wrote:
On Oct 2, 2:06 pm, "Jimmie D" wrote:


The small theroretical gain advantage that a 5/8wl radiator has over a 1/2wl
radiator is dependent on it having a very good counterpoise. However one
may be able to fabricate a 5/8wl antenna with a couterpoise matched to the
feedline with a stub made of metal tubing.

Jimmie
The best "counterpoise" for a 5/8 radiator is a set of 5/8 radials...
But in that case, it's more of a collinear.
Myself, I think a 5/8 radiator should always be used with a 5/8
lower section of you want the full performance. IE: dual 5/8
collinear.
Anything else is a perversion... :/
My 2nd choice would be to use 3/4 wave radials.
1/2 wave radials would be useless.
1/4 wave radials are semi useless, and give a lousy pattern..
MK

I like the 5/8th on VHF because it has noticably more gain than a
1/4wl groundplane and in my opinon is easier to build and match than
an end-fed 1/2wl antenna.

Jimmie