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No (grid) power company in North America uses 50Hz and for that reason I have a hard time believing that a transmitter in North America would use a 50Hz generator. When I was still living in Holland, we had several 60Hz power generators since they originally came from the US army, but the reverse would be strange. So my guess would be that the 50 Hz hum transmitter would come from outside North America. Rene - VE6WCA On 12-07-02 06:04 PM, Brandon Longo wrote: > Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from this > list > > Particularly odd is that the 50 Hz frequency doesn't correspond with the > signal strength, S9+20dB (on my radio and location) usually comes from North > America. Perhaps Pedro's >15 MHz transmitter requires 50 Hz and is being run > off a generator, but this doesn't explain the lack of "Atencion" (unless > they removed it, as I never made it to a 5/6 MHz transmission in time to > check). If I remember where I put my recordings from last year I might be > able to find a SSB recording of V2a 13380 kHz in AM mode; that should show > the carrier and the associated hum. For now, I'll build and test a loop > antenna and DF the source. > > -----Original Message----- > From: Rene Matthijssen > Sent: Monday, July 02, 2012 4:17 > To: Shortwave Spy Numbers Stations > Subject: Re: [Spooks] Differences between 18Mhz and 6Mhz V2a > > Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from > this list > > My guess would be not only a different transmitter site, but even a > different country. > > * See: > http://www.school-for-champions.com/science/ac_world_volt_freq.htm > for an explanation. > * Also: > http://www.school-for-champions.com/science/ac_world_volt_freq_list.htm > for a list of countries and their voltages / frequencies. > > Unless it runs generator power half the time, which would be unlikely. > Rene - VE6WCA > > > > On 12-07-01 09:51 PM, Brandon Longo wrote: >> Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from >> this list >> >> I've noticed that the AC hum on the 18 MHz daytime V2a transmission was 50 >> Hz, while the 6.8 MHz nighttime V2a is 60 Hz. Would this indicate >> different transmitter sites? >> ______________________________________________________________ >> Spooks mailing list >> Home: http://mailman.qth.net/mailman/listinfo/spooks >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Spooks@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > ______________________________________________________________ > Spooks mailing list > Home: http://mailman.qth.net/mailman/listinfo/spooks > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Spooks@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Spooks mailing list > Home: http://mailman.qth.net/mailman/listinfo/spooks > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Spooks@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Spooks mailing list Home: http://mailman.qth.net/mailman/listinfo/spooks Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Spooks@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
