The MVUS FMT:
These are the results of the Midwest VHF/UHF Society Frequency Measuring
Test held on 19 October 2007 (UTC).
April 2008 Results
The WinnersParticipation in this test was lower than last October, but we still had some very good results. Based on lowest average fractional offset, the winner on 20M was Reid Bishop at 6.29x10-10, while the 40M winner was Jacques Audet at -6.75x10-9. The single best measurement belongs to Reid, at 8.59x10-12 for his 2nd 20M reading.
|20M #1||14 054 044.380 246|
|20M #2||14 054 121.680 879|
|20M #3||14 054 098.377 773|
|40M #1||7 056 013.836 603|
|40M #2||7 056 097.736 614|
|40M #3||7 056 103.136 619|
For this FMT, we were not able to have as precise a frequeny measurement system at the W8KSE site as we were for the October 2007 test. There was a consistent bias, particularly on 20M, between the local measurement at W8KSE and the remote measurement at N8UR. We have not been able to identify the source of this bias, but our analysis, as well as the separate measurements by N8ZM (who was at the N8UR site, but using his own equipment) lead us to believe that the N8UR results should be accepted as "correct".
However, we also note that the majority of the 40M readings were clustered in the 8s and 9s low. We're not sure how to account for that, as on 40M both our calculated and locally measured frequencies were consistent a couple of orders of magnitude better than that.
The systems at W8KSE and N8UR were the same as used in October 2007, with the exception that we did not use the TSC-5120A frequency analysis box at W8KSE this time. Details of the frequency generation/transmission system, and the N8UR monitoring system, are at the 2007 FMT Description page, and here's a photo gallery showing the hardware.
|Fractional Error||20 M Avg||40 M Avg||20M-1||20M-2||20M-3||40M-1||40M-2||40M-3|
|Richard W Dabney||-3.29E-09||-2.32E-08||5.53E-09||-5.11E-09||-1.03E-08||-1.91E-08||-2.33E-08||-2.72E-08|
|1st Place||Reid||Jacques||Reid||Reid||Reid||Jacques||Bill B.||Jacques|
|2nd Place||Richard||Jeff||Richard||Mike||Mike||Bill R.||Brad||Jeff|
|3rd Place||Mike||Bill R.||Jeff||Richard||Marvin||Jeff||Jeff||Bill R.|
|Single Lowest Offset:||Reid|