----- Original Message -----
From: "Larry Benko" <xxw0qe@comcast.net>
To: <amps@contesting.com>
Sent: Thursday, June 19, 2014 1:53 PM
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.
** It has been used for decades by many commercial and homebrew amps.
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.
** The OP was asking about a HB amp. Surplus RG-178 is more common than
RG-174 at hamfests and electronics surplus shops. For short runs RG-179 is
often just as easy to find.
Carl
KM1H
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
========================
Visit my hobby homepage!
http://ludens.cl
========================
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4592 / Virus Database: 3972/7706 - Release Date:
06/19/14
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4592 / Virus Database: 3972/7706 - Release Date: 06/19/14
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|