[NLRS] Favorite horizontal loop design?

[Glen Overby]

Paul Beckmann wrote:
> I'd like to make up a stack of 3 horizontal loops for 6, 2, and .7
> meters and am wondering what tried-and-true designs the NLRS crew
> might recommend. I'm especially interested in matching section
> designed used. I'd also like any advice on spacing that will keep me
> out of trouble. I'll likely build all of them out of copper
> pipe/tubing for fixed outdoor use. Not anything for great performance,
> just to have weak signal capability from the home QTH.

I built the copper loops for 144, 222, 432 that were described in QST:	

144: December 2002 QST pp 46-48 By W9SR 
          Jan 2003 QST (Correspondence) 
          Feb 2003 QST (Feedback)       
          Improvements to the 2 Meter CU Loop: Oct 2004 QST pp 66 

222 & 432: July 2004 QST pp 58-62

This design uses a gamma match.  I built my 2m loops (squares) the same way
the 222 & 432 were designed.  The 3rd article describes stacking the loops (as
I recall) 5/8 wavelength apart and phasing them with equal lengths of 75 ohm
coax and a T connector.  I know this is only a 2-antenna stack not the 3
you're looking for.

When stacked, my 222 loops apparently have some phasing difference that causes
them to point somewhere other than horizontal (they seem to hear when set up
one way, but not the other).  Otherwise, they seem to operate well.

Glen, kc0iyt