[Elecraft] 80 Meter Verticals

[Edward R Cole]

I did that on my 630m inverted-L.  Obviously 43-feet vertical is very 
short on 495-KHz (less than 10% of a quarter wave), so the antenna is 
heavily base loaded by a coil plus the 122-foot top section adds a 
little capacity.  I ran three wires in parallel spaced a foot apart 
in the vertical section tied together at both ends with 1/2 inch 
copper tube and the top hat is two parallel wires space 2-foot with 
another 1/2 inch copper tube at the far end.  This lowered the Q 
enough to get SWR<2.0 over 5-KHz bandwidth.

I will have to retune to 472-479 KHz when I hang the antenna back up 
after repairs as this is the proposed frequencies for a future ham band.

I operate with 100w (1.3w ERP) under the call sign WD2XSH-45 (ARRL 
sponsored Experimental License).

73, Ed - KL7UW
   http://www.kl7uw.com
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