K5CM FMT - Feb 15, 2010 Results
|K5CM - 1||K5CM -2||W6OQI -WC|
We again had very good participation with entries from three continents. From the comments, as well as my own observations, of Marvin's signal strength, conditions were some of the best I have seen recently. However, Mr. Doppler did not take a vacation.
As always, thanks to all that participated.
Stations submitting readings on all possible bands(8) - ranked by average error:
A look at all readings 10 millihertz or better:
*May be in ground wave/direct range of W6OQI
|N8OB||OH||I had a difficult time on 40M but sigs were good. 80 seemed much better. Fun as usual.|
|K6YAZ||LAX||First FMT for me in a while. Used RF Space SDRIQ receiver, with HP 3336B as a marker. Rest of FMT too late for me. Stuart|
|W4JLE||SC||First shot at trying this FMT. Enjoyed it thanks!|
|G3SVW||DX||K5CM heard on 40m (S4) & 80m (S3). The 40m signal went off before I could get an accurate zerobeat - I struggled with turbulent propagation caused by the solar flares over the weekend. A bit quicker on 80m, I got a (doubtful) reading, again troubled by propagation. W6OQI nil hrd. 73,Ron,G3SVW|
|N5DM||STX||TS-480SAT & DigiPan v2.0|
|W6OQI||LAX||K5CM signals were good on all bands here in Southern California. However, the usual Doppler made it necessary to use the dart board to decide which numbers to go with.|
|W0PHD||MN||noted mark difference in doppler on your different beam headings on 20 mtr sigs NE most stable for me.|
|G3SVW||DX||Connie, your 13:15 - 13:21 UTC run (16th February, 2010) on 20m was S7 in Manchester. A good signal but very slow rolling QSB. Not deep, but puzzling when trying to guage the exact spot of a zero-beat against my HP 3336A. Thanks for the run. I'm off to work now, a late start for me HI!|
|W4NUS||NC||16 Feb. 2010 FMT 80M 7:45 AM EST Signal S4 noise and some QRM. 40M 8AM Signal S9 noise free, minimal QRM. 20M 8:15 Signal S1 at best with QSB into noise. Had only about one min. of weak sig no measure.SDR-14 receiver in DSB mode calibrated against 10MHZ. signal from WWV. No sig from WWV on 15 or 20MHZ. this AM. Many tnx for doing the tests for us. I will contnue to participate and make improvements. 73 de Guy W4NUS email@example.com|
|N5LBZ||MS||The first run Monday evening 20&40 were very weak 80M had a good signal. On the second run Tue Morning 80M good signal 40M was ok but 20M very weak with a strong carrier close by not sure I measured the right one.|
|KØMZ||KS||Thanks Connie and Marvin for another FMT. I missed the first 3 tests due to a Civic meeting that evening. Marvin's 40 M signal was S-7 with QRN. Didn't have the HP10544A quite warmed up for this run. 80M signal was 20 over with QSB. K5CM morning 80 M was 40 over. 40M sig was S-7 with doppler. First 20M signal was less than S-1 and second 20M signal was at noise. I averaged both measurements for my final. As usual, all measurements were strictly by ear with 30+ year old equipment.|
|N7EP||AZ||Using Spec. Lab, IC-706MKIIg and WWV. All runs were above S9 in AZ except the last 20 M run which wasn't there until half way through the run. The sunspots made the signals stronger but all were almost one hz wide which made the measurement an educated guess. This is the first FMT in a long time that I received all runs. Thanks for the FMT Connie. Earl in Mesa, AZ|
|KB3MUN||WPA||I was not able to make appointment for first 20m runs; there was too much local QRM for morning 80m run.2m 1.4 wavelength magount in basement .. TS140S .. FLdigi v3.13AE I curious to see is I'm getting better at this.|
|K6BZZ||AZ||Thanks Connie and Marvin. Always fun and challenging. Good signals. I missed Tuesday morning 80 meter run due to operator error, hi. Using Thunderbolt GPSDO, HP-3336B, FT-817, Spectrum Lab, laptop, and excel. Attic antennas.|
|WA1ABI||RI||Good signals on all runs. Tnx Connie and Marvin.|
|W4UK||SC||Missed start of 10 PM EST run due to Olympics on TV, but got last part. Thanks for putting these FMTs on for us, Connie. Jerry W4UK|
|W9ZB||IN||80M sigs were best, others weaker with unstable phase. Got readings for all, but my new correction technique may have been a big mistake. Equipment is a home brew copy of SDR1000 with 100MHz ovenized reference, but sound card clock error is not correctable, so various calculations for final results introduce more error than I want.|
|K5BTK||MS||The bands seemed noisier than usual here during the test - especially the early 20m run. It had gotten much quieter by the evening runs. The "last-minute" reminder of the FMT is really helpful. Thanks...|
|K6HGF||LAX||Severe doppler on Connie's 80 meter signal, but all signals strong.|
|KD2BD||NNJ||Great signals from Connie and Marvin during the evening 80 meter run! However, my receiver lost phase lock on Marvin's signal during a deep fade and/or static crash near the end of my first 100 second frequency measurement period. I re-established lock and reset my counter, but the keydown period ended just a few seconds before my second attempted measurement was complete, so I got nothing. :-(|
|K6OQK||LAX||All of the signals were good at my location in Glendale, CA with the exception of the Thursday morning 20-Meter signal, which was non-existent. Again, Thanks to Pam and Herta for the loan of their mates to put on another great FMT. Burt, K6OQK|
|WA4FJC||VA||Trimble GPS DO & HP 3586B. Good signals except for the West Coast 80 M run that had extreme doppler and fading. I will now have to investigate (again) the use of a sound card program. Thanks Connie and Marcin.|
|N3FG||EPA||Thanks again. It was fun. I used the wrong mode on 80M, but I tried to correct it. We'll see what happens. Hi. Good signals here on all bands.|
|W1PW||AZ||Sigs were good except 40M Run 2 and 20M Run 2, which was weak, but MUCH weaker when beaming West, so I may have been hearing Long Path(?!) WC 40 was inaudible, but SL 'saw' something, so I put in the numbers that SL provided. WC80 was strong, but lots of Doppler here in AZ. Thanks again, Connie and Marvin, for these opportunities, and for the fun!|
|K6APW/7||OR||Broken one-Hertz switch on generator during calibration check after the 20 meter run -- I hope anything is close! All signals were strong for a change.|
|AF9A||IN||Conditions on 20 and 40 were really poor Monday night. Good signal on 80 with little QSB. Thanks for the test! 73 de AF9A|
|N5JOA||NFL||Used RF Space SDR-IQ and IBM T-20 Thinkpad running SpetraVue ver 3.04. Let radio and computer warm up for 2 hours and then calibrated to WWV on 10 MHz. Antenna was G5RV dipole at 30 feet. Good signals received here in Tallahassee, FL. -70.9 dB on 80M and -77.7 on 40M. 73!|
|VE3OAT||ON||Haven't done this for a while and had almost forgotten how much fun it is! Glad to be back and hope I got it right. My equipment is a little different but the technique is the same, except for the rust HI.|
|7L4IOU||DX||The first 20M (8AM loca time) was loud and clear. both 80M (21:45) and 40M (22:00) CW was clear and easy to copy. The last 20M (22:15) was delicate. I report frequency of faintly trace but not sure. In addition, K6UO WSPR 20M BEACON, was copied until this morning from last night.Propagation between North America and JA is looking seems good and stable in all bands. Thank you very much!|
|W7KXB||AZ||My first Fq measuring gig. Not sure if I'm doing it right but it was fun trying.|
|KA1BQP||RI||Very strong signals on both WC and EC runs. Tnx connie and Marvin.|
|N2CUA||WNY||OK .. back at it again .. its been awhile .. new radio .. FT897D and some tweeking and program of buttons and file export functions of Spectrum Lab. Hopefully I got a little closer this time with the rig , SL, and WWV. Connie, thanks again for all you patience and mentoring. 73 all, Randy - N2CUA|
|K1GGI||EMA||Good copy on all freqs, all aimings. Had a pretty sharp spectral line that wandered a few tenths during the first 20m run. Thanks guys.|
|W3JW||VA||Best signal strengths on all runs I have heard in recent memory. Plenty of doppler and multipath to make things intersting. I also noticed the relationship between your beam heading (20 M) and received frequency. Most noticeable on the Monday nite run (peak-to-peak variation of 0.4 Hz just due to beam heading) but also seen on the Tuesday AM run (0.3 Hz peak-to-peak). Tnx fer the FB FMT.|
|W9TJ||IL||PM 20 signals very poor, freq picked off of CW. 40 sigs poor QRN peak S6. 80 sigs 9+20. WC 40 QRN S9 peak 9+20 sigs S5P7 with fadug. WC 80 sigs good peak S9+20 with some QRM. Monday 80 sigs S9+40 wow! 40 QRN S4P9 sigs S4P7. 20 sigs S3P5 Dr. Doppler must have been mad at me. First trial with Analyzer. Thank you for opportunity to participate.|
|WA2USJ||NLI||I keep on trying|
|WBØLXZ||KS||After the 8th transmission, I realized I was using 11025 instead of 44100 rate. Too late. 20M signals faded clear out before I was really finished tuning it in. Still FUN! and maybe I can do better next time. HP3586B, HP3335A, Home Brew GPS-controlled OCXO using QBASIC and Spectrum Lab. Thanks.- bill|
|K9KK||OK||HP3801a disciplining HP3336B with Spectrum Lab. Signals from BOTH K5CM and W6OQI good on all runs into central Oklahoma. Doppler shift demons were present AS USUAL.|
K5CM 80 Meter first run - 03:00 UTC
K5CM 40 Meter first run - 03:15 UTC
K5CM 20 Meter first run - 23:00 UTC
W6OQI WC80 Meter run - 4:00 UTC
W6OQI WC40 Meter run - 4:20 UTC
K5CM 80 Meter second run - 12:45 UTC
K5CM 40 Meter second run - 13:00 UTC
K5CM 20 Meter second run - 13:15 UTC
K5CM's 80, 40, and 20 meter signals as copied by WA1ABI, John
Notice the frequency difference in the South East run and the North East run.
At least in this example the direct beam heading (NE) was best for John.
W6OQI's 80 and 40 meter signals as copied by WA1ABI, John
K5CM'S 20 meter morning run
audio/k5cm 20MornCallup_East-by abi.wav
Notice the QSB riding on the audio waveform. G3SVW, also commented on this QSB.
This from Earl, N7EP:
Earl's guess was very close this time.... only 5 millihertz off!!! Good going Earl.
W6OQI's 80 and 40 m signal as received by K5CM
audio/W6OQI feb 15 2010-80M-SHACK-SNIP.wav
audio/W6OQI feb 15 2010-40M-SHACK SNIP.wav
Transmitting equipment used by K5CM for this FMT:
A HP Z3801 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 300 watts out on 80, 40, and 20 meter. 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 WWV and other GPS referenced sources. 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, but to another GPS source.
I typically see considerably less than 1 mHz difference at 10 Mhz when comparing two Z3801's or a Z3801 and a Thunderbolt, over a 10 to10,000 second period.
80 - Sloping dipole dipole. (favors West, North, East)
40 - Standard Dipole hanging between two 80 foot towers. (favors East, West)
20 - 4 element SteppIr
Current W6OQI FMT transmitting equipment for this FMT:
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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