[time-nuts] hp 5372A Parts available

paul swed paulswedb at gmail.com
Mon Mar 21 13:07:17 UTC 2011


I would be interested in any cpu/eproms. Not sure of your location.
My goal will be to copy the eproms and share back to the group and put on
some website for others.
After I am done someone else can have the memory/cpu board.
Hate to loose that type of information.
Regards
Paul
W8TSL

On Mon, Mar 21, 2011 at 12:38 AM, J. L. Trantham <jltran at att.net> wrote:

> Eric,
>
> My 5372A fails Test 4, 'Input Amplifiers', with 'Input Bias Failure',
> 'Input
> Bias Test 6: MAX: 2172 (Min: 2172) [2191 2235]', and Test 6, 'Count ICs',
> with 'Count ICs Failed A3U37 and A3U42' and 'A3 U37, U42 chain FAILED --bad
> count [4.1902 mS gate] : 0029517C [001FF7FC]'.
>
> I am not sure what all that means but it would appear that the problem is
> on
> the A5, A4, or A3 board.  Since Channel A is dead and Channel B works, A5
> may be the culprit
>
> I would like to hear what boards you have to offer.
>
> Thanks,
>
> Joe
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of J. L. Trantham
> Sent: Sunday, March 20, 2011 8:34 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] hp 5372A Parts available
>
> Eric,
>
> I have a 5372A that has a problem on one of the input channels.  I
> mistakenly unplugged the input pod and reinserted it with the power on.
> Since then, that channel does not work.  I can't remember the specific
> failed test right now but I will investigate.  The pod still works, the
> problem stays with the channel.  I think I need to repair one of the
> boards.
>
> Where are you located?
>
> Joe
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Eric Haskell
> Sent: Sunday, March 20, 2011 1:42 AM
> To: time-nuts at febo.com
> Subject: [time-nuts] hp 5372A Parts available
>
> I just scrap out a 5372a.  The unit was working but reporting a histogram
> error.  I am keeping a few parts, the rest is available.  Let me know if
> you
> need anything.
>
> Eric Haskell
>
>
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