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5965 = 5963 ?

202.190.8.1
Posted on March 21, 1999 at 22:12:36
SHAMSUL Bahrin Kamarudin


 
Greetings TA's,

Is 5965 same as 5963 tube ?

Would like to know is it possible to substitute a 5963 tube into a 5965 socket vice versa?


Regards.

::-)

 

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Yes., posted on March 22, 1999 at 08:18:58
Stephen


 
According to http://www.vacuumtube.com/FAQ.htm

>> 5963--special dual triode used in early computers--has underground audiophile following. Out of production, use 12AU7 instead.

5965--see 5963 <<

 

Re: Yes., posted on March 22, 1999 at 08:27:39
Jack G


 
You can get NOS 5963s. if they were used in computers, then they are ruggedized, and worth looking into.
Jack

 

5965 not quite 5963 ?, posted on March 22, 1999 at 10:33:25
Thorsten


 
Hi there,

The 5965 will draw more heater-current (0.45A vs 0.3A) and seems to have a VERY much different Operating Point....

Better consult the Data-books. I doubt anything will blow, unless the circuit is direct-coupled, but the sound will be a lottery....

Later Thorsten

 

Re: Yes., posted on March 22, 1999 at 17:45:10
Doc B.


 
5963 is a computer grade 12AU7 type tube - mu around 20
5965 is a computer grade 12AV7 type tube - mu around 48
Both use a large cathode, intended to increase their lifetime in vacuuum tube computers. We have found this large cathode can give an increased sense of bass control and dymnamics.

We have used the 5965 in a parafeed preamp, and the 5963 is a nice addition to our Foreplay preamp - but they are not interchangable without some rework of the op points. Also note that the 5965 draws more heater current than the 12AU7 - 450 mA.

Another tube that has a large cathode and sounds very nice is the Svetlana 6N1P. Great bass and dynamics, very smooth top end, none of the typical 8kHz ringing and microphony common to the 6922 6DJ8 7038 types.

 

Re: Yes., posted on March 22, 1999 at 19:13:36
SHAMSUL BAhrin Kamarudin


 
Greetings,

Thanks to ALL for the reply on the 5965=5963 ? subject.

I do agree with Doc B. that for the 12Au7 tube family such as the 5963 tube that has large cathodes can really give an increased sense of bass control and dymnamics.


Regards.

::-)

 

Informative post., posted on March 23, 1999 at 07:48:33
Stephen


 
Thanks for the valuable input.

 

Re: Yes., posted on March 26, 1999 at 19:51:59
Todd A.


 
My VAC V-100 monos use 12AU7s on the inputs. Presently I am using the Mullards the amp came with, would the 5693 be a recommended change for this application ?

Thanks, and be well,
Todd

 

Re: Yes., posted on April 1, 1999 at 08:57:13
Doc B.


 
Yeah, it will work.

 

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