[Antennas] 80 meter delta loop

Tue, 6 Apr 2004 13:09:30 -0400

Ed;
Full wave loops may be fed two ways: via a tuner and 450 or 600 ohm line 
or
the most common way is via a one quarter (1/4w) wave 75 ohm coax
transformer. 
Use the Formula of 246/f(MHz)x VF
RG-11A is 66% VF, while RG-11 Foam is 78% VF nominal.
I used RG-59U years ago on my 80M loop, since power was limited to
400-500 watts at the time. Now with 1500 watts, RG-11 is a 
M-u-s-t !
GL/73,
Jim Miller, K4SQR
www.comteksystems.com
4-Square, 2-High tri-band,
3-High Monoband Stack Systems
Our 15th year of 4-Square Systems
On Mon, 5 Apr 2004 23:27:31 -0400 "w4tey" <[email protected]> writes:
> I'm thinking about putting up an 80 meter delta loop. The dimensions 
> I'm getting are right at 258 feet for the radiator. Would a 4:1 
> balun be of any benefit? It will have to be fairly low 25 to 30 feet 
> at the supports and maybe a little higher at the feedpoint and 
> horizontally polarized. Any suggestions or ideas? 
> Ed W4TEY
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Jim Miller, K4SQR
www.comteksystems.com
4-Square, 2-High tri-band,
3-High Monoband Stack Systems
Our 15th year of 4-Square Systems