[Elecraft] High Current only on 20 Meters

Jim Brown jim at audiosystemsgroup.com
Wed Mar 4 23:31:57 EST 2020


On 3/4/2020 8:15 PM, Adrian wrote:
> When I say radiation resistance I include the small copper resistance also, which is negligible on this heavy copper wire delta loop.

An important part of my post was about using the right words to describe 
physical reality. Radiation resistance is a characteristic of an 
antenna, and can be used to compute antenna efficiency. That's NOT what 
you're measuring. You are measuring feedpoint impedance (assuming you 
can connect at the feedpoint AND that your measurement setup doesn't 
change the impedance).

So please call it what it is -- the feedpoint impedance, which your 
analzyer probably reports as Rs + j Xs). :)

73, Jim K9YC




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