Re(2): [Antennas] efficient antenna tuning

[DavidE Benedict]

Over the years I have seen schemes published in magazines for switching a
cap in or out, or selecting one of two taps on an inductor, for "antenna
tuning". 

A person can use certain types of relays for this and maintain lo-loss.  

Can even run the DC coil volts for the relay up the coax in a lo-loss
fashion!

So, if you are a tinkerer this may be the way to go.

Another way to go is to increase the diameter of the lower vertical member
of the BugCatcher slightly, for, increasing the diameter will increase
bandwidth, but it will be at the expense of a bit lower Q and result in a
subsequent small drop in antenna efficiency.

You might also ask questions at internet sites like:

http://www.discovercircuits.com/

http://members.shaw.ca/novotill/index.htm

http://www.circuitsage.com/

David B.
W7DBH
ka5oai at jass-ltd.org,Internet writes:
>More info:
>Ground system consists of 16 radials 13 foot long.
>Antenna sits on a flat tar and gravel roof up 20 feet.
>I'm on 1st floor of 2 story apartment building.
>2nd floor has 10 foot of metal siding,
>so balanced line does not seem like an option.
>Fixed income does not allow for remote ATU's
>
>in fact, a read on the loses in ATU's, is what instigated this question.
>-- 
>GB & 73's
>KA5OAI
>Sam Morgan
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