If the center conductor and shield are shorted at the rig, ONLY the shield has any effect, and velocity factor does not enter into the action of this type of counterpoise.
There is another type using coax, where a capacitor shorts the shield and braid for RF purposes, (0.001 mf ceramic disc cap) at the far quarter wave away end. However with that implementation, I would predict not velocity factor, but the effect of shield to center capacitance or the bigger diameter of the shield to affect the length needed for quarter wave equivalent. Stuart K5KVH _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
