[Amps] QRO Questions

[Carl]

Gore makes a series of foamed PTFE that is very flexible. Not cheap of 
course but a friend is the NE Sales Manager (-;   I use it around the rotors 
for 222 (1500W) to 1296. On 2M Im using CATV RG-11 foam quad shield at 
1500W. On the higher bands I convert to 50 Ohms before the loop.

Carl
KM1H


----- Original Message ----- 
From: "Larry Benko" <xxw0qe at comcast.net>
To: "amps" <amps at contesting.com>
Sent: Saturday, February 06, 2010 11:38 AM
Subject: Re: [Amps] QRO Questions


> You are referring to RG-142 which can carry over 3KW on 10m.  It is
> teflon and lower loss than RG-58 but it does NOT have less loss than
> RG-214.  It gets its power handling capability by being able to operate
> at high temperature.  Also it is not very flexible since the center
> conductor is a single silver plated copperweld wire.   See
> http://www.timesmicrowave.com/cgi-bin/calculate.pl for a nice coaxial
> cable loss/power calculator.
>
> Larry, W0QE
>
> Ron Youvan wrote:
>>> There was a PTFE coax about the size of RG213 that I saw in Germany (at 
>>> Friedrichshafen maybe?) some time ago, but I can't remember what it's 
>>> called and have never seen it since.  Anyone know of this stuff?
>>>
>>
>>    There is a PTFE coax about the size of RG-58 with less loss and more 
>> power handling
>> capacity than RG214 so what you mention is a lot more than probable.  (as 
>> is 1/4"
>> superflex)  I like the Times LMR products, while not as efficient as 
>> above, many are "direct
>> burnable."  (polyethylene jacket)
>>
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