[Elecraft] Counterpoises for KAT100

[Gil Stacy]

I’d like to pigtail counterpoises for 10, 30, 80 and 160 meters for my 
200+/- wire which is configured as an endfed inverted U up about 65-70’.  
The horizontal run is about 90’; the down-turned end is about 50’ long, and 
stops about 15’ from earth.  The horizontal run is across a steel-shingled 
roof with a ridgeline up about 26’ from earth. (If the 50' downturn is 
counterproductive, I could eliminate it, but the antenna doubles on my dx 
xtal radio set and seems to work better with this ant.)

For the ¼ wave counterpoises,  I’d like to feed them to my KAT100 with a 
single wire 6’ long.  I would prefer to join the longer c.p.’s to this 
single wire outside the window.  Is this practical?  I assume I would 
subtract the 6’ from the calculated ¼ wavelength of each band and attach 
wires of respective lengths to the 6’ wire.  I’ll probably pigtail the 10 
meter c.p. closer to the KAT100 inside the shack and keep it along the 
floorboard.

C.P. height:  Resources indicate a preferred height of 6-8’ above ground.  
Is this a minimum or could I lay the 80 and 160 meter c.p.’s on top of my 
roof?  I will not be able to lay out the 160 meter c.p. in a straight line 
in any event.

Tnx es 73, Gil NN4CW