"Reg Edwards" wrote in message
news
Sal,

A capacitance hat allows you to drive your car into the garage without
breaking off a whip of 15 feet equivalent height.

A capacitance hat loads a short vertical without suffering the loss in
a loading coil.

To calculate capacitance of a hat, above an antenna of given height,
with N spokes of given length, surrounded by a halo, plus resonant
frequency, download program TOPHAT from website below.

The program also calculates L and C values of the tuner. The whole
job can be done in a couple of minutes.

That's outstanding! I see the original antenna was only about 15% efficient
and the capacitance hat improved it by about 2 dB. I will play with that
program. Thanks.

"Sal"
(really KD6VKW)