[Amps] Silicone hose from Flex Technologies

[Jim Hoge]

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 at earthlink.net>
To: Amps Reflector <amps at 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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