[Elecraft] KAT-500 and 30' Flag Pole Antenna Users?

Edward R Cole kl7uw at acsalaska.net
Mon Jul 29 17:01:40 EDT 2013


Kind of OT, but:

One can use RG-8 coax with shield and outside covering removed (just 
using the center wire and internal insulation to connect a tuner to 
vertical antenna.

I use such as my HV jumper from the base coil of my 500-KHz 
inverted-L to the "top" of the coil (10-inch diameter 11-inch long 
wound with solid 12ga. copper wire):
http://www.kl7uw.com/Coil005_1.jpg

I don't use a tuner at the base coil, at present.  I tap the "bottom" 
of the coil 2-1/2 turns up and connect that to my RG-213 cable.  The 
bottom of the coil is tied to a ground post and four very wide but 
short radials (1/4 WL = 930-feet so both antenna and radials are 
"short - very short").  The vertical section consists of three 
parallel wires 43-foot high, spaced a foot apart, and the top hat is 
two parallel wires 122 foot long spaced 2-feet.  Z = 0.81 - 
j681.5.  Efficiency is 0.8 %.  100w RF output results in ERP = 4.15w.

Some day I will attempt use of the antenna on 80 & 160m.

Oh the radials are novel:  50 to 70-foot long 2-foot wide chicken 
wire fencing laid on top of the lawn.
for more info on what we are doing on the 630m band:
http://www.kl7uw.com/600m.htm

73, Ed - KL7UW
http://www.kl7uw.com
dubususa at gmail.com
"Kits made by KL7UW" 



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