Yes, water cooling would be really neat! I understand that the GS-35a version
of the tube has a water-jacket, but you never see those for sale. I have seen
some home brew examples for other tubes, but it might be a little difficult to
build my own water-jacket and then.... how do you provide a water tight seal
around the tube that will withstand the heat? I suppose a simple fish tank
pump and some plastic tubing would work for coolant circulation and then maybe
some sort of small radiator or cooling tank to dissipate the heat. Seems like
it would work if the details could be worked out.
73, Jack, W9GT
________________________________
From: "mikflathead@aol.com" <mikflathead@aol.com>
To: paul@n1bug.com; w9gt@frontier.com; amps@contesting.com
Sent: Thursday, February 20, 2014 9:42 AM
Subject: Re: [Amps] Fan Noise in GS-35b Amplifiers
Some builders water cool these tubes. It that an option?
-----Original Message-----
From: N1BUG <paul@n1bug.com>
To: Jack C. Shutt <w9gt@frontier.com>; amps <amps@contesting.com>
Sent: Thu, Feb 20, 2014 9:27 am
Subject: Re: [Amps] Fan Noise in GS-35b Amplifiers
I don't know what the "recommended" blower is, but bear in mind slow
speed blowers can be much less noisy than high speed ones. They tend
to be physically larger, however. On some prior amps I used high
speed (2500-3000 RPM I think) blowers that were physically rather
small. They got the job done but were very noisy. On my current
generation 4CX1500B amps I use Dayton 2C647 blowers. They run at
1500 RPM, but move about the same amount of air by using a larger
squirrel cage. They are much quieter. I suspect even this amount of
noise would be objectionable to many people but those blowers are
far less noisy than the 4" fan in my rack mount server case that
houses the shack PC. Something has to be done about that fan! 73,
Paul N1BUG On 02/19/2014 11:07 AM, Jack C. Shutt wrote:
> I have gathered from all the info that I have read on amps using
> the GS-35b that a healthy air flow is necessary to keep these
> tubes happy. Unfortunately, the 100 CFM squirrel cage blower
> that is recommended for this purpose is quite noisy. Any
> suggestions for an effective cooling arrangement that is quieter?
> I thought about remotely locating the blower and using a hose
> duct to the amp, but this is just not practical in my shack.
> Suggestions? 73, Jack, W9GT
_______________________________________________
Amps mailing list Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|