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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 14:08:38 -0700 (PDT)
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Point taken. With the exception of a chimney pulling double duty as an anode 
resonator such as in K5GW's 432 amp, the chimney material shouldn't be 
conductive or rf absorbant.


________________________________
 From: Paul  Hewitt <wd7s@earthlink.net>
To: Jim Hoge <knowkode@verizon.net> 
Sent: Friday, July 20, 2012 3:19 PM
Subject: Re: [Amps] Silicone hose from Flex Technologies
 
Exactly right Jim, it should not absorb RF radiation.  If it does get it out of 
the tank compartment, as well as all ferrous materials.  I think you missed the 
point.
73, Paul

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



----- Original Message ----- From: "Jim Hoge" <knowkode@verizon.net>
To: "amp reflector" <amps@contesting.com>
Sent: Friday, July 20, 2012 10:43 AM
Subject: Re: [Amps] Silicone hose from Flex Technologies


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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