[Amps] AMP TUBES

[David H Craig]

    Just curious- my understanding was the RUs are still manufacturing 
GS35bs- am I wrong on this account?  I have a "stock" onhand but am worried 
they too will become scare if this is the case.

    FWIW I haven't the multi-amp bulding experience of others, but I can say 
this- unlike the 3CPX800 / 8877 etc, the GS35b can take all the abuse you 
can throw at it.  I don't even bother measuring grid current.  Doesn't give 
quite the gain of an 8877, but more than sufficient for legal limit.  I can 
also lose 4-6 of them for the price of one screw-up with an 8877 or 3CX800, 
though I haven't had that problem either.  My current GS35b project(s) are 
on on 6m, and the primary homebrew GS35b amp has been QRV for 2 years now... 
over that time I watched local friends replace 8877s & multiple 3CX800s 
while the Russian tube keeps chugging right along with 3875V on the plate 
and a lower-than-spec blower CFM flow.  My SB220 6m conversion did well for 
years on Eimac moly 3-500Zs, but the Chinese version didn't last 2 years 
before they softened (probably heat, but who knows?).

    N3DB


----- Original Message ----- 
From: <W1dxh at aol.com>
To: <amps at contesting.com>
Sent: Wednesday, May 21, 2008 9:49 PM
Subject: [Amps] AMP TUBES


> With all the talk of Russian tubes  being hard to get. And a question  of 
> the
> quality of Chinese tubes what is the status of American made Eimac  tubes 
> and
> the availability of them? Is cost the main reason for looking  elsewhere, 
> or
> is the quality not there? Who is supplying the medical field with  tubes?
> Just curious...
>
> 73's,
> Steve  W1DXH
>
>
>
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