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Old September 6th 04, 03:52 PM
Dale Parfitt
 
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"Theplanters95" wrote in message
...
Have you tried an halo or loop antenna? M2 Antenna's and Par Electronics

makes
them. Homebrew plans are on the net.

The halo is a 1/2 wave dipole bent into a circle. Common designs use 1

turn,
but 3 turn halo's have been used, with more gain. Stacking 2 halo's also
provide additional gain. Weak signal operaters on VHF and UHF use them

mobile
on a regular basis.

Randy ka4nma


Two points of clarification. The PAR design is not a half wave antenna. It
is longer than a half wave- that length combined with the isosceles triangle
shape yields an excellent omni pattern and a bit more BW

The 3 loop haloes were not 3 turns. The loops were configured as a folded
dipole in order to increase the inherently low feedpoint R (10-15 Ohms) of a
single loop. There is no increase in gain from doing this.

Dale W4OP


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Old September 9th 04, 06:22 AM
Theplanters95
 
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Hi Dale,

Are you saying that the old saturn halo was not 3 loops? It sure looks like it
in the pictures that I have seen.

I know that your design (the Par Omniangle) is not the classic 1/2 wave halo,
and does offer more advantages over a halo. I sure wish I had a 2m and 6m for
the upcoming VHF contest.

Randy ka4nma
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