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-   -   Variable capacitor question (https://www.radiobanter.com/shortwave/38609-variable-capacitor-question.html)

Tony Meloche October 12th 03 06:43 PM

Variable capacitor question
 
In my scrap parts box, I ran across a good-sized two-gang variable
capacitor that I hadn't seen in years. It has a lug off of each gang.
I was wondering if I could convert this to a simple antenna tuner in
some way. If it would work, should I tap into (and out of) both lugs or
just one? Any replies appreciated!

Tony


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Bill Hennessy October 12th 03 07:30 PM

The value might be to high. 50 picoF is the highest i've seen. Most are
under 20 picoF. Unless your planing to use a tank with an inductor with it.

I have seen high values on loop antennas but, a loop is a inductor.



Henry Kolesnik October 13th 03 09:34 PM

Try one section first and if that's not enough capacity tyr paralelling the
2 sections.
"Tony Meloche" wrote in message
...
In my scrap parts box, I ran across a good-sized two-gang variable
capacitor that I hadn't seen in years. It has a lug off of each gang.
I was wondering if I could convert this to a simple antenna tuner in
some way. If it would work, should I tap into (and out of) both lugs or
just one? Any replies appreciated!

Tony


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News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000

Newsgroups
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GrtPmpkin32 October 13th 03 10:49 PM

In my scrap parts box, I ran across a good-sized two-gang variable
capacitor that I hadn't seen in years. It has a lug off of each gang.
I was wondering if I could convert this to a simple antenna tuner in
some way.


There are a LOT of informative sites regarding antenna tuner projects and
experimentation, and a search on those topics alone should hit more than you
can read in an evening... as for using both sections or just one, it depends on
a few factors, which have mostly to do with the frequency range desired, and
the size and type of antenna you're wanting to tune with the capacitor. Again,
a search for antenna tuning projects and tips should garner you a hefty amount
of info. You'll love it!
Have fun-
Linus


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