The results of the NZART Doug Gorman Memorial Frequency Measuring Contest 2012 are presented below. These results are provisional and have been checked carefully but if you think an error has crept in please let NZART HQ know as soon as possible.
Propagation conditions this year did not favour precise measurement, but congratulations to winner Mike ZL4OL who did a brilliant job using off-the-air calibration.
The format of the results is Branch (if noted in contest entry) Name Call Average (Hz) Standard Deviation (Hz) Equipment and signals (if noted):
OVERALL
1st Mike ZL4OL 0.015200 0.009985 ICR75 with PA0RDT miniwhip Cal: JJY 40kHz, WWVB 2.5MHz, ZL1BPU S/W: SBSpectrum
2nd Ralph ZL2TV 0.169600 0.190337 Agilent E4403 spec an with NVIS dipole Ref: Adret 10MHz OCXO. Cal: WWV 10MHz Sigs: -60 to -70 dBm
3rd Ian ZL1AOX 0.199200 0.213067 Mercury SDR Ref: HP GPSRA S/W: PowerSDR and Spectrum Lab V2.78 b14 Sigs: S9+10 noise S6
ULTRA
65 Ian ZL1AOX 0.199200 0.213067 Mercury SDR Ref: HP GPSRA S/W: PowerSDR and Spectrum Lab V2.78 b14 Sigs: S9+10 with doppler, noise S6
69 Len ZL2GO 0.212667 0.117121 TS430 Ref:GPS 10MHz with HP8656 interpolation S/W: Spectrum Lab
69 Peter ZL2BIR 0.608750 0.465049 R/S spec an Ref: GPS clock Sigs: Unstable up to 2 Hz jitter
NS Alan ZL3UYJ 3.089333 5.166424 FT840 Ref: Thunderbolt GPS and FEI5690 Rb with MI2023 interpolation S/W: Baudline
NORM EDWARDS
30 Mike ZL4OL 0.015200 0.009985 ICR75 with PA0RDT whip Cal: JJY 40kHz, WWVB 2.5MHz, and ZL1BPU S/W: SBSpectrum Sigs: noisy, QRM near F5
74 Ralph ZL2TV 0.169600 0.190337 Agilent E4403 spec an with NVIS dipole Ref: Adret 10MHz OCXO Cal: WWV 10MHz Sigs: -60 to -70 dBm
65 Riku ZL1KLP 0.262667 0.194037 IC7400 Ref: external OCXO S/W: Spectrum Lab Sigs: Strong but multipath smearing
65 Jack ZL1IJ 0.353600 0.218729 IC756 Pro III Cal: ZL1BPU S/W: Spectran
63 Neil ZL2TNG 0.632800 0.458681 FT767GX with PC
65 David ZL1MR 0.703000 0.340442 TS50 Ref: home brew TCXO Cal: ZL1BPU S/W: SBSpectrum Sigs: good
65 Cliff ZL1RP 0.723600 0.094801 TS940S with PC
69 Max ZL4VV 0.842333 0.306852 Elecraft K3 Ref: TCXO with HP8657B interpolation S/W: Spectrum Lab Sigs: jitter at mHz level
65 Rob ZL1RJS 1.331000 1.253075 TS870 S/W: SBSpectrum V1.11
63 Maurice ZL2ADP 1.352800 0.661475 FT847 S/W: Spectrum Lab
65 Fred ZL1FAV 2.047200 0.564667 IC706 Mk2G with G5RV
65 David ZL1DK 91.14720 4.249512 TS2000X S/W: Spectrum Lab Sigs: good
56 Lorne ZL2AHB 2751.447 4856.138 IC7000 Cal: WWV S/W: WSPR with FMT function
JOHN McKIM CUP
73 Mike ZL2AUA 11.24233 2.374374 IC735 H/W: Mk1 ears
Thank you to all competitors and a particular welcome to the many first timers this year.
Max ZL4VV noted that a CME (coronal mass ejection) event the day before the contest from a filament burst on the sun resulted in a geomagnetic storm level reaching the G2 (moderate) on Monday resulting in the difficult propagation experienced during the contest. As with last year, winner Mike ZL4OL produced an exceptional result. Mike improved his last year’s winning 0.07 Hz avg 0.09 Hz std dev result to an unprecedented 0.0152 Hz 0.009985 Hz, a more precise average with a tighter spread. Congratulations also to Papakura Branch 65 for their continuing high level of participation.
You may note the rather poor camera shots of the freqeuncy counter at ZL4JY in the previous results posting. I had a camera failure after the first two transmissions and had to finish recording with a poorer tablet camera.
John ZL4JY