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Rewinding a rheostat to make it a variable iunductor
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September 18th 06, 02:37 AM posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Sep 2006
Posts: 44
Rewinding a rheostat to make it a variable iunductor
wrote:
On 17 Sep 2006 04:58:06 -0700,
wrote:
I came up with this idea to make a tiny antenna tuner. Thought maybe I
could remove the wire on a rheostat and rewind it with copper wire so I
can make a long wire antenna tuner .
Dennis W6EH
Check a back issues of QST. Someone did it (miracal antenna)
in a construction article.
They wrapped a ferrite toroid (large one) and use the wiper and
bearing from a Wire wound rheostat to select taps on it. I tried it
for a very small Pi tuner and it was decent.
Allison
ARRL members can download the article @
http://www.arrl.org/members-only/tis...df/0107032.pdf
This ideas was commercialized by the author and is now sold as the
Miracle Whip
See
http://www.miracleantenna.com/
for details
Roger
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