[time-nuts] Racal 9420 OCXO

Dan Rae danrae at verizon.net
Thu Aug 25 16:22:44 UTC 2011

On 8/25/2011 9:01 AM, Bob Camp wrote:
> Hi
> Do we know for sure that Racal actually made these OCXO's in house?
> My *guess* is that they were made by various companies over the years and
> sold to Racal. The "return for service" would have been a return to Racal
> and then they forward it to the people who made it...
Having just been inside one Bob, I can say for sure, yes, they were made 
by Racal at I presume Bracknell, the sub assemblies all have racal style 
part numbers and use similar components to a lot of the instruments of 
that period.

Also having just been in a 9420 I can totally see why they didn't want 
anyone mucking about inside it.  I suspect like the -hp- 10811 there 
were some adjust on test values that depended on the individual 
crystals.   But all that doesn't apply to us time nuts does it?    I 
didn't consider myself a true "nut" until I'd been inside and fixed a 
dead 10811 with an open thermistor :^).  In any case Racal as such is 
long gone and there's no one to return them to any more so we don't have 
a lot of choice.


More information about the time-nuts mailing list