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Re: [Amps] GS-35b fully-submersed oil cooling

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Subject: Re: [Amps] GS-35b fully-submersed oil cooling
From: Mike Waters <>
Date: Sun, 15 Mar 2015 18:42:26 -0500
List-post: <">>
Just a couple of comments/questions. I have some thoughts about the
mechanical, non-RF side of this, but per your request, I will hold them for
another time.

Basically, I think oil cooling of some sort would work. Low anode temp
would not be an issue for this tube,

What is "dry" transformer oil?

What is the dielectric constant of that oil?

What do you mean by "close-housing..."?

73, Mike

On Sat, Mar 14, 2015 at 6:17 PM, Steve Wright <>

> Greetings gurus!
> Any comments on the proposition of completely submersing a GS-35b (with
> stock cooler attached) in a cooling bath of dry transformer oil?
> Considerations:
> Basically, I have no interest in a nasty howling centrifugal blower in my
> shack.  A quiet hum from a rubber-mounted liquid pump will be annoying
> enough.
> Can the GS-35b operate at such a low temperature of 45-65 degrees C?
> What effect will the oil submersion have on its' RF operating?
> What will be the effect of close-housing the tubeset in a sealed alloy box?
> RF discussion please.  Mechanical and/or other problems will be addressed
> later AFTER it is established that it is a viable proposition RF-wise.
> All constructive criticism welcome.
> Steve ZL1BHD
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