[time-nuts] Power problems on HP5372A

paul swed paulswedb at gmail.com
Wed Dec 29 04:00:29 UTC 2010


Hard to say but if the switch is out take it apart and look.
Very very carefully some times there are little springs that hold the
contacts in place.
Anythings possible lubricant that has frozen up etc.
I hate hacks but sometimes you do not have a choice.
Gud Luc.

On Tue, Dec 28, 2010 at 10:48 PM, Magnus Danielson <
magnus at rubidium.dyndns.org> wrote:

> Hi Paul,
>
> On 12/29/2010 03:04 AM, paul swed wrote:
>
>> Suggest that you disconnect the switch and run 50-100 ma DC through the
>> contacts push on and off a number of times. This should clean them. Low
>> current such as you suggest may not effectively keep them clean over the
>> years. Did wonders on a SRS FS700 I have.
>>
>
> Hmm, will try. However, ohming it does not give much hope.
>
> I now have a replacement switch in place which is kind of a ugly hack, but
> it works. Thanks to thermoglue it also sits stable in the hole where the old
> one used to be.
>
> The trouble is that the switch action requires much more force than I am
> used to. The new switch is distinct but does not require closing in to
> physical violence.
>
> I wonder if not the actual mechanics is broken such that it actually does
> not even get there.
>
> Cheers,
> Magnus
>
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