Heating is not a good guide for long coax runs. One watt of heating, in one
foot of length, would hardly be detectable. Multiply times 1000 feet and a
kilowatt of power is lost.
The same logic not to use small diameter house wiring applies, The amount
of current through the wire needs to be considered.
73
Bruce-K1FZ
www.qsl.net/k1fz/beveragenotes.html
----- Original Message -----
From: "Mike Waters" <mikewate@gmail.com>
To: "topband" <topband@contesting.com>
Sent: Saturday, April 26, 2014 9:17 PM
Subject: Re: Topband: 1000 feet 5/8" hardline or 600ohm True Ladder line.
Hardline for 160 meters?
I've mostly used hardline where I really needed it, like back when I was
doing weak signal work on the low end of 144 MHz.
Is 75 ohm CATV-type RG-6 (F-6) coax available where you live? That's what
I use on 160m to feed my inverted-L that is quite a distance from the
operating position. I buy Commscope quad-shield flooded (buryable) F-6
with CCS conductor and a bonded inner shield in 1000' spools off eBay. I
even
use F connectors at 1500 watts (as do other hams). Neither the coax nor
the F connectors get the least bit warm, even after several minutes of
key-down at 1500 watts.
The loss of RG-6 is about the same as RG-213. And it will handle over 3000
watts all day long in the hot sun.
73, Mike
www.w0btu.com
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