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Old April 22nd 06, 11:00 PM posted to rec.radio.shortwave,rec.radio.amateur.antenna
Irv Finkleman
 
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Default question about tunable capacitor: how to mount ??

switcher wrote:

In article , Irv Finkleman
wrote:

With a one meter loop, a capacitor with a value of 100 pf
or less should beable to tune between about 7 and 30 mhz.


A 80 cm loop gives me reception between about 5 and 12 Mhz, this is with
a cap from a FM/AM radio kit ...
http://users.fulladsl.be/spb13810/oc/IMAG0018.JPG

So, to have higher freq, the loop should be made smaller ... (or higher
cap ?..)


Make the cap smaller. You can if you put a similar cap in series with
the first you will reduce the total capacity and raise the resonant frequency.
Changing loop length is too much trouble, changing a cap is easy.

Irv VE6BP
--
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Irv Finkleman,
Grampa/Ex-Navy/Old Fart/Ham Radio VE6BP
Calgary, Alberta, Canada