on 80M so I knew I was in trouble.  160 M was weak but could copy it.  I can tell I am getting rusty at this. Copied the WC-80M run FB
VE2IQ ON Strong sigs, no QRM
W3JW VA Good signals from both stations tonight. Plenty of doppler on the 80 meter freqs to keep the analysis interesting! TNX fer the FMT!
W6IHG VA Was able to get both 80m and 160m this time. Using "delta reference" method with FT2000 (cw-lsb, agc off, 400hz) and HP3336 with 10mhz GPS reference and GPIB controller to begin automation. Jerry
W6OQI LAX K5CM signal was S9 on 80 meters with minimal doppler shift.  40 meter signal was not as strong, about S5, but with more doppler shift.
W9TJ IL Band conditions and signals good.  Doppler dropped west coast freq slightly during run.  Thank you for the opportunity to participate.     73  Tom
WA1ABI RI Wild Doppler on all freqs tonight. Thanks Connie and Marvin.
WA2USJ NLI First time K5CM FMT
WA3BDV EPA I could not hear the 80m west coast transmission.  I'm just using a Pro3 and switching between CW/CWR listening for a pitch change, then verifying against CHU at 3330.  Lots of fun and a good challenge.  Thanks Connie!
WA4FJC VA Good signal here in VA this time.
wb6zqz EB Warmed up ProIII and Spectrum Lab. Calibrated against WWV and Trimble Thunderbolt at 10mhz. 160m sigs in the noise. Plenty of doppler on all signals, especially eastern. Signal strength varying by 2+ S units.


 K5CM 160 meter readings ( 1846081.460 Hz)


VE2IQ ON 1846081.459 -0.001 5.42E-10
W3JW VA 1846081.469 0.009 4.88E-09
K1GGI EMA 1846081.47 0.010 5.42E-09
W6IHG VA 1846081.473 0.013 7.04E-09
W9TJ IL 1846081.446 -0.014 7.58E-09
WA1ABI RI 1846081.477 0.017 9.21E-09
W1PW AZ 1846081.48 0.020 1.08E-08
WB0LXZ KS 1846081.48 0.020 1.08E-08
N7EP/7 AZ 1846081.437 -0.023 1.25E-08
W0PHD MN 1846081.43 -0.030 1.63E-08
WA4FJC VA 1846081.5 0.040 2.17E-08
K6HGF LAX 1846081.5 0.040 2.17E-08
W6OQI LAX 1846081.42 -0.040 2.17E-08
K6OQK LAX 1846081.415 -0.045 2.44E-08
K6APW EB 1846081.51 0.050 2.71E-08
K6BZZ AZ 1846081.38 -0.080 4.33E-08
N3FG EPA 1846081.24 -0.220 1.19E-07
wb6zqz EB 1846081.21 -0.250 1.35E-07
N8OB OH 1846081.772 0.312 1.69E-07
KT6KT NV 1846081.897 0.437 2.37E-07
WA3BDV EPA 1846081 -0.460 2.49E-07
N5DM STX 1846082.2 0.740 4.01E-07
K7TT WWA 1846079.85 -1.610 8.72E-07
K2TV NLI 1846078 -3.460 1.87E-06
K0MZ KS 1846085 3.540 1.92E-06
KG0HY NE 1846075 -6.460 3.50E-06
WA2USJ NLI 1846701.53 620.070 3.36E-04



 K5CM  80 meter readings ( 3577085.077 Hz)


  Error - Hz        ppx
W3JW VA 3577085.079 0.002 5.59E-10
W9TJ IL 3577085.091 0.014 3.91E-09
N7EP/7 AZ 3577085.097 0.020 5.59E-09
VE2IQ ON 3577085.103 0.026 7.27E-09
W6IHG VA 3577085.108 0.031 8.67E-09
K1GGI EMA 3577085.11 0.033 9.23E-09
W1PW AZ 3577085.11 0.033 9.23E-09
K6OQK LAX 3577085.038 -0.039 1.09E-08
W0PHD MN 3577085.03 -0.047 1.31E-08
WB0LXZ KS 3577085.03 -0.047 1.31E-08
WA1ABI RI 3577085.137 0.060 1.68E-08
N5LBZ MS 3577084.985 -0.092 2.57E-08
N3FG EPA 3577084.96 -0.117 3.27E-08
W6OQI LAX 3577084.935 -0.142 3.97E-08
K6HGF LAX 3577084.928 -0.149 4.17E-08
wb6zqz EB 3577084.92 -0.157 4.39E-08
K6BZZ AZ 3577084.91 -0.167 4.67E-08
WA4FJC VA 3577084.9 -0.177 4.95E-08
K6APW EB 3577085.28 0.203 5.68E-08
KT6KT NV 3577084.831 -0.246 6.88E-08
K7TT WWA 3577085.42 0.343 9.59E-08
K2TV NLI 3577083 -2.077 5.81E-07
N5DM STX 3577087.4 2.323 6.49E-07
K0MZ KS 3577113 27.923 7.81E-06
WA2USJ NLI 3577682.52 597.443 1.67E-04
KG0HY NE 3577686 600.923 1.68E-04





 W6OQI 80 meter readings ( 3568489.476 Hz)


 Error in Hz        ppx
K5CM OK 3568489.476 0.000 0.00E+00
K6OQK* LAX 3568489.477 0.001 2.80E-10
N7EP/7 AZ 3568489.465 -0.011 3.08E-09
W1PW AZ 3568489.434 -0.042 1.18E-08
W3JW VA 3568489.416 -0.060 1.68E-08
K6BZZ AZ 3568489.41 -0.066 1.85E-08
WA1ABI RI 3568489.408 -0.068 1.91E-08
K7TT WWA 3568489.55 0.074 2.07E-08
wb6zqz EB 3568489.4 -0.076 2.13E-08
N8OB OH 3568489.602 0.126 3.53E-08
K6HGF LAX 3568489.33 -0.146 4.09E-08
KT6KT NV 3568489.325 -0.151 4.23E-08
K1GGI EMA 3568489.29 -0.186 5.21E-08
K6APW EB 3568489.71 0.234 6.56E-08
W0PHD MN 3568489.214 -0.262 7.34E-08
W9TJ IL 3568489.202 -0.274 7.68E-08
VE2IQ ON 3568489.143 -0.333 9.33E-08
K0MZ KS 3568489 -0.476 1.33E-07
N5DM STX 3568490.9 1.424 3.99E-07
KG0HY NE 3568497 7.524 2.11E-06
WB0LXZ KS 3568433.97 -55.506 1.56E-05

*K6OQK is in ground wave/direct, range of W6OQI



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



In this classical example above, the saw-toothed shaped waveform is very evident. Sometimes in the early evening the real signal is very near the right rising edge of the saw-tooth. I must say however, I was very lucky to hit the nail on the head with this much Doppler present. Also keep in mind this technique does not always work and a simple average would yield better results.


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

audio/w6oqi shack dec08-snip.wav



Spectrograph of K5CM's 80 meter signal as copied and generated by Burt, K6OQK



In the above spectrograph 15625 is 3577085 Hz. Frequencies to the Left are higher.




Spectrograph of K5CM's 80 meter signal as copied and generated by Jeff, W3JW



In the above spectrograph, 1500 is 3577086 Hz. Jeff uses LSB so frequencies to the Left are higher.


Hear a brief audio snippet of K5CM





Spectrograph of K5CM's 160 meter signal as copied and generated by Jeff, W3JW



In the above spectrograph, 1500 is 1846081 Hz. Jeff uses LSB so frequencies to the Left are higher.




Spectrograph of W6OQI's 80 meter signal as copied and generated by Jeff, W3JW



In the above spectrograph, 1500 is 3568490 Hz. Jeff uses LSB so frequencies to the Left are higher.





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 Dentron 2500 running 400 watts on 160m, 225 watts on 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.


160 - Vertical

 80 -  Cage Dipole (favors East, West, and North)




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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