[time-nuts] PRS10 Rubidium

paul swed paulswedb at gmail.com
Sun Feb 22 15:46:44 EST 2015


I will speculate the only thing that can release something that would
carrode like that is the tantalum cap on the right. The resistor thats
standing up is simply on some form of insulated standoff?
Regards
Paul
WB8TSL

On Sun, Feb 22, 2015 at 10:44 AM, Jürg Kögel <j.koegel5 at gmail.com> wrote:

> Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years
> ago. Both have been working for the last nine years. One did fail last year
> and I finally got around to looking at it in the last two weeks. The
> attached picture shows the trauma to the lamp board. I do not understand
> the corrosion since it has been in a very controlled environment in my
> basement.
>
> Since the failed unit does have the 1 pps loop control I moved the
> processor board to the still working unit. Did not work. Does it take more
> than just moving that one board to get 1 pps loop control?
>
> Second any ideas as to what may have happened to the lamp heater board. Any
> recommendations? Plan on making a replacement board. Have a power FET
> MRF134
>
> Thanks
>
>
>
>  Juerg
>
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