Not around any appreciable power, no. The losses in the ferrite may
cause it to heat up excessively. Even more so with powdered iron.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_ |/ Principal Engineer
oo\ Sonoran Radio Research
(__)\ _ P.O. Box 25240
\ \ .' `. Tempe, Arizona 85285-5240
\ \ / \
\ '" \ IEEE Senior Member #40274515
. ( ) \
'-| )__| :. \ Email: christrask@earthlink.net
| | | | \ '. http://www.home.earthlink.net/~christrask
c__; c__; '-..'>.__
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----- Original Message -----
From: "Joe Brown" <joe.brown@gordmans.com>
To: <amps@contesting.com>
Sent: Wednesday, February 16, 2005 2:14 PM
Subject: [Amps] slug tuned variable inductors
> Is it possible to use slug tuned coils with any reasonable power? I am
thinking of moving a ferrite slug in and out of a coil to change the
inductance, but don't know if it would be too lossy at real power? Is there
a type of ferrite that could be used for this at HF? Or is this just a goofy
idea. I want to get rid of the roller inductor in my homebrew antenna tuner.
>
> I read an article in an old Ham Radio magazine about a tank circuit for a
commercial 5KW amp, and they lowered the inductance by moving a shorted turn
( a piece of copper pipe) in and out of the tank coil. Wondering if can do
the same thing with ferrite.
>
> 73, Joe W0DB
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> http://lists.contesting.com/mailman/listinfo/amps
>
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