In Bill's case he mentioned using 6m yagis with spacings of 40ft or so. There
would be very little, if any mutual effects at spacings this wide. For
example, 39ft long 6m yagis stack at 28 ft spacing with no observable mutual
effects.
The W5AH article did use coax sections and relays which help would make the
phase delay changes more predictable; ie: 12 inches of RG213/U has a length of
27.8 degrees at 50.15 MHz.
The pi-net approach might well be a good way to accomplish the needed phase
adjustment but I wonder what happens to the output R+-j values as it is
adjusted?
73 de k5gw
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