*** Note important updates in this information *** The Midwest VHF/UHF Society (located in Southwest Ohio) is pleased to announce that the first annual MVUS Frequency Measuring Test will be held on Saturday, October 13, 2007. There will be two transmission periods: the first at 14:30 EDT (1830 UTC), and the second at 21:30 EDT (0130 UTC Sunday). Transmissions will be on the 80M, 40M, and 30M amateur bands from Dayton, Ohio under the callsign W8KSE.
Frequencies will be approximately: 3555 kHz, 7055 kHz, and 10115 kHz, but be prepared to tune as we will adjust to minimize QRM. We've obtained the loan of a heavy-duty amplifier, and hope to run close to 1 KW on 80 meters for the daytime run, and on either 80 or 40 (depending on our sense of the propagation) for the evening run. The other transmitters will be running about 75 watts output. We'll be using wire antennas for each band. All the transmitters will be driven from a common frequency standard. We will transmit on all three bands simultaneously. Plans are to transmit two 10 minute test periods, and a third if the transmitters aren't melting by that point. The frequency will be changed by a small amount (less than 200 Hz) between transmission periods. So, a complete submission will include two or three separate measurements for each band. Our goal is to transmit a signal known in frequency to parts in 10e-12 (i.e., less than 0.0001 Hz error at 10 MHz) and stable to a similar level during the course of the transmission. Frequencies will be measured at the transmitter site with a system capable of microHertz resolution referenced to a GPS disciplined oscillator, and will also be monitored by another station in groundwave range that can measure the frequencies with similar accuracy. The MVUS Frequency Measuring Test is intended to supplement, not replace, the ARRL FMT. Further information will be posted at http://www.febo.com/time-freq/FMT. You can also send email with questions or comments (or, after the test, your results!) to "[EMAIL PROTECTED]". We've had some donations, so we are happy to announce that the grand prize will be a TAPR TADD-1 distribution amplifier kit, and additional prizes of ARRL publications will also be awarded. We're still trying to figure out just how to determine winners, so you'll have to trust us. :-) For discussion about off-air frequency measurement, we suggest you check out the FMT-nuts mailing list, sponsored by Connie Marshall, K5CM. For details, go to http://tech.groups.yahoo.com/group/FMT-nuts/. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
