[time-nuts] Looking for a particular OCXO....

Brian, WA1ZMS wa1zms at att.net
Mon May 26 17:54:40 EDT 2014


My high-spec ULN Wenzels have trimmers.

This this thing is 16Hz high at 10MHz so it's way off.  Must be sudden failure. If I use an external ref the test set is fine. OK for lab use. But a pain when out working in the field on ham repeaters. It may be an OEM number.  At work we noticed quite a change in PTI product lines after MTron bought them.

-Brian, WA1ZMS/4
iPhone

> On May 26, 2014, at 5:15 PM, Bob Camp <kb8tq at n1k.org> wrote:
> 
> Hi
> 
>> On May 26, 2014, at 4:31 PM, Brian, WA1ZMS <wa1zms at att.net> wrote:
>> 
>> I am trying to repair my HP-8920 RF Com test set since its internal
>> 
>> 10MHz OCXO has aged way beyond the DAC EFC cal range.
> 
> How far out is it?
> 
>> (There
>> 
>> is no trimmer cap to allow adjustment.)
> 
> Trimmer caps went out a long time ago on OCXO's
>> 
>> 
>> 
>> The OCXO is 10MHz and is marked PTI XO1145.
> 
> It’s probably an OEM part number
>> 
>> PTI no longer lists nor seems to sell this OCXO.
> 
> They likely only sold that part to HP
> 
>> 
>> 
>> 
>> Has anyone seen or have a replacement OCXO or already been
>> 
>> done this path before?  I hate to re-invent the wheel.
>> 
>> I can buy a used A15 ref module but I still may end up with one
>> 
>> that has an OCXO that's out of cal range.
>> 
>> 
>> 
>> Reply off-list is fine.
>> 
>> 
>> 
>> -Brian, WA1ZMS
>> 
>> 
>> 
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> 
> Bob
> 
> 
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