Re: [Amps] RG6 Power Handling

[Larry Benko <xxw0qe@comcast.net>]

Hmmmmm!  Re-reading the original post I made an assumption that may or 
may not be correct.  I assumed the coax was to be used at the output 
side where it would be subject to the full amplifier power. If that is 
the case, then RG-142 or RG-400 would be about the only choices for 
small diameter high power coax.
However on the input side of the amp RG-142 would be a poor choice for 
reasons of flexibility and cost.  For low power RG-174 (PE) (200W avg. @ 
30MHz) or RG-316 (Teflon) (1.1kW avg @ 30MHz) would be better.  Last 
time I checked, RG-178 was more expensive than RG-316 even though it is 
smaller.  I can't find power ratings for RG-178 but would guess it would 
easily handle a couple hundred watts average since it is the same 
construction as RG-316.
73,
Larry, W0QE


On 6/19/2014 11:34 AM, Carl wrote:
> Not very flexible.
>
> Low power circuits can use RG-174 or 178.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Larry Benko" <xxw0qe@comcast.net>
> To: <amps@contesting.com>
> Sent: Thursday, June 19, 2014 12:32 PM
> Subject: Re: [Amps] RG6 Power Handling
>
>
> > RG-142 (50 ohm)
> >
> > Same size as RG-58 and rated at 30MHz 1:1 SWR of 3.1KW average power
> >
> > Larry, W0QE
> >
> > On 6/19/2014 10:22 AM, Manfred Mornhinweg wrote:
> > > Hi all,
> > >
> > > what 50Ω coax cable would be recommended for the internal wiring of 
> > > a compact 160-10m legal limit amplifier? I'm looking for a cable 
> > > thinner than RG-8, much more flexible, non-foam (to avoid 
> > > de-centering in bends), and that can be purchased easily in small 
> > > quantities. Of course, it must handle the power, even with a 
> > > slightly elevated SWR, without overheating.
> > > Suggestions are welcome!
> > >
> > > Manfred
> > >
> > >
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