Yes, I see what it does. It is a simple circuit. But I just thought (wrongly, now I see) that the 8170 somehow used the 60KHz signal for some purpose. I gues not, It is just a carrier that is discarded.
Some receivers used the 60HKz signal as a 60KHz frequency reference and phase locked their internal clock to the 60KHz signal. I gues the 8170 does not do that. On Mon, Jun 17, 2013 at 10:56 AM, Burt I. Weiner <b...@att.net> wrote: > Chris, > > I think Paul really came up with an elegant answer. As you well know, the > problem with the new format and phase locked receivers is that WWVB's phase > is now being shifted for the new encoding scheme. It's this phase shifting > that's messing up the phase locked receivers like the Spectracom 8170. > Part of Paul's circuit generates a new 60 kHz signal that's not phase > shifted. The receiver portion of his circuit decodes the dips that WWVB > still transmits, and outputs the data which is used to turn on and off a > "switch" that drops the new 60 kHz signal by approximately 14 dB in sync > with the WWVB dips. I'm going to build this circuit, but I'm planning on > using the receive module out of one of the many "Atomic Clocks" that I have > around. I guess you could ask, Why don't I just put the Atomic clock on > the wall in my shoppe and forget about the 8170? An honest answer to that > is, that's no fun. > > In a sense you could say that Paul's circuit does get the WWVB signal to > the receiver - it's just a new phase stable version of the signal signal. > This way I don't have to mess with the insides of the 8170. > > Burt, K6OQK > > From: Chris Albertson <albertson.ch...@gmail.com> >> >> <time-nuts@febo.com> >> Subject: Re: [time-nuts] WWVB remodulator for the spectracom 8170 the >> >> >> I'm looking at the schematic. I thought the goal was to get the 60KHz >> signal from WWVB to the HP unit. This schematic sends an approximatly >> 60KHz signal from the tuning fork to the HP. but copies the AM modulation >> from WWVB. So the 8170 does not look at the 60KHz carrier? and only cars >> about the time code? >> >> Maybe another way then is to bypasss the radio inside the 8170 and just >> send the demodulated logic bit >> >> > Burt I. Weiner Associates > Broadcast Technical Services > Glendale, California U.S.A. > b...@att.net > www.biwa.cc > K6OQK > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.