[Amps] Equalising the air flow on Commander 2500 tubes/replacement neoprene chimneys

[mikflathead at aol.com]

 I would try MSC industrial supply. Mike

 

 

-----Original Message-----
From: Jay Sturtevant <k2ztdx at gmail.com>
To: Steve Ireland <vk6vz at arach.net.au>
Cc: amps <amps at contesting.com>; Phil Hartwell <vk6gx at 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 at 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>> ---> This email has been checked for viruses by Avast antivirus software.> https://www.avast.com/antivirus> _______________________________________________> Amps mailing list> Amps at contesting.com> http://lists.contesting.com/mailman/listinfo/amps>_______________________________________________Amps mailing listAmps at contesting.comhttp://lists.contesting.com/mailman/listinfo/amps