[time-nuts] (no subject)

Bob Camp lists at rtty.us
Sun Jun 20 12:04:55 EDT 2010


Hi

No nothing would suggest a power supply to me. I'd certainly check all the power and ground pins right up front. 

Bob


On Jun 20, 2010, at 9:53 AM, Robert Benward wrote:

> Steve,
> I was looking for insight.  For instance, is there a power up sequence for 
> the +5 & +12V?  Anything I can look at before I dive in to the can?
> 
> This is not the first HP oscillator I have that has gone dead on me.  I have 
> a 10811 that went south on me a few years back.  This is just getting 
> expensive to replace them when they go bad.
> 
> And yes, if there is someone out there that can do it, I would consider 
> sending it out for repair.  I'm an electrical engineer, but I also know my 
> limitations, and although it would grate at me to send it out for repair, it 
> would be the right thing to do (if the price is right)
> 
> Bob
> 
> 
>  ----- Original Message ----- 
>  From: Steve Rooke
>  To: Discussion of precise time and frequency measurement
>  Sent: Sunday, June 20, 2010 1:03 AM
>  Subject: Re: [time-nuts] (no subject)
> 
> 
>  Well, if your not prepared to open it up to fix it yourself, are you
>  looking for someone else to fix it for you (your postings need
>  clarifying)?
> 
>  Steve
> 
>  On 20 June 2010 16:23, Robert Benward <rbenward at verizon.net> wrote:
>> Adrian,
>> I have all this stuff. I really don't want to open this thing up, and my
>> oscillator trouble shooting skills are not that great.
>> 
>> Bob
>> 
>> 
>> ----- Original Message -----
>> From: Adrian
>> To: Discussion of precise time and frequency measurement
>> Sent: Saturday, June 19, 2010 11:10 PM
>> Subject: Re: [time-nuts] (no subject)
>> 
>> 
>> Bob,
>> 
>> guess you know that detailed documentaion is available here:
>> http://www.prc68.com/I/HPE1938.shtml
>> http://www.leapsecond.com/museum/e1938a/
>> Open the can and report back!
>> 
>> Adrian
>> 
>> 
>> Robert Benward schrieb:
>>> All,
>>> Anybody out there know how to fix an E1938 oscillator? Something in 
> the
>>> metal can has crapped out. No 10MHz, and in turn, no processor action.
>> It
>>> worked a few months ago, turn it on today, and worked after about an
>> hour.
>>> Turned it on again this evening and nothing. I would hate to take that
>>> crystal/heater assembly apart.
>>> 
>>> Bob
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>> 
>> 
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> 
> 
>  -- 
>  Steve Rooke - ZL3TUV & G8KVD
>  The only reason for time is so that everything doesn't happen at once.
>  - Einstein
> 
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