Topband: 1000 feet 5/8" hardline or 600ohm True Ladder line.

[k1fz]

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 at gmail.com>
 To: "topband" <topband at 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
 _________________
 Topband Reflector Archives - http://www.contesting.com/_topband


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