August 15, 2007 RESULTS
(40M run - 9:00 PM CDT 80M run -9:30 CDT)
(West coast run - 10:00 PM CDT )
K5CM TX FREQUENCY :
80 Meters A - 3555710.1 Hz (Published Reference)
80 Meters B - 3555761.118 Hz
40 Meters - 7055817.954 Hz
W6OQI TX FREQUENCY:
40 Meters - 7065588.125 Hz
Sort by best 80 meter "Corrected" reading (B - 3555761.118 Hz)
Sort by best 80 meter "Uncorrected" reading (B - 3555761.118 Hz)
Sort by best 40 meter reading ( 7055817.954 Hz)
Sort by best West Coast 40 meter reading ( 7065588.125 Hz )
|K5CM||OK||Good signal tonight Marvin. Thanks for doing the WC run.|
|K6APW||CA||The 80M a few dB over S6 noise both 40M nice S7 to S9+ though WC had a few very deep dips.|
|K6OQK||CA||There was quite a bit of Doppler on all signals including Marv's. Your 40-meter signal was quite good but 80-Meters was weaker than normal. Tonight was one of chaos in my shack. Thanks to you and Pam for great FMT's.|
|K6YAZ||CA||Poor conditions and problems with getting SL to start caused no readings on Connie; 40 meters quite spread out by Doppler. Used marker on W6OQI and measured offset using delta frequency function. Good signal from him; but he isn't very far from me.|
|KM1P||MA||Went for 40M only this time - just like last night; but I found that I got better results trying to measure on the correct evening! Signal was fine; but a central peak in the FFT was tough to discern.|
|N5PWG||TX||Thanks again for all that you are doing. I really enjoy the activity. All signals good tonight.|
|N8OB||OH||I got home at the last minute so equipment was not warmed up. This is a very interesting way to measure.|
|VE2AZX||QC||Very strong on 40meters about 58 on 80meters. I recorded the dual tones; played them back and measured them separately with my counter and automated set-up. A 3 Hz filter is used to separate the tones. Thanks for running these tests. Jacques VE2AZX|
|VE3OAT||ON||I briefly tried to measure the B-A beat note in AM mode but the poor low frequency response of my receiver seemed to prevent it. I will play with that some more. The straight RF method always works though. Doppler shift was pretty stable around 250 Hz. W6OQI's signal was weaker in the se this time but I think I got a fair average reading. Thanks again for a "fun run".|
|W1PW||AZ||No measurements yet on 2-tone. Trying to figure a way by using "dual receive" function in the 756-ProII.|
|W3CSW||MD||Thanks again Connie Good signals but bad Doppler.|
|W3JW||VA||Signal strength conditions were average to above average and QRN was less than in most recent tests. Doppler effects (as observed on the SL waterfall display) were significant but not as severe as during tests in the July time frame. Most results were obtained with SL.|
|W6OQI||CA||Connie; I was able to get Spectrum Lab running OK in the late afternoon. I set the span for 60 Hz starting at the HP3586B I.F. and extending 60 Hz below. During the 80 meter FMT I recorded the .wav file and analyzed it later using the SL Delta function to come up with a difference of -50.888 Hz. Due to the conversion scheme of the HP3586B I had to add this to your A frequency to determine your B frequency.|
See Burt's capture of the beat note of frequency A and B (Aug 15th run)
Listen to a short audio clip from VE2IQ audio/ABFAUG01-s.WAV
Listen to a short audio clip from KM1P audio/02AUG_K5CM_FMT_RX_KM1P_80M-s.wav
Listen to a short audio clip from K5CM of w6oqi audio/w6oqi-july11-s.wav
Bill, W3CSW hit the nail on the head with his uncorrected reading. Burt (K6OQK), Jacques (VE2AZX), and Jeff (W3JW) turned in very close "corrected" readings.
Stations copying K5CM run to .1Hz or better uncorrected.
W3CSW, W3JW, W5UFZ, K8JQ, WB0LXZ
Stations copying K5CM run to .1Hz or better corrected.
K6OQK, VE2AZX, W3JW, W3CSW, W5UFZ, N5PWG
Stations copying K5CM 40 meter run to .1Hz or better.
Stations copying W6OQI "West coast run" to .1Hz or better.
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 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 (favors East, North, West)
20, 17 - 4 element SteppIR in Bi Direction Mode (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.
Thanks to all that participated.
back to main page