[time-nuts] Spectracom 8170 Time of Day grief...

[paul swed]

Burt what you mention was indeed correct. But that non psk time was stopped
about a month ago.
Its pure PSK now as far as I know


On Thu, Jun 13, 2013 at 1:08 PM, Burt I. Weiner <biwa at att.net> wrote:

> Paul,
>
> Thanks for the information. Late last night I did a search and found out
> about the "d-pskr-r" - an appropriate name, indeed. I gather there is no
> final design that says, "Here, build this and it'll work". I have a malady
> that I suspect is common in this group; I hate to throw anything away or
> convert it to a door stop.
>
> Supposedly, WWVB reverts back to the non-psk mode twice a day, at 12:00
> Noon and again at 12:00 Midnight, each time for 30 minutes. Last night my
> 8170 did not set. At my location the signal has been the most stable during
> the day, so I'm going to watch it today at noon. I'll report my useless
> findings afterwards. If it were to set once every 24 hours I would probably
> be happy as I'm not using it to time a network, just to hopefully be a
> little more accurate than my 30 year old kitchen clock.
>
> By the way...  Earlier I mentioned that I have two 9150-52054 GPS units.
> Apparently my mind and fingers were not speaking to each other at that
> moment as I have should've typed, (DATUM) 9390-52054. Both of these run
> 24/7, use separate antennas and are on a UPS. I'm sure you've seen my
> various epistles in this group about them. Since I've changed out their
> power supplies and upgraded their crystal oscillators, they're most happy.
>
> Burt, K6OQK
> www.biwa.cc
>
>
>
>  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 <biwa at 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.
>>
>
> Burt I. Weiner Associates
> Broadcast Technical Services
> Glendale, California  U.S.A.
> biwa at att.net
> www.biwa.cc
> K6OQK
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