[ARC5] Equivalent tube types

[Roy Morgan]

On Jul 15, 2012, at 6:21 PM, Bob Macklin wrote:

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

12AU7 military/commercial equivalent is 5814  Used in the R-39x series.

> It was made for computer service.

 From my tubes notes file:

> From: Dennis Monticelli <dennis.monticelli at gmail.com>
> Date: April 2, 2011 1:34:39 PM EDT
> To: Bob Macklin <macklinbob at msn.com>
> Cc: ARC-5 List <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] Interesting occurrence...
>
> Right you are, Bob.  The 5814A (not the plain 5814) is a "computer  
> rated"
> 12AU7.
(This is wrong, I think.  the 5814 is industrial/military rated.)

>  The 5963 is a quieter computer-rated 12AU7.  Dual triodes were
> commonly used in logic circuits.
(not sure on the "quieter" part, though computer rated is right.  The  
12AY7, is a quiet and microphonics-, hiss-, and hum-reduced medium mu  
double triode intended for low level audio amplification.   (Current  
AES price is $25 each.)  It has differing-ratings equivalents of 6072,  
and 6072A.  (Current AES price is $25 each.)

> Other computer rated tubes were: 5844, 5915A, 5965, 6211, 6463,  
> 5963, 5964,
> 5965, 6197, 6350, and 6887.  Manufactureres were predominately GE  
> and RCA.
> These tube types often show up in boxes of misc tubes FS and  
> frequently as
> NIB.  Because people aren't familiar with them they usually go  
> begging for a
> home.  This is sad because many are just improved versions of  
> commonly known
> tubes.  For example the 5844 is a 6J6.  The 5915 is a 6BE6.  The  
> 5965 is a
> 12AV7.  The 6197 is a 6CL6.  etc.  Something to think about the next  
> time
> you rummage through an old box.

No savvy hamfest tube user should be without a carefully prepared  
tubes-wanted list.

Use the following link to find equivalents and near equivalents for  
any tube you can think of:

http://tdsl.duncanamps.com/tubesearch.php

Roy


Roy Morgan
k1lky at earthlink.net
K1LKY Since 1958 - Keep 'em Glowing!