[time-nuts] Fw: HP 105 powersupply problems
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Apr 4 01:27:53 EDT 2006
In message <002901c6578c$9d928120$0e8fae43 at hsd1.in.comcast.net>, "Richard and M
arcia Putz" writes:
>I had similar problems with my HP105, not bad transistors, check
>out the filter capacitors. Electrolytics in any equipment past 15-20
>years of age could be suspect. I'd look there first.
In general when powering up equipment that has been turned of for
years: Use a variac and ram the voltage up slowly over a couple of
days.
Electrolytics can loose their polarisation over time and if exposed
to full voltage they are likely to splatter all over the place, but
if you give them a slow start they will most often recover their
polarisation and work fine.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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