September 18, 2007 Results

 80M run -9:30 CDT

West coast run - 40 M run 10:00 PM CDT 


K5CM TX Frequency:

80 Meters A -  3555500.0 Hz  

80 Meters B -  3555702.546Hz

Difference -             202.546 Hz


W6OQI TX Frequency:

40 Meters - 70655333.225 Hz 



Sort by best 80 meter difference reading (202.546 Hz)

                                                           AUDIO                      RF


N5PWG TX 202.545 -0.001 4.94E-06 2.81E-10
K6OQK CA 202.545 -0.001 4.94E-06 2.81E-10
WB9FIP WI 202.545 -0.001 4.94E-06 2.81E-10
WA1ABI RI 202.543 -0.003 1.48E-05 8.44E-10
K6YAZ CA 202.54 -0.006 2.96E-05 1.69E-09
VE3OAT ON 202.536 -0.010 4.94E-05 2.81E-09
VE2IQ ON 202.559 0.013 6.42E-05 3.66E-09
W3JW VA 202.498 -0.048 2.37E-04 1.35E-08
W6OQI CA 202.6 0.054 2.67E-04 1.52E-08
W0PHD MN 202.621 0.075 3.70E-04 2.11E-08
W5UFZ AZ 202.665 0.119 5.87E-04 3.35E-08
K8JQ WV 202.749 0.203 1.00E-03 5.71E-08
K6APW CA 202.3 -0.246 1.22E-03 6.92E-08


Sort by best 80 meter "B" reading (3555702.546 Hz)


WB9FIP WI 3555702.54 -0.006 1.69E-09
W6OQI CA 3555702.6 0.054 1.52E-08
K6OQK CA 3555702.64 0.094 2.64E-08
W5UFZ AZ 3555702.674 0.128 3.60E-08
W0PHD MN 3555702.4 -0.146 4.11E-08
W3JW VA 3555702.693 0.147 4.13E-08
WA1ABI RI 3555702.708 0.162 4.56E-08
VE3OAT ON 3555702.812 0.266 7.48E-08
K6APW CA 3555702.9 0.354 9.96E-08
VE2IQ ON 3555702.927 0.381 1.07E-07
N5PWG TX 3555701.52 -1.026 2.89E-07
K8JQ WV 3555664.88 -37.666 1.06E-05



W6OQI TX Frequency:

40 Meters - 70655333.225 Hz 

Sort by best West Coast 40 meter reading

K6OQK CA 7065333.225 0.000 0.00E+00*
K6YAZ CA 7065333.221 -0.004 5.66E-10  
WA1ABI RI 7065333.207 -0.018 2.55E-09  
VE3OAT ON 7065333.288 0.063 8.92E-09  
K5CM OK 7065333.156 -0.069 9.77E-09  
K6APW CA 7065333.3 0.075 1.06E-08  
N5PWG TX 7065333.3 0.075 1.06E-08  
K8JQ WV 7065333.3 0.075 1.06E-08  
W3JW VA 7065333.144 -0.081 1.15E-08  
W5UFZ AZ 7065333.049 -0.176 2.49E-08  
VE2IQ ON 7065333.413 0.188 2.66E-08  
WB9FIP WI 7065333.515 0.290 4.10E-08  
W0PHD MN 7065329.473 -3.752 5.31E-07  

*Burt is in ground wave range of Marvin





K5CM OK Good signal,  I did see a pattern in the spectrum that helped my reading this week.
K6APW CA signals a few dB over noise with QSB
K6OQK CA Connie, Tonight your 80-Meter signal took some fades right down into the noise and at times was gone for 3 or 4 seconds.  The deep fades added to the unexpected" that makes each FMT something new.  Marv's signal was unusually stable this evening.  I suppose that's the tradeoff for the differences in distance tonight.  Thanks to you and Marv for another great FMT.  A very interesting FMT indeed."
K6YAZ CA Very weak signals on 80 meters, but was able to get nice 200 Hz tone for SL; 202.54 Hz. Unable to measure individual carriers.
N5PWG TX Good signals, but I think Doppler correction was variable and, at times, large.I usually get my WWV calibration at about 1:00 PM CDT,but Doppler appeared too great at that time
VE2IQ ON I couldn't use AM mode last night - just too much nearby QRM, so I did it with 500-Hz narrow CW filter. We are starting to notice some difference between the two tones - for instance: while listening to it sometimes the higher frequency would dominate, sometimes not.  It was difficult to count the beat notes - lots of short-term jitter; often difficult to make the call.  Also lots of QSB.  My submission is just an educated guess this time.  I don't think I averaged long enough to take out the short-term uncertainties. The west coast 40 M run looked much more stable than your 80 M B" signal - but I expect the ionosphere will take its toll on both so I'll hold my excuses until you post the results! Thanks for the fun
W0PHD MN A lot of QRN and WC was weaker than usual; in noise a lot of the time. The frequency and time selection for this time of the year seems to be about right. It is evident that a lot of thought goes into these tests   THANKS!
W3JW VA Conditions were average to above average with moderate QRN . Doppler effects were moderate but quite noticeable (both on the test signals and WWV). The the two frequency AM mode" waterfall display had as much "doppler spread" as the baseline RF signals had."
W5UFZ AZ tnx fer running tests, low qrn, sigs 5-6-9
WA1ABI RI Very difficult condx tonight. QRM on 80; QRN and lots of Doppler on both 80 and 40.
WB9FIP WI Good signals from both Oklahoma and California tonight.  Low Doppler on 80 meters, while the Doppler on Marvin's 40 meter signal continues to baffle me. Thanks to Marvin and Connie for the tests.






Capture of Marvin's 40 meter signal by K5CM. (use the magnify button if you can't read the screen)

Play the ending sequence of Marvin's 40 meter run. 

I merged a couple of captures by W3JW, Jeff together. You can easily see the Doppler spreading the 200 Hz run, but the 100 Hz still looks clean. 

The jury is still out on whether the 200 Hz difference is starting to show signs of Doppler spread. No one hit the FMT "nail on the head" this week, but several were still very close. QRM and QRN may have had some impact on the readings this week (see VE2IQ's comments above and the merged captures above).  We will continue the 200 Hz span for at least another run.

It was interesting to note that more than half of the participants copied Marvin's 40 meter run to better than .1 Hz. Even though  Burt usually reads Marvin's frequency to better than .1 Hz, this is the first time, he read Marvin's frequency with zero error. Burt is in ground wave range of Marvin. (see Burt's comments above)


Stations copying K5CM 80 meter difference run to .01Hz or better




Stations copying K5CM 80 meter B frequency run to .1Hz or better




Stations copying W6OQI "West coast run" to .1Hz or better.


*(Zero error)






Transmitting equipment used by K5CM for this FMT:

A HP-Z3801 GPS clocks a HP-3336B and a PTS-250. A small 10 db transistor amp follows and drives a 12BY7 / pair 6146. Then to the final amplifier, a Drake L4B at 300 watts output except on 30 and 17 meters where the power is 75 watts. There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the HP-Z3801.  As a reality check,  I periodically log the HP-Z3801 against WWVB.  


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

40 - Dipole (favors East, West)

30 - Dipole



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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