[Antennas] Coax lengths?

Tue Nov 21 19:39:31 EST 2006

Hi All,
A short time ago I asked a question about the best Aluminum "no-Ox" grease 
to use when the antennas go back up (in about a week when the house siding 
is finished). Thanks for the information I received about it.
Anyway, I have another question for Y'all. Specifics are. . .
Antenna in question: Roof mounted (Sheet-metal roof) Butternut HF-2V 
vertical for 75/40M. Coax run was about 35 feet of RG-213/U directly to the 
antenna select switch, no Balun or "Coax choke". The antenna covered most 
of the 40M band with no tuner, but only about 100KCS or slightly less on 75 
with no tuner.
I've decided to use the original 35 feet of RG-213 (Spade lugs on one end, 
PL-259 on the other) and wind it into a coil (Coax choke?) about 10 inches 
in diameter with "pigtails" and place it at the base of the HF-2V. Then use 
an additional 31 feet of RG-213 with PL-259's on either end to reach the 
coax switch. The two pieces will be spliced with a "barrel connector" and 
well weather proofed with coax seal tape.
Question. Does anyone here see a problem with what amounts to roughly a 66 
foot length of coax for either 75 or 40M? I'm not so concerned about the 
areas where the antenna is near resonance as the SWR would be low. But 
rather, those areas where a tuner is needed. Power from the transmitter is 
at present only about a hundred Watts.
73 de Phil, KO6BB
DX begins at the noise floor!
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