It seems to me that it's a lot easier, from a mechanical standpoint, to use
a simple gamma feed (without a capacitor) at the bottom of the loop. This is
a one band antenna, so finding an optimum match should not be that
difficult. If I feed the loop at the bottom with a gamma match, then
symmetry requires the capacitor to be at the top of the loop.

However, if using a second one-fifth sized loop as the feed loop allows me
to mount the capacitor at the bottom, then this type of design might become
attractive. It is not clear to me how easy it would be to keep the relative
positions of the two loops fixed.

"Richard Clark" wrote in message
...
On Wed, 16 Nov 2005 19:33:51 GMT, "John.Gotwals"
wrote:
resonated by a variable capacitor in series with the top pipe section.

Hi John,

The bottom would seem to be far more accessible and you should loop
feed the entire antenna (a loop inside the loop, that is) - Reg has
many times pointed out this matter of simplicity solves many
headaches.

73's
Richard Clark, KB7QHC