I would try MSC industrial supply. Mike
-----Original Message-----
From: Jay Sturtevant <k2ztdx@gmail.com>
To: Steve Ireland <vk6vz@arach.net.au>
Cc: amps <amps@contesting.com>; Phil Hartwell <vk6gx@yahoo.com>
Sent: Fri, Jul 27, 2018 9:27 pm
Subject: Re: [Amps] Equalising the air flow on Commander 2500 tubes/replacement
neoprene chimneys
Steve,I have a Commander HF 2500, 1996 vintage, however, there are no chimneys
ontop of the 3cx800s and I do not have a "solid screen". The amplifier you're
describing may be a later vintage.I don't want to waste your time--
curious.Thanks!Jay, K2ZTOn Fri, Jul 27, 2018, 10:13 AM Steve Ireland
<vk6vz@arach.net.au> wrote:> G’day everyone>> A good friend of mine has
recently acquired a Commander 2500 which is need> of repair/rebuild after a
long and hard life.>> On taking the amp apart, he noticed one of the neoprene
chimneys on the> (two) 3CX800 tubes was more melted than the other. He then
put the amp’s> fan on and discovered the tube with the more melted chimney was
receiving> considerably less air flow than the other, owing to a screen placed
between> the two tubes.>> A potential solution was to replace the solid screen
with a mesh one, but> I said it was likely that someone on this reflector had
already come up> with a solution/modification to solve this problem and I’d ask
for him.>> It also occurred to me that someone may know where some suitable
neoprene> can be purchased, so he can make replacement chimneys for the two
tubes.> Any ideas on this would also be approached.>> Vy 73>> Steve, VK6VZ>>
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