From: "Ken Boorom"
Subject: Re: cheap IR camera?
Date: Fri, 20 Sep 2002 12:45:47 -0700
Organization: Agilent Technologies - Corvallis, OR
NNTP-Posting-Date: Fri, 20 Sep 2002 19:45:59 +0000 (UTC)
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You might try something impregnated with a thermochromic ink. These are
change color when they heat up. They are used in some thermometers, and in
Generra used to make "Hypercolor" shirts impregnated with this stuff. They
were big in the 80's. If you could find one, you could throw the shirt over
the board. But I think they are collector's items now.
Instead, you might try: http://www.imagetherm.com/Prices-LCs.html and maybe
buy a sheet impregnated with thermochromic ink for $25.
Hope that helps,
Opinions expressed in this message are those of the author, and do not
necessarily represent those of Agilent Technologies
George Gonzalez wrote in message <54ji9.145941$Jo.45144@rwcrnsc53>...
>Lately I've been resuscitating a pallet-load of Tek 465 and 475 scopes.
>Some have easy-to-find problems with the power supply-- dried up
>bad bridge rectifiers.
>Most of the rest have shorted tantalum capacitors from one of the power
>supplies (-8, -15, +5, +15) to ground. These are a bit difficult to find,
>as there are many caps sprinkled around the boards. The method I'm using
>now is to push a few amps into the shorted power bus with an external power
>supply, then feel around for warm or hot capacitors.
>This isnt a very good method, as it's hard on the series decoupling chokes,
>wound with like #30 wire, they get a lot warmer than optimum. Also
>depending on the severity of the short, the capacitor can get anything from
>just barely warm, to finger-burning HOT.
>Are there any reasonably priced IR sensors, like a small CCD TV camera?
>Last one I saw was 1000's of $, but that was a couple decades ago.
>Any hints appreciated,