Counterpoises for KAT100

Posted by Gil Stacy on Nov 02, 2005; 4:56pm
URL: http://elecraft.85.s1.nabble.com/Counterpoises-for-KAT100-tp383349.html

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


_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com