14 Aug
2014
14 Aug
'14
1:33 p.m.
I think that the venerable 6888 pentode was designed
specifically for Grid 3
computer logic applications.
I think the 6888 was developed for the SAGE processors, and perhaps
only used there. Every 6888 I have seen - and that is a *lot* of them
- has had an IBM/SAGE part number.
All sorts of interesting stuff to be found in tube
manuals. Did the 6BN6
gated-beam tube ever see computer application?
Probably not. 6BN6s were not computer rated. The much later 6KS6 may
have worked, as most tubes from the later years were OK for computer
use, even if not specifically rated for it.
I remember seeing some circuits using paralleled
triodes in a
cathode-follower configuration being touted as transformerless speaker
drivers. I don't know if they ever made any headway in the commercial world
as such.
I doubt so, back in times past, because audio output transformers were
relatively cheap, and the big low-mu monster triodes were not. Now
things have changed, and 6AS7 and friends often can be purchased for
peanuts, so there are indeed tube amplifiers that lack output
transformers. One must be very careful with them, and use proper
speakers, or there will be trouble.
--
Will