[time-nuts] Opening an Isotemp OCXO
preilley_454 at comcast.net
Fri Oct 28 15:07:36 EDT 2016
There is no regulator chip in the unit. I am thinking that this must
be a 5 volt unit.
On 10/28/2016 12:42 PM, Dan Rae wrote:
> On 10/28/2016 9:09 AM, Peter Reilley wrote:
>> The only document that I could find said 12 volt.
> The 82 series came in a lot of flavors. I have one 82-49 which is
> definitely 12V ( draws 0.12A when warm and maybe 0.3 when cold) and
> has a 5V pp square wave output at 10 MHz. It also has a Vref output
> and an EFC input. What is odd about this one is that it came to me
> from a TRW swap meet scrap dealer who bought stuff from Cubic
> Communications in San Diego and it had a "Reject" tag from them.
> Probably because it was supposed to be a 5 MHz unit as marked, so
> presumably had the wrong crystal fitted by Isotemp. Other versions of
> the 82 series (-10) were fitted to Racal Receivers like the
> RA6790/GM. Screw adjustment on the side and 5 MHz output.
> Are you sure yours shouldn't have a 5V supply on that output IC? Could
> be why it died if there is an internal regulator that failed putting
> the full supply voltage on the IC?
More information about the time-nuts