[time-nuts] HP E1938A Oscillator

[Bruce Griffiths]

Magnus Danielson wrote:
> Hi Perry,
>
> On 07/05/2013 07:23 AM, Perry Sandeen wrote:
>>
>>
>> List,
>>
>> I was looking on Ebay for some HP E1938A
>> oscillators
>>
>> What I found listed were:
>>
>> HP E1938A 10 MHz Quartz Oscillator with EFC on PC
>> board. $100 Fluke.l
>>
>> HP E1938-60201 Ovenized Crystal Oscillator  (on a PC board) $100 Tomy 
>> Chou
>>
>> HP E1938A Ovenized Crystal Oscillator  W/O a PC board for $50 and 
>> free shipping from  2010bluebook.
>> My question is thus:  What does the PC board do?  All I need is a HP 
>> EFC oscillator that would
>> be better that my HP 10811-60111’s.
>>
>> Do I need to worry that the E1938A’s without the
>> board maybe of lessor quality than the others?
>>
>> Fluke.l says his units are good but not stellar.  The other venders 
>> say they have tested the
>> units and guarantee them to be good.  If
>> so, would it get better with aging?
>>
>> So what does the collective wisdom/experience of
>> the group think?  TIA
>
> Don't get the puck only. Pulling it from the board with all it's 
> support functions, including oven controller etc. was a bad move. Do 
> look at the material online to see what I mean.
>
> Cheers,
> Magnus
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However the pucks can be a useful replacement when an E1938A oscillator 
fails as one of mine did.

Bruce