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
[email protected]
"Kits made by KL7UW"
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