[time-nuts] Re: Isotemp OCXO question

[Robert DiRosario]

I found that very late the other night.  I don't think that's it because 
the
physical construction is different.  I've attached some photos.  I think 
this
Time Code Translator thing is very old, the device is made from 68 SSI LS
TTL chips, wire wrapped!

I suspect this OCXO predates their website, and the internet.  I guess I
just need to test it and see what it does.  I suspect the screw on the top
covers a frequency adjustment resister or capacitor or something.

Robert


On 08/20/2021 02:01 AM, Keelan Lightfoot wrote:
> Internet Archive to the rescue!
>
> https://web.archive.org/web/19990506093727/http://www.isotemp.com/ocxo59.htm
>
> According to that page, the OCXO59 series is available in 5 MHz to 50
> MHz... So a 1MHz version may have been an OEM version.
>
> >From a later archive of their site, here's a PDF datasheet for a 50 MHz
> OCXO59 series oscillator which includes a drawing for the 59 series with a
> pinout:
>
> http://www.isotemp.com/wp-content/uploads/2011/06/Legacy59-21.pdf
>
> On Thu, Aug 19, 2021 at 3:56 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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