[ARC5] Equivalent tube types

[mac]

Sibley describes the 5814. A, WA as a redesigned and ruggedized  
12AU7.  Says the "A" is computer-rated.

Dennis D.  W7QHO
Glendale, CA

*************
On Jul 15, 2012, at 3:54 PM, Roy Morgan wrote:

>
> 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!
>
>
>
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