I use RG-142 at 1500 watts RTTY on all bands.
And either RG-174 non Teflon; or RG316 Teflon for the input stuff. Either
works just great. I like the Teflon stuff because it doesn't melt while
soldering.
You have to be a bit careful with RG-174.
73
Jim W7RY
-----Original Message-----
From: Larry Benko
Sent: Thursday, June 19, 2014 10:53 AM
To: amps@contesting.com
Subject: Re: [Amps] RG6 Power Handling
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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