Topband: Quarter wave sloper ?

[Rick Kunath]

Jim, I forgot to mention that 90 or 100 feet is plenty of separation for 
a phased flag array made of two un-terminated flags mounted vertically

I made a cheap water drill to mount mine and PVC pipe goes into the 
ground like butter and cements tight almost immediately. I droverr a 1 
1/2 x 10-foot PVC pipe 5-feet into the ground and then a couopling and 
another 10-foot section on top. That's enough to get the bottom wire of 
the flag at about 4 feet from the ground and it works well. But as a 
note, paint the top pipe black before you put it up to make it disappear 
from view. White shows up pretty well. Black doesn't.//The bottom part 
and the coupling is easy enough to reach to paint from the ground. /
/
If you wanted to you could terminate the bottom corner opposite the 
feedpoint, either adjusting that and then making up a fixed resistor 
pack or using a VACTROL to make it remote adjustable, but I find my 
ability to move the null where I want it is great without the 
termination and loss of bi-directionality and the additional 30 dB loss 
with termination so you need a preamp at each loop. Unterminated you 
don't need the preamp./
/
Rick Kunath, K9AO