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Re: [Amps] Silicone hose from Flex Technologies

To: amp reflector <amps@contesting.com>
Subject: Re: [Amps] Silicone hose from Flex Technologies
From: Jim Hoge <knowkode@verizon.net>
Reply-to: Jim Hoge <knowkode@verizon.net>
Date: Fri, 20 Jul 2012 10:43:53 -0700 (PDT)
List-post: <amps@contesting.com">mailto:amps@contesting.com>
The purpose of a chimney is not to absorb RF radiation but to direct airflow. 
The only specification that really matters is whether or not it will survive 
the ambient temperature of its environment. It does not need to be a thermal 
insulator. (Think glass chimneys fore 3-500 tubes.) I think a conventional oven 
would be a better instrument with which to test the temperature survivability 
of any given chimney material.

73,
Jim W5QM



________________________________
 From: Paul  Hewitt <wd7s@earthlink.net>
To: Amps Reflector <amps@contesting.com> 
Sent: Friday, July 20, 2012 12:19 PM
Subject: [Amps] Silicone hose from Flex Technologies
 
Greetings
A few months ago someone posted the link for this company after using some 
of their silicone hose for a chimney(s).  I bought some of the 2.5 inch hose 
for a pair of 3cx800's I have.  It is a polyester reinforced product. 
Unfortunately the hose did not survive the microwave test I gave it.  Two 
minutes in a 1KW microwave gets it so hot you can't touch it for ten 
minutes.  It might be OK for HF but above that I would be cautious.  For 
what it's worth before you spend the money.

Paul


PAUL HEWITT
WD7S PRODUCTIONS
QRO HOMEBREW COMPONENTS
http://home.earthlink.net/~wd7s




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