[time-nuts] Ancient OCXO in scope calibrator.
rexa at sonic.net
Mon Sep 8 15:55:51 EDT 2008
> Brooke Clarke wrote:
>> Hi Dave:
>> Do you have a photo?
>> It's been my experience that older electronic equipment fails because of poor
>> connections rather than bad components. For many examples see:
>> Have Fun,
>> Brooke Clarke
> A little off topic from the original thread, but on your referenced
> page, in the "Dead CRT Computer Monitor" section, the blown device is
> probably a TVS (Transient Voltage Suppressor). My first thought was that
> it was a MOV (Metal Oxide Varistor) but the symbol was different. With a
> bit of Google, I found this page:
> (Wow! What a URL. Good chance it will wrap in the email. If you can't
> copy that, it is page 122 in the google online book "Embedded Systems
> Design Using the Rabbit 3000 Microprocessor". Seems like a pretty good
> description of voltage suppressors if you scroll back and forth a few
> So I just thought I'd try to help with the device, as your page still
> has it as an open question. Still unknown is the voltage rating and what
> caused it to blow. Since you mention it was on the AC mains, there is a
> good chance it was just doing what it was supposed to do, and the
> voltage should be something a bit greater than the AC input voltage.
Dang! Glancing again at the page just after I sent, the symbol IS an
alternative form for a MOV, not a TVS. All the rest still applies.
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