[AMPS] Confused about 'circulating currents'

[G0MJW]

>
> I have always used the above formula to determine the proper wire/tubing
> size when designing tank coils. I have never had a coil get hot; so far,
so good!

I have always tried to use the biggest gauge that would fit and hoped it
adequate. Skin effect makes it hard to work out the exact dissipation, and
the Q is governed my many other things, but a good rule is to assume that
the input that does not appear as RF or hot air from the anode is lost in
the tank coil.

I am currently working on an amplifier using the assumption that I am
unlikely to burn out 3/16 inch copper tube with a pair of 4CX250Bs.


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