[mythtv-users] HDHR in harsh enviroments

Gordon McLellan gordonthree at gmail.com
Sat Dec 27 05:55:42 UTC 2008

If someone were to disassemble it and get some pictures, we can look
at what makes it tick and get a better idea of the temperatures it'll
work at.

Most of your semiconductors are good to at least 85C (over 180F), that
would be chips, transistors, diodes, etc.  The exception of course is
complex chips like CPUs, and LEDs which both require kidd gloves.  If
the CPU is passively cooled at room temp (just a heatsink or maybe
nothing), addition of a forced-air or larger heatsink will help there.
 For leds, not much you can do there, just accept reduced lifespan.

Then you have passive components like electrolytic capacitors, which
might only be rated for a working temp of 50-75C, after which their
electrolyte boils and makes quite a mess.  Conversely the electrolyte
can freeze, which might rupture the cap, but more than likely will put
it out of spec in terms of its capacitance.

Just my 5 cents!


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