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Old July 22nd 03, 09:10 PM
Dave Shrader
 
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Cecil, you are sharp!!

DD

W5DXP wrote:

Yuri Blanarovich wrote:

Oh Yuri!! All resistors in any circuit radiate EM energy!



...and cause SWR. Can you picture little, unmatched radiating resistor
in the
circuit? Live and learn eh? I thought they ate the RF without passing
any to our precious environment.



They do eat RF without passing more than a negligible amount to our
environment. But they also convert the energy from RF energy to radiated
heat which is just as much of an EM wave as the RF wave was. The old
RF wave is destroyed but since the energy in that RF wave cannot be
destroyed, it must be converted. In this case it is converted to
an infrared wavelength.

The way to keep a resistor from radiating heat is to enclose it in
a heat sink in which case the heat sink probably radiates heat as
well as conducts heat.