[R-390] 5963 vs 5814

[Charles P. Steinmetz]

Gordon wrote:

>Can I use 5963 tubes in place of some of my 5814 tubes? They both 
>cross to the 12AU7.  I have some extra 5963's and some weak 5814 
>tubes that need replacing.

Probably, but note two things.  First, the 5963 is designed for use 
as a binary logic element, not as an amplifier, so its characteristic 
curve may exhibit more distortion than a 12AU7 or 5814 (both of which 
are designed as class A amplifiers).  Second, vacuum state logic used 
lower supply voltages than most amplifier applications, so the 5963 
is only rated for 250 volts on its plate (compared to 330 for the 
12AU7/5814).  As long as you stay within the plate voltage rating, I 
doubt you would notice any difference in practice.

Best regards,

Charles