[Elecraft] K2 Glitch on Field Day

[David Woolley]

Andrey Stoev wrote:
> In the same 
> Physics 101 class they teach that black painted objects radiate heat 
> better - one reason why the anode of a  tube and also heatsinks are black.

Sort of true, but is "blackness" at near infrared, for the valve, and 
far infrared, for heat sinks (also near infrared for solar heat 
absorption).  Theoretically, one could have an object that was a very
efficient radiator but was optically white.

I think it is generally black pigments, that are broadband black.  Black 
dyes may well be transparent at infrared.


-- 
David Woolley
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