Re: RE:RF Ground
Posted by
Stuart Rohre on
May 23, 2006; 4:59am
URL: http://elecraft.85.s1.nabble.com/RE-RF-Ground-tp389779p389780.html
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
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