[time-nuts] Re: Isotemp OCXO question

[paul swed]

The chip will still work. Its just a AM receiver and you get the AM
timecode bits out. It has no value as some sort of reference without
removing the BPSK signal that NIST put on. Lots of posts on that stuff back
in 2012-2015.
Good luck.
Paul
WB8TSL

On Thu, Aug 19, 2021 at 9:09 PM Robert DiRosario <ka3zyx at comcast.net> wrote:

> I have a MAS6180C AM receiver chip, on a board with a few other parts to
> complete the receiver.  I did not make the board, it came from
> Universal-Solder Electronics in Canada.  The date on the chip datasheet
> is 2014 and on the receiver board 2016, so after NIST messed up WWVB in
> 2012.
>
> Robert
>
>
> On 08/19/2021 07:23 PM, Bob kb8tq wrote:
> > Hi
> >
> > It’s a good bet that whatever the spec on that Isotemp OCXO, it’s way
> better in terms
> > of temperature and aging then the DS3231. Is it still on frequency
> (however many years
> > later …..) who knows ….
> >
> > Many of the “time oriented” WWVB devices stopped working when they put
> in the new
> > modulation scheme. It’s a pretty good bet that this applies to the
> device you have.
> >
> > Bob
> >
> >> On Aug 19, 2021, at 6:55 PM, Robert DiRosario <ka3zyx at comcast.net>
> wrote:
> >>
> >> I got a  Trak Systems "Time Code Translator" from ebay.  It's a 1U box
> with large LEDs for DOY and H/M/S that translates IRIG-A to NASA-36 time
> code.  I plan on using the case for my WWVB clock.
> >>
> >> Unexpectedly it has an Isotemp OCXO in it, model OCXO59-11-2, frequency
> marked as 1.000 MHz  The Isotemp website is more or less dead, it has no
> information on it.  Does anyone have any information on this model, like
> how accurate it is?  It has only three wires, which I assume are power,
> ground and output, with no EFC input.
> >>
> >> One thing that I'm sill note sure about is what to do when the receiver
> is not receiving WWVB.  I was thinking of using something like the DS3231
> RTC module.  If this OCXO is better, I may use it.
> >>
> >> Thanks
> >>
> >> Robert
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