[time-nuts] HP E3610A Power supply

[paul swed]

Bert just finding out that google mail is treating your emails as spam!
Not sure if the message appears but as you can see it questions who you are.
I found numbers of missing emails a few minutes ago.
Regards
Paul
WB8TSL


On Thu, May 22, 2014 at 7:59 AM, <EWKehren at aol.com> wrote:

> This may be off topic but I did check with Tom and many time nuts may have
> HP E3610A power supplies on their bench and mine smoked a ublox GPS so that
>  makes it topic related..
> The reference section has some 1 uF 50V capacitors and in my unit one
> shorted. The reference section has fuses on the board but they did not
> open. The
>  7912 overheated and shorted out,  traces are discolored the op amp  shows
> signs of overheating and burned out. The result was the output went  to
> 30V+
>  and next morning the ublox chip plastic showed where the chip  smoked. As
> a minimum I recommend replacing the 1 uF capacitors with new quality  caps,
> I also ordered 15 V 5 W zeners and 0.5 A 20 mm glass fuses.
> Bert Kehren
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