[ARC5] Equivalent tube types

[Bob Macklin]

There is a 57?? that is an alternate for the 12AU7.

It was made for computer service.

I assume you are thinking about the 12AT7, 12AU7, and 12AX7.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"


----- Original Message ----- 
From: "Leslie Smith" <vk2bcu at operamail.com>
To: "ARC-5 List" <arc5 at mailman.qth.net>
Sent: Sunday, July 15, 2012 3:11 PM
Subject: [ARC5] Equivalent tube types


> Dear list:
> There are well known equivalents (long life, high reliablity) to the
> 12A?7 series of tubes.
> (See?  you guys have corrupted me.  I now call a "valve" a "tube"!  
> Aaarghhhh!  My soul is bound for perdition ....)
> 
> Can any-one tell me the numbers?
> It's 6000 or 9000 or some number like that.
> 
> Ditto for the 9000 .. 9003 types.
> There are "common" equivalents for these.
> Can anyone help?
> I have an ARC VHF set that uses these tubes but there are some that are
> hard to get.
> 
> Thanks
> 
> 
> -- 
>  Leslie Smith
>  vk2bcu at operamail.com
> 
> 
> -- 
> http://www.fastmail.fm - A no graphics, no pop-ups email service
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