Burt search time nuts its all there. Its not a kit by any means. Spectracom did a very good job. To good, though in reality they simply reused the phase tracking rcvr from other units. Essentially the system locks to the stable carrier creating a local replica and then removes the carrier recovering just the AM. Or think of it as subtracting the carrier leaving just the data. Very good design very bad for PSK, since the carrier no longer has a relationship. Nist and spectracom did put notices and such out for over a year, so what can you say. Though we all have lots of strong opinions actually. Don't want to start that thread again. I have often thought and will spend no time doing it. Simply replace the demod with a diode detector. Now its not actually quite that easy. But if the only thing I had was a 8170 what the heck. The schematics of the system are available at spectracom.
Near as I can tell the 8170 would run about 2 days on a fix. Off to seriously sleazzy land. You could always bugger a gps clock into the system adapting GPS time to local time by a micro. But that really is ugly. Though you end up with those nice clock digits working again. Hey when you do that send me the old rcvr parts. ;-) Regards Paul. On Thu, Jun 13, 2013 at 12:37 AM, Burt I. Weiner <b...@att.net> wrote: > Paul, > > Ummmm... What a revolting development this is. My 9150-52054 have a > smaller readout out that I can't see without climbing up on my bench, so I > suppose I will no longer know what time it is. > > I've never really had to delve into the 8170 so I wasn't up to speed on > how they derived the data from the carrier prior to the new PSK format. I > was under the misunderstanding that it was strictly from amplitude > variation. I guess it is, except for the manner in which they determine > the changes. > > Please tell me about the "d-psk-r" you mentioned. Also do you know the > times of day WWVB reverts to the old method and for how long? I'll have to > go to their site and see. > > Burt, K6OQK > > At 04:46 PM 6/12/2013, time-nuts-requ...@febo.com wrote > >> Burt >> One other tidbit the phase mod will exactly cause what you see. >> Spectracom used phase tracking to demodulate the AM time signal. Thats why >> its nuts. >> >> >> On Wed, Jun 12, 2013 at 5:49 PM, paul swed <paulsw...@gmail.com> wrote: >> >> > Burt >> > There is nothing wrong with your 8170. WWVB no longer allows it to work >> > correctly because of the phase modulation. They went to all psk about 1 >> > month ago. They had been reverting back twice a day for things like the >> > 8170. >> > So the ole 8170 is dead. >> > You need to build something like the d-psk-r to get it going though I >> have >> > not had time to actually add the am phase flipper precisely for the >> likes >> > of a 8170. I have one also. >> > Sorry >> > Paul >> > WB8TSL >> >> >> > On Wed, Jun 12, 2013 at 5:35 PM, Burt I. Weiner <b...@att.net> wrote: >> > >> >> My good old Spectracom 8170 is not setting time. I don't use it for >> >> frequency, just as a clock for my Hazetorium. I live about 20 minutes >> >> north of downtown Los Angles in Glendale. The antenna I'm using is the >> >> Ferrite Rod loop in PVC that came with the 8170. It's located on my >> back >> >> porch just laying on the floor with its maximum pickup direction >> towards >> >> Boulder, Colorado. It has worked reliably for many years in that >> location. >> >> >> >> The symptoms are... >> > > 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. > _______________________________________________ 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.
