[time-nuts] Solartron 7150plus DMM Failure
Philip Pemberton
lists at philpem.me.uk
Mon Sep 21 20:53:02 UTC 2009
GandalfG8 at aol.com wrote:
> I have now had two identical failures of Schaffner filtered mains sockets
> on ex-mil 7150plus DMMs, although I'm not suggesting the ex-mil source is
> particularly relevant.
> In both cases there has been an internal component failure within the mains
> socket that caused it to emit smoke around the edges of the metal filter
> cover, accompanied by a brown goo and a very unpleasant smell.
Interesting. There's what, nearly half a dozen reported failures now?
- 2 of yours
- 1 of mine
- and someone else who emailed me the other day about possible
alternatives to the Schaffner filter unit
It is, in all likelihood the X2-rated mains filter cap that's blowing --
I've seen a similar fault on BBC Micros when the X2 caps fail in those,
which causes the same brown smoke emission. In those, however, the smoke
doesn't usually condense and stick...
I suspect if I ever get another 7150+, I'll be swapping the line filter
on the instrument's arrival...
--
Phil.
lists at philpem.me.uk
http://www.philpem.me.uk/
More information about the Time-nuts_lists.febo.com
mailing list