September 26, 2007 Results

80M run 9:30PM CDT

40M run 9:00PM CDT

30M run 8:30PM CDT

20M run 6:00PM CDT

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


K5CM TX Frequency:

80 Meters A -  3555932.1 Hz  

80 Meters B -  3556133.343 Hz

Difference -             201.243 Hz

40 Meters - 7055146.238 Hz

30 Meters - 10115874.673 Hz

20 Meters - 14055377.837 Hz


W6OQI TX Frequency:

40 Meters - 7065128.855 Hz 



Sort by best 80 meter difference reading (201.243 Hz)

                                        AUDIO                      RF


N5PWG TX 201.243 0.000 0.00E+00 0.00E+00
VE2IQ ON 201.243 0.000 0.00E+00 0.00E+00
WB9FIP WI 201.243 0.000 0.00E+00 0.00E+00
W6OQI CA 201.242 -0.001 4.97E-06 2.81E-10
WA1ABI RI 201.241 -0.002 9.94E-06 5.62E-10
K6OQK CA 201.241 -0.002 9.94E-06 5.62E-10
VE2AZX QC 201.239 -0.004 1.99E-05 1.12E-09
W3JW VA 201.250 0.007 3.48E-05 1.97E-09
W1PW AZ 201.233 -0.010 4.97E-05 2.81E-09
VE3OAT ON 201.257 0.014 6.96E-05 3.94E-09
W5UFZ AZ 201.211 -0.032 1.59E-04 9.00E-09
K6APW CA 201.200 -0.043 2.14E-04 1.21E-08
K8JQ WV 201.300 0.057 2.83E-04 1.60E-08
NF8M MI 201.330 0.087 4.32E-04 2.45E-08
WB0LXZ KS 200.910 -0.333 1.66E-03 9.36E-08
KC0VSJ MO 205.438 4.195 2.04E-02 1.18E-06



Sort by best 80 meter "B" reading (3556133.343 Hz)


VE3OAT ON 3556133.346 0.003 8.44E-10
WB9FIP WI 3556133.339 -0.004 1.12E-09
VE2IQ ON 3556133.352 0.009 2.53E-09
WB0LXZ KS 3556133.363 0.020 5.62E-09
WA1ABI RI 3556133.323 -0.020 5.62E-09
W3JW VA 3556133.267 -0.076 2.14E-08
W6OQI CA 3556133.242 -0.101 2.84E-08
K6OQK CA 3556133.241 -0.102 2.87E-08
VE2AZX QC 3556133.237 -0.106 2.98E-08
K8JQ WV 3556133.220 -0.123 3.46E-08
KC0VSJ MO 3556133.470 0.127 3.57E-08
W1PW AZ 3556132.836 -0.507 1.43E-07
K6APW CA 3556133.900 0.557 1.57E-07
W5UFZ AZ 3556132.693 -0.650 1.83E-07
N5PWG TX 3556130.580 -2.763 7.77E-07


Sort by best 40 meter reading (7055146.238 Hz)


VE3OAT ON 7055146.245 0.007 9.92E-10
WB9FIP WI 7055146.249 0.011 1.56E-09
K6OQK CA 7055146.250 0.012 1.70E-09
KC0VSJ MO 7055146.261 0.023 3.26E-09
VE2IQ ON 7055146.181 -0.057 8.08E-09
W1PW AZ 7055146.177 -0.061 8.65E-09
VE2AZX QC 7055146.171 -0.067 9.50E-09
W3JW VA 7055146.117 -0.121 1.72E-08
WA1ABI RI 7055146.099 -0.139 1.97E-08
W5UFZ AZ 7055146.055 -0.183 2.59E-08
K6APW CA 7055146.500 0.262 3.71E-08
N8OB OH 7055145.650 -0.588 8.33E-08
N5PWG TX 7055145.560 -0.678 9.61E-08


Sort by best 30 meter reading ( 10115874.673Hz)


W5UFZ AZ 10115874.710 0.037 3.66E-09
K6OQK CA 10115874.568 -0.105 1.04E-08
WB9FIP WI 10115874.798 0.125 1.24E-08
W1PW AZ 10115874.838 0.165 1.63E-08
K6APW CA 10115874.100 -0.573 5.66E-08
W3JW VA 10115873.962 -0.711 7.03E-08


Sort by best 20 meter reading ( 14055377.837Hz)


WB9FIP WI 14055377.895 0.058 4.13E-09
W1PW AZ 14055377.725 -0.112 7.97E-09
W5UFZ AZ 14055377.981 0.144 1.02E-08
VE3OAT ON 14055377.684 -0.153 1.09E-08
W3JW VA 14055377.677 -0.160 1.14E-08
WA1ABI RI 14055377.665 -0.172 1.22E-08
VE2AZX QC 14055377.658 -0.179 1.27E-08
WB0LXZ KS 14055377.636 -0.201 1.43E-08
VE2IQ ON 14055377.632 -0.205 1.46E-08
K6APW CA 14055377.600 -0.237 1.69E-08
N5PWG TX 14055378.290 0.453 3.22E-08



W6OQI TX Frequency:

40 Meters -  7065128.855Hz 

Sort by best West Coast 40 meter reading

K6OQK CA 7065128.854 -0.001 1.42E-10 *
KC0VSJ MO 7065128.914 0.059 8.35E-09
K6APW CA 7065129.000 0.145 2.05E-08
WA1ABI RI 7065128.709 -0.146 2.07E-08
WB9FIP WI 7065128.706 -0.149 2.11E-08
W3JW VA 7065128.674 -0.181 2.56E-08
K5CM OK 7065128.668 -0.187 2.65E-08
VE3OAT ON 7065128.625 -0.230 3.26E-08
W5UFZ AZ 7065128.600 -0.255 3.61E-08
N5PWG TX 7065129.300 0.445 6.30E-08

*Burt is in ground wave range of Marvin





NF8M MI My first entry. I just stumbled across your 80m signal last night, so looked you up on the web, and used fldigi to get the tone frequencies. It was fun! I look forward to catching these more often in the future. 73 Frank
W6OQI CA  "Earlier experimenting today with my own test signals showed using my Icom 756 PRO III transceiver in AM mode to be the best way to measure the frequency differential using Spectrum Lab."
W1PW AZ No signal heard from WC on or near 7065.  Nothing... Nada...
N8OB OH Signals were non-readable or very weak.
VE2AZX QC Very strong Sig on 20m,No sig on 30m,Strong on 40m, Moderate on 80m, Tnx for FMT
VE2IQ ON Good copy both 20M runs with constant amplitude but freq increasing over East, decreasing over West so I averaged them.
W5UFZ AZ K5CM sigs 599 W6OQI 549
VE3OAT ON Beautiful signals on 20 m (little QSB and no Doppler spreading) but my receiver wasn't warmed up yet.  Shame on me!  No propagation for the 30 m run.   The other runs were as challenging and fun as ever.  Thanks to Connie and Marvin.
K5CM OK Signal was weak and willowy for most of the run, but that's what makes it interesting. Thanks for doing the west coast run" and giving me a chance to measure also"
W3JW VA Signals were all stronger than normal, except for 30 meters which was barely readable. Doppler spread was much less noticeable, compared to recent tests, except for the 80 meter signal where it was pronounced on both the AM mode" and "standard" portions of that test period."
WB9FIP WI Tough going tonight on most bands, especially 20 and 30 meters.  80 meters S9.  Keeping my fingers crossed on Marvin's signal. Thanks to all for the tests.
WA1ABI RI Great copy on 20,nil on 30,good on 40 and 80,tough copy on WC 40m. Thanks Connie and Marvin.
K6OQK CA Connie, Sorry I missed the 20-Meter Run.  Signals we're good on 80, 40 and 30 Meters with some Doppler.  For your signals I use my long Inverted-V.  For Marv I use my short-longwire, which has minimum skywave on Marv's signal.  Once again, thanks for a great FMT and all your work on our behalf.
KC0VSJ MO Some of the worst propagation in weeks. Really had to dig in the mud to recover signals from Oklahoma, though W6OQI was pretty strong. Also looks like I need to work on sound card calibration some more
K6APW CA 20  over 15dB difference 20M east/west - WC in noise"
N5PWG TX 20 M very weak with QRM. 30 M: no sig heard. 40 M:Fair signal. 80 M:B" signal looked erratic. WC: Good signal with QRN. Thanks for the fun wish I had a frequency standard.
WB0LXZ KS Thanks, I sure need the practice! Bill





It is good to have Burt's ground wave reading of Marvin's signal. It adds another independent level of validation to Marvin's transmitted frequency. It would be great to find a station in ground wave of my signal, but no luck finding anyone in the local area. 

Because I have no independent verification I usually do two things:

1 - I log/monitor WWVB for at least 1 hour in the daytime, on the day of the FMT. I use my HP-3586 with the same GPS standard for this test. For this FMT, the results were 60000.000002 (3.88E-11) over a one hour average. This does not mean my GPS is off by this amount, it just shows two independent methods differ by that amount over a 1 hour average. However, assuming the worst case and give all the error to my GPS, this would translate into about a 500 micro Hertz error on 20 meters. The closest 20 meter reading was Brad,WB9FIP at 56,000 micro Hertz high. 

2 - During the FMT I monitor the test with a separate receiver/computer not connected to my GPS. I use this system to look for any short term drift. 

Although I can monitor absolute short term frequency of the transmitter with a counter capable of reading to 1 mHz in about 10 or 15 seconds, it uses as it's time base the same GPS source as the 3336B which drives the transmitter. 


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


*(Zero error)




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




Stations copying K5CM 40 meter run to .1Hz or better




Stations copying K5CM 30 meter run to .1Hz or better




Stations copying K5CM 20 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 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

20 - 4 Element SteppIR Yagi


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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