Re: LF: Re: Screening an LF Loading Coil

[Paul Nicholson <vlf0403@abelian.org>]

Alan wrote:

> I came across Gerald in the 90s

There are at least two other LF list members who also knew
Gerald, including a Chris McCarthy that I remember from AFL
who I think may be G3XVL.   Small world isn't it?

Oops, we've well and truly highjacked Hugh's thread here.

Back to the original question - the barrel presents a giant
shorted turn to the loading coil but that doesn't necessarily
destroy the Q, it depends on how well the coil couples power
to the resistance of the shorted turn.   Coupling to the barrel
would reduce the effective inductance of the coil a little
and you can test for that by measuring L with the coil in and
out.

> the Tx output voltage and current are just the same?

Then it sounds like there's no problem at all.   Lossy coupling
to the barrel would raise the AC resistance of the coil and
tx output current would have dropped.

--
Paul Nicholson
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