[time-nuts] wwvb weak on east coast especially when the pre-amps under wa...
Hal Murray
hmurray at megapathdsl.net
Tue May 15 02:39:28 UTC 2012
K3WRY at aol.com said:
> If you can keep the boards in a vertical mount position, and they have been
> sprayed with a conformal coating, the heat from the components and the
> coating will keep any moisture from forming on the boards in a vertical
> position. We do this in several products we supply to the military.
Does this help significantly for an antenna preamp that doesn't dissipate
much power?
How much power does a board have to dissipate to keep dry? I assume it
depends upon the size of the board, but I doubt if it's linear.
What's magic about vertical for keeping dry? I'd expect a vertical board to
have better air flow and hence better cooling, but does that keep it dryer?
--
These are my opinions. I hate spam.
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