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In Reply to: RE: 6SN7 and the VT231 designation. posted by SETdude on September 15, 2015 at 14:46:17
A little follow up-
Given the age of most of these tubes it has been very hard as a hobbyist to experience any significant difference in quality between the VT-231s and commercial tubes.
If the really military did insist on tighter specs why stop at WWII? Wouldn't that have continued through to the early Vietnam era? Thus my question- VT-231 stopped when?
Steve
Follow Ups:
What differences are you looking for? Sound? The sound a VT-231 makes in a piece of audio was not a concern in its manufacturing. I sold three recently, and could not tell the difference between any of the VT-231s and a Japanese something that's in the preamp now, or whatever happened to be in the slot that day.
"I can't compete with the dead". (Buck W. 2010)
Why stop?They're called transistors and circuit boards, miniaturization, lighter loads, reliability, production speed, cost savings.
"I can't compete with the dead". (Buck W. 2010)
Edits: 09/18/15
Western Electric didn't stop production of the 300b until the military stopped buying them in 1988.
Just saying....
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Yes I recognized the advent of the transistor by saying it would have lasted until the early Vietnam war era. It did not even get though the Korea "conflict" wouldn't that have required tighter spec tubes as well. It is unlikely that they changed the machines to make the VT-231 tubes, I would think they might have been selected by various quality control stations along the way of manufacture. Just guessing...
In any event you and I agree that any improvement in building the tubes didn't translate into any obvious change in sound quality.
Steve
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