top loading vertical antenna?
 

I have a 48 ft vertical that I wish to shorten 10 feet, and use top loading.
Whats a good rule of thumb....use 3 drooping top loading wires each 10 feet
long? thanks...

On Thu, 6 Oct 2005 10:00:01 -0700, "Denton"
wrote:
I have a 48 ft vertical that I wish to shorten 10 feet, and use top loading.
Whats a good rule of thumb....use 3 drooping top loading wires each 10 feet
long? thanks...

Hi Denton,

One rule of thumb I've seen is that the radius of the top hat is equal
to twice the height it replaces.

Of course this probably varies considerably with the number of spokes
and the proportion of the actual height to the equivalent height. What
gives me pause to wonder is that if you can support 3 drooping hat
wires, why can't you keep one going straight up? You already have a
48 footer, why do you want a 38 footer with a hat? To give it the
appearance of being 58 feet? Why not a 48 footer with 5 foot top hat?

73's
Richard Clark, KB7QHC