"Cecil Moore" wrote in message
.. .
Owen Duffy wrote:
On Thu, 3 Aug 2006 03:37:05 +0100, "Reg Edwards"
wrote:

I must admit, rules of thumb are quite adequate for coaxial chokes.
Almost anything will work. Very often things will work quite well
without a choke at all. ;o)

But the Rule Of Thumb to avoid (presumably) parallel resonance of the
choke for the reasons given is ROT.

Wouldn't the resonant circulating currents be at their
highest magnitudes at the parallel resonant point and
therefore the I^2*R losses in the coil be greater at
that frequency than on either side of self-resonance?
(I explained that avoiding self resonance is only a
personal preference.)
--
73, Cecil http://www.qsl.net/w5dxp

Hi Cecil

Doesnt the increase of impedance of the parallel resonant "balun"
discourage current from flowing into it? I considered that the source
impedance is constant and the "balun" impedance rises as resonance is
approached.
I figured the circulating current would be Q times the current thru it,
but the current thru it drops as its impedance rises.

If I'm wrong, I've been lucky so far.

Jerry