K5CM FMT - October 6, 2010 Results

 

TX Frequencies
K5CM W6OQI
160, 1845131.154
80M 3576077.626 3567001.574
40M 7067000.959

 

 


 

Stations submitting readings 1 Hz or better on all possible bands, ranked by average error

 

Call Section Grid Error in PPX
W3JW VA FM17tn 1.89E-08
WB0LXZ KS EM27pk 2.52E-08
AA8K MI EN82sx 2.57E-08
VE2IQ ON FN15nt 2.83E-08
K4COD GA EM73sd 2.92E-08
K6OQK* LAX DM04ud 3.22E-08
W9TJ IL EM48 3.34E-08
W4UK SC EM93an 3.70E-08
K5XL NTX EM12kp 3.72E-08
VE3OAT ON FN25eg 3.75E-08
W9ZB IN EM69 4.31E-08
WA1ABI RI FN41jp 4.77E-08
K6BZZ AZ DM33xb 6.69E-08
N5DM STX EL29fs 7.27E-08
N2GL OR CN85ko 8.33E-08
KMZ KS EM28ix 1.07E-07

*May be in ground wave range of W6OQI

 


 

A look at all readings 10 millihertz or better:

 

Call Section Grid TX Frequency Measured Freq Error in Hz Error in PPX
      K5CM 160M      
K6BZZ AZ DM33xb 1845131.154 1845131.155 0.001 5.42E-10
W6OQI LAX DM04vf 1845131.154 1845131.153 -0.001 5.42E-10
W3JW VA FM17tn 1845131.154 1845131.156 0.002 1.08E-09
K5XL NTX EM12kp 1845131.154 1845131.157 0.003 1.63E-09
WA1ABI RI FN41jp 1845131.154 1845131.150 -0.004 2.17E-09
W9TJ IL EM48 1845131.154 1845131.150 -0.004 2.17E-09
AA8K MI EN82sx 1845131.154 1845131.160 0.006 3.25E-09
K6OQK LAX DM04ud 1845131.154 1845131.162 0.008 4.34E-09
VE3OAT ON FN25eg 1845131.154 1845131.145 -0.009 4.88E-09
      W6OQI 80M      
K6OQK* LAX DM04ud 3567001.574 3567001.576 0.002 5.61E-10
WB6RQN SV CM98mq 3567001.574 3567001.579 0.005 1.40E-09
      W6OQI 40M      
K6OQK* LAX DM04ud 7067000.959 7067000.958 -0.001 1.42E-10
K5XL NTX EM12kp 7067000.959 7067000.961 0.002 2.83E-10
K6HGF* LAX DM04 7067000.959 7067000.95 -0.009 1.27E-09

*May be in ground wave range of W6OQI

 


 

Despite the weak 160 meter signal reported by some, this band offered the best Doppler free source, with 9 sub 10 mhz readings. Both 80 meter signals had considerable Doppler, with most stations reporting the frequency on the low side. 

 


 

Comments:

 

KK8O OH EN80or First try with a new receiver.
W6OQI LAX DM04vf K5CM signal on 80 meters was S9 with usual doppler but not the worst I have seen here in Southern California.  The K5CM signal on 160 meters was weak and hard to find.
N8OB OH EN80ko 80M had very good sigs.  160M was very weak here. 40M was weak also.  Fun as usual.
W2VQS OK EM15jg  
N2GL OR CN85ko HP3335A diciplined by HP Z3816A gps reference.706mkIIG rx with SpecLab reading 500Hz beat. QRM thru wide AM filter. Poor conditions except great signal on 80 from W6OQI. Never identified 160m signal. Thanks for the FMT Connie and Charles!
W9ZB IN EM69 Strong sigs from K5CM with some QSB on 160. Weak but usable 40M from W60QI, 80M a little better, also with QSB, but fun! TNX guys.
WA6NOL ORG DM13br This is my first try at FMT. I just to see how good my Flex-5000A is.73, Richard C. Thompson, WA6NOL wa6nol@wa6nol.com
KMZ KS EM28ix Great job tonight, Connie and Marvin.  Connie's 80 and 160 meter sigs were very strong in KS. 80 had some doppler while 160 had very little to my ear.  Marvin's 40 meter signal was just above the noise level in KS.  His 80 meter signal was S7 with QSB.  All match pitch tuning by ear. SX-73 receiver worked the best tonight except for Connie's 80 meter signal received on Atlas 210-X.  Great evening for a fun FMT.
N5DM STX EL29fs Kenwood TS-480 and DigiPan v2.0. Minor doppler all signals. Thanks K5CM/W6OQI.
AB4RS VA FM18hw Had great copy on K5CM signals, but recorded sound files are blank. AARGH! Going by notes and recollection, but will be lucky to be within 10 Hz. W6OQI was weak but readable, should do much better there. Used HP3336C referenced to Trimble Thunderbolt. Injected known reference signel, tuned RF using Yaesu FT897d, and SpectrumLab to analyze the audio to determine the offset.
N7EP WWA CN87uk No signal from K7CM on 160M which agrees with my progagation model.  Very very weak unreadable but visible on spec. lab signal from W6OQI on 40M which disagrees with my progagation model.  It should have been an S5 to S9? My receiver calibration signal from WWV on 2.5 MHz was weak but very stable within +0.004 hz on my receiver during the FMT. This FMT probably had the poorest progagation I've seen but still fun to try.  Where are the sunspots when we need them? Thanks Connie  
K6OQK LAX DM04ud Connie's 80-Meter signal was very strong but I had trouble tuning in his 160-Meter signal.  I could hear the call-up going in and out of the noise, but when the steady carrier came on I was able to glom onto what I hope was it.  Marv's 40-Meter signal was nice and steady, but his 80-Meter signal had quite a bit of Doppler for being only 8 miles away.  My normal 210' span Inverted-V is down right now and I only have a 60' span dipole about 5' above the garage roof; not real good on 160-Meters.  Again, thanks to Connie and Marv and to Pam and Herta for loaning us their mates for another fun filled evening.
WA1ABI RI FN41jp Good sigs from K5CM and fair sigs from W6OQI. Thanks Connie and Marvin. 73
WA2DVU SNJ FM29ob Hi Connie,  I think your ack reverses the band=fx readings!  Thanks again for the test.
VE2IQ ON FN15nt Good sigs, routine. Did not try to outguess Doppler, let computer do all the work. Spreads tight so I may be OK. Thanks for another great test.
WA4FJC VA FM08lf Used 80 M dipole and HP 3586B.  160 and 40 M sigs heard but to weak to measure.  Tnx for the signals.  73 Gordon
K6BZZ AZ DM33xb Lots of frequency shift on K5CM 80 meter run. A nearby JT-65 signal was in there too. 160 mtr sig good. W6OQI weak on 40 and loud on 80. Interesting conditions. Thanks for running the tests. Always fun and challenging.
WB6RQN SV CM98mq This is my first time trying this. The 40m sig was very weak at my QTH, probably not more than about 4dB S/N. I couldn't fully copy the CW and couldn't tell exactly when the test signal cut off but the data looked pretty good anyway. 80m was *much* stronger (+30dB) with a lot more frequency variation. Just looking at the variation patterns is intriguing. It is hard to estimate a frequency to 1mHz when the variation is over 800mHz! Doing this is NOT as easy as it seems like it should be. :-) I'm hooked!
K6HGF LAX DM04 No copy on Connie's 160 meter signal. Thanks to Connie and Marv for another FMT.
K9KK OK EM15 My wonderful PC crashed in the middle of the run so results are highly suspect.  Used GPS disciplined HP3336B RF generator for reference Frequency and Spectrum LAB to compute the DELTA.
K5XL NTX EM12kp Signals were strong enough but the doppler on W6OQI was nasty!  Equipment: FT-1000mp with TCXO calibrated to local GPS locked AM station KFLC 1270 Fort Worth TX.  Measured audio hetrodyne freq with SpecLab on computer with Sound Blaster Audigy soundcard calibrated to WWV 500 hz standard tone.  Thanks to K5CM and W6OQI for the FMT.
KD2BD NNJ FN20xd The Kp-index hovered around 2 around the time of the FMT, a decline from 3 earlier in the day.  Connie had a fairly good signal into New Jersey on 80, and a somewhat weaker (but usable) signal on 160.  Marvin was in and out of my noise level on 80, making accurate measurements difficult at best.  Thanks to all involved for making this FMT possible.
W9TJ IL EM48 K5CM 80 S9+20 with some sort wideband digital QRM, 160 S9 with fading.  W6OQI 40 S7 with QSB, 80 in noise and fading.  I now feel at home with SpecLab but EXEL still gives me problems.  Overall a fun FMT.  Thanks to both for making it possible.    73    Tom
K4COD GA EM73sd This is my first attempt at an FMT.  I've spent quite a bit of time learning, calibrating, and planning.  I hope that I did fairly well.  The doppler effect was a real problem.  I used a Yeasu FT-1000MP Mark V Field, calibrated to a local GPS locked AM broadcast station.  Used the Spectrum software for measurement.  Thanks for running the tests.
K1GGI EMA FN41wr Usable signals all around. Thanks guys.
VE3OAT ON FN25eg Lots of QSB and Doppler on W6OQI's signal.  Had to retire my old Sulzer lab freq standard.  Now using a Spectracom 8164 WWVB-disciplined freq standard with my own decade dividers to get 1 kHz markers and SpectrumLab software to measure the freq differences.  (Starting to explore other methods as well.) 
WB0LXZ KS EM27pk Thanks for another FMT. Fun. Homebrew TCXO locked to GPS, synchronizing HP3586B and HP3335A marker. I used Open Office spread sheet to analyze Spectrum Lab export files, and had to struggle with some functions. Good copy on all sigs. No excuse if I don't score well. -bill
W3JW VA FM17tn Signals were very good for this test and the atmospherics were calm. Thanks for the "warm-up" for the upcoming fall ARRL test
W4UK SC EM93an Copied all 4 signals, though Marvin's was not strong here in SC. Thanks for another good FMT. Jerry W4UK
AA8K MI EN82sx Peak signal levels received in dBm:  K5CM 80M -82, K5CM 160M -91, W6OQI 40M -77, W6OQI 80M -94 WWV 2.5MHz -84, WWV 5MHz -62, WWV 10MHz -84.  Antenna: ground-mounted vertical 20 meters high.  I used only Open HPSDR, Thunderbolt GPSDO, and Spectrum Lab. I offset HPSDR about 500 Hz to make an tone with its BFO, used PowerSDR to make a wave file. Play the wave file back and run Spectrum Lab, note the offset from the HPSDR frequency.
W1PW AZ DM33 Thanks Connie and Marv for these tests. Missed the W6OQI 40 Meter measurement due to an unexpected, but important phone call(!)  Equipment: Trimble DGPS,FT817nd, SL v2.75, Excel worksheet.
AF9A IN EM69wv  
K5CM OK EM25 Good signals from marvin on 40 meters. A little problem on 80 meters as Marvins signal happened to fall on a digital noise birdie

 


 

K5CM 160 Meters

 

Call Section Grid TX Frequency Measured Freq Error in Hz Error in PPX
K6BZZ AZ DM33xb 1845131.154 1845131.155 0.001 5.42E-10
W6OQI LAX DM04vf 1845131.154 1845131.153 -0.001 5.42E-10
W3JW VA FM17tn 1845131.154 1845131.156 0.002 1.08E-09
K5XL NTX EM12kp 1845131.154 1845131.157 0.003 1.63E-09
WA1ABI RI FN41jp 1845131.154 1845131.150 -0.004 2.17E-09
W9TJ IL EM48 1845131.154 1845131.150 -0.004 2.17E-09
AA8K MI EN82sx 1845131.154 1845131.160 0.006 3.25E-09
K6OQK LAX DM40ud 1845131.154 1845131.162 0.008 4.34E-09
VE3OAT ON FN25eg 1845131.154 1845131.145 -0.009 4.88E-09
AF9A IN EM69wv 1845131.154 1845131.165 0.011 5.96E-09
WB0LXZ KS EM27pk 1845131.154 1845131.142 -0.012 6.50E-09
KD2BD NNJ FN20xd 1845131.154 1845131.171 0.017 9.21E-09
W1PW AZ DM33 1845131.154 1845131.173 0.019 1.03E-08
W4UK SC EM93an 1845131.154 1845131.127 -0.027 1.46E-08
VE2IQ ON FN15nt 1845131.154 1845131.189 0.035 1.90E-08
K4COD GA EM73sd 1845131.154 1845131.193 0.039 2.11E-08
WA2DVU SNJ FM29ob 1845131.154 1845131.100 -0.054 2.93E-08
W9ZB IN EM69 1845131.154 1845131.090 -0.064 3.47E-08
N2GL OR CN85ko 1845131.154 1845131.020 -0.134 7.26E-08
N5DM STX EL29fs 1845131.154 1845131.300 0.146 7.91E-08
K1GGI EMA FN41wr 1845131.154 1845131.525 0.371 2.01E-07
KMZ KS EM28ix 1845131.154 1845131.700 0.546 2.96E-07
N8OB OH EN80ko 1845131.154 1845130.580 -0.574 3.11E-07
AB4RS VA FM18hw 1845131.154 1845128.000 -3.154 1.71E-06
W2VQS OK EM15jg 1845131.154 1845138.000 6.846 3.71E-06
KK8O OH EN80or 1845131.154 1845119.100 -12.054 6.53E-06
K9KK OK EM15 1845131.154 1845004.062 -127.092 6.89E-05

 

 


 

K5CM 80 Meters

 

Call Section Grid TX Frequency Measured Freq Error in Hz Error in PPX
VE2IQ ON FN15nt 3576077.626 3576077.637 0.011 3.08E-09
N7EP WWA CN87uk 3576077.626 3576077.641 0.015 4.19E-09
WB0LXZ KS EM27pk 3576077.626 3576077.61 -0.016 4.47E-09
WA1ABI RI FN41jp 3576077.626 3576077.646 0.020 5.59E-09
W3JW VA FM17tn 3576077.626 3576077.659 0.033 9.23E-09
W9TJ IL EM48 3576077.626 3576077.592 -0.034 9.51E-09
AA8K MI EN82sx 3576077.626 3576077.58 -0.046 1.29E-08
AF9A IN EM69wv 3576077.626 3576077.577 -0.049 1.37E-08
VE3OAT ON FN25eg 3576077.626 3576077.678 0.052 1.45E-08
WA2DVU SNJ FM29ob 3576077.626 3576077.55 -0.076 2.13E-08
KD2BD NNJ FN20xd 3576077.626 3576077.543 -0.083 2.32E-08
K4COD GA EM73sd 3576077.626 3576077.719 0.093 2.60E-08
W4UK SC EM93an 3576077.626 3576077.724 0.098 2.74E-08
W9ZB IN EM69 3576077.626 3576077.725 0.099 2.77E-08
K9KK OK EM15 3576077.626 3576077.502 -0.124 3.47E-08
WA4FJC VA FM08lf 3576077.626 3576077.5 -0.126 3.52E-08
K5XL NTX EM12kp 3576077.626 3576077.441 -0.185 5.17E-08
N2GL OR CN85ko 3576077.626 3576077.439 -0.187 5.23E-08
N5DM STX EL29fs 3576077.626 3576077.35 -0.276 7.72E-08
W1PW AZ DM33 3576077.626 3576077.335 -0.291 8.14E-08
KMZ KS EM28ix 3576077.626 3576078 0.374 1.05E-07
K6BZZ AZ DM33xb 3576077.626 3576077.21 -0.416 1.16E-07
K6OQK LAX DM04ud 3576077.626 3576077.183 -0.443 1.24E-07
W6OQI LAX DM04vf 3576077.626 3576077.164 -0.462 1.29E-07
K6HGF LAX DM04 3576077.626 3576077.1 -0.526 1.47E-07
N8OB OH EN80ko 3576077.626 3576077.089 -0.537 1.50E-07
K1GGI EMA FN41wr 3576077.626 3576078.327 0.701 1.96E-07
AB4RS VA FM18hw 3576077.626 3576080 2.374 6.64E-07
W2VQS OK EM15jg 3576077.626 3576082 4.374 1.22E-06
KK8O OH EN80or 3576077.626 3576054 -23.626 6.61E-06

 

 


W6OQI 80 Meters

 

Call Section Grid TX Frequency Measured Freq Error in Hz Error in PPX
K6OQK* LAX DM04ud 3567001.574 3567001.576 0.002 5.61E-10
WB6RQN SV CM98mq 3567001.574 3567001.579 0.005 1.40E-09
W1PW AZ DM33 3567001.574 3567001.585 0.011 3.08E-09
KD2BD NNJ FN20xd 3567001.574 3567001.592 0.018 5.05E-09
KMZ KS EM28ix 3567001.574 3567001.5 -0.074 2.07E-08
K6HGF* LAX DM04 3567001.574 3567001.65 0.076 2.13E-08
K6BZZ AZ DM33xb 3567001.574 3567001.672 0.098 2.75E-08
K5CM OK EM25 3567001.574 3567001.43 -0.144 4.04E-08
N7EP WWA CN87uk 3567001.574 3567001.407 -0.167 4.68E-08
W3JW VA FM17tn 3567001.574 3567001.399 -0.175 4.91E-08
K4COD GA EM73sd 3567001.574 3567001.373 -0.201 5.63E-08
WA1ABI RI FN41jp 3567001.574 3567001.371 -0.203 5.69E-08
VE2IQ ON FN15nt 3567001.574 3567001.34 -0.234 6.56E-08
AA8K MI EN82sx 3567001.574 3567001.32 -0.254 7.12E-08
WB0LXZ KS EM27pk 3567001.574 3567001.309 -0.265 7.43E-08
K9KK OK EM15 3567001.574 3567001.304 -0.270 7.57E-08
WA4FJC VA FM08lf 3567001.574 3567001.3 -0.274 7.68E-08
N2GL OR CN85ko 3567001.574 3567001.265 -0.309 8.66E-08
N5DM STX EL29fs 3567001.574 3567001.25 -0.324 9.08E-08
W9ZB IN EM69 3567001.574 3567001.248 -0.326 9.14E-08
AB4RS VA FM18hw 3567001.574 3567001.248 -0.326 9.14E-08
K5XL NTX EM12kp 3567001.574 3567001.235 -0.339 9.50E-08
W9TJ IL EM48 3567001.574 3567001.221 -0.353 9.90E-08
W4UK SC EM93an 3567001.574 3567001.22 -0.354 9.92E-08
VE3OAT ON FN25eg 3567001.574 3567001.214 -0.360 1.01E-07
K1GGI EMA FN41wr 3567001.574 3567001.967 0.393 1.10E-07
W2VQS OK EM15jg 3567001.574 3567001 -0.574 1.61E-07
WA6NOL ORG DM13br 3567001.574 3567600 598.426 1.68E-04

*May be in ground wave range of W6OQI

 


 

W6OQI 40 Meters

 

Call Section Grid TX Frequency Measured Freq Error in Hz Error in PPX
K6OQK* LAX DM04ud 7067000.959 7067000.958 -0.001 1.42E-10
K5XL NTX EM12kp 7067000.959 7067000.961 0.002 2.83E-10
K6HGF LAX DM04 7067000.959 7067000.95 -0.009 1.27E-09
KMZ KS EM28ix 7067000.959 7067001 0.041 5.80E-09
W4UK SC EM93an 7067000.959 7067000.912 -0.047 6.65E-09
WB6RQN SV CM98mq 7067000.959 7067001.01 0.051 7.22E-09
AB4RS VA FM18hw 7067000.959 7067000.883 -0.076 1.08E-08
K9KK OK EM15 7067000.959 7067000.878 -0.081 1.15E-08
K4COD GA EM73sd 7067000.959 7067001.052 0.093 1.32E-08
AA8K MI EN82sx 7067000.959 7067000.85 -0.109 1.54E-08
WB0LXZ KS EM27pk 7067000.959 7067000.849 -0.110 1.56E-08
W3JW VA FM17tn 7067000.959 7067000.845 -0.114 1.61E-08
W9ZB IN EM69 7067000.959 7067001.092 0.133 1.88E-08
K5CM OK EM25 7067000.959 7067000.823 -0.136 1.92E-08
W9TJ IL EM48 7067000.959 7067000.798 -0.161 2.28E-08
VE2IQ ON FN15nt 7067000.959 7067000.777 -0.182 2.58E-08
VE3OAT ON FN25eg 7067000.959 7067000.749 -0.210 2.97E-08
N5DM STX EL29fs 7067000.959 7067000.65 -0.309 4.37E-08
N7EP WWA CN87uk 7067000.959 7067001.475 0.516 7.30E-08
N8OB OH EN80ko 7067000.959 7067000.441 -0.518 7.33E-08
N2GL OR CN85ko 7067000.959 7067001.82 0.861 1.22E-07
K6BZZ AZ DM33xb 7067000.959 7067001.829 0.870 1.23E-07
WA1ABI RI FN41jp 7067000.959 7067001.851 0.892 1.26E-07
K1GGI EMA FN41wr 7067000.959 7067002.157 1.198 1.70E-07
W2VQS OK EM15jg 7067000.959 7066999 -1.959 2.77E-07
WA6NOL ORG DM13br 7067000.959 7067602 601.041 8.50E-05

 


Audio snippets recorded by WA1ABI

 

audio/k5cm 160m by abi-oct-2010.wav

 

audio/k5cm 80m by abi-oct-2010.wav

 

 

audio/w6oqi 80m by abi-oct-2010.wav

 

audio/w6oqi 40m by abi-oct-2010.wav

 

 


From K5XL

I've attached a graph of my results from this test.  The scale is in millihertz and depicts the audio beat note measured by speclab when the radio is tuned about 500 Hz from the carrier.  The dark blue line is your reported tx freq and the orange line is my measured average of the samples (yellow).    I am amazed at the 80 meter results vs. the other bands.  My 80 meter results are .2 to .3 hertz off.  Can Doppler have this much effect for the entire 5 minutes?  I shouldn't be too surprised as I see this with WWV regularly.

 

 

 

 


 

 

 

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 350 watts out on 160, and 80 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. 

 

Antennas:

160 - Vertical

80 - Sloping dipole dipole. (favors West, North, East)

 40 - Standard Dipole hanging between two 80 foot towers. (favors East, West)

 

 

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. 

 

73,

Connie

K5CM

 

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