I was thinking of a new alternative we may have not considered. Absolutely near field. The solar panels popping up on the roofs then hitting an inverter sync'ed to 60 Hz X 1000 would be a mighty fine transmitter. I know in our area numbers of homes now have them on the roofs. Regards Paul WB8TSL
On Sat, Nov 15, 2014 at 4:48 PM, Brooke Clarke <[email protected]> wrote: > Hi Ed: > > The DISEqC protocol is a low level signal at 22 kHz which would not make > the signal being discussed. > If it was me I wouldn't look to the neighbor until I was sure it was not > coming from my house, hence the shut down the house first approach. > > It's very difficult to generate any signal strength near 60 kHz so rather > than suspect a powerful transmitter it's more likely near field and very > close by. > WWVB has a small fortune in their antenna. I ran a "Lowfer" beacon "LAH" > on 175 kHz with a 50 foot tall antenna and the signal strength was quite > small because the antenna is a very small fraction of a wavelength. > > http://www.prc68.com/I/FTA.shtml#DISEqC > Mail_Attachment -- > Have Fun, > > Brooke Clarke, N6GCE > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > http://www.prc68.com/I/DietNutrition.html > > ed breya wrote: > >> A signal like that coming from a dish makes some sense to me. I vaguely >> recall from about ten years ago investigating how the satellite receivers >> work, that a fairly strong control signal of around 20 kHz was used in some >> to select the various LNBs and their polarizations in more complicated >> systems. This was passed via the cables superimposed on the DC power along >> with the returning IF signals between the set-top box and the dish units. >> >> If the neighbor's setup has a bad connection in a cable end, there could >> be a pretty strong third harmonic of a 20 kHz-ish signal leaking out, with >> a good-sized antenna possibly formed by maybe 50-100 feet of partly-opened >> cable shield, depending on the possible ground loop paths. Another >> possibility is if the LNB power line from the STB has lots of 20 kHz-ish >> noise on it from a failure in the local SMPS. >> >> If the possible faults were large, you would think it would be noticed as >> a reception problem by the neighbor, but maybe a partial problem is enough >> for you to see interference. If the interference is from the control >> signal, it would likely be derived from a uP clock, so quite stable, while >> if it's from SMPS switching, it should not be very stable, and also loaded >> with line frequency sidebands. >> >> If that is the case, maybe you could inform the neighbor so that they can >> fix the problem (or you fix it for them), thus improving their reception >> and reliability, and eliminating the interference. >> >> I could be entirely wrong on this, but your last post rang a bell in my >> head as soon as I saw "satellite dish." >> >> Ed >> >> _______________________________________________ >> 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. >> >> > _______________________________________________ > 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. > _______________________________________________ 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.
