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Headphoneus Supremus: Why is there a chaplain standing over his wallet?
Originally Posted by Rob N
One thing I've just noticed,Sylvania 6SN7W's with metal base can also have green printing on the base as well as black
It actually goes far beyond that. Metal base tubes with 6SN7W on the base have been known to have 6SN7A on the bottle. 6SN7A's have been known to have 6SN7GT on the base, etc. I think I've got as many metal base tubes that have inconsistent labeling between bottle and base as those that are in agreement.
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The 6SN7A is actually a slightly different variant of the 6SN7 than the 6SN7W, but I've forgotten what the differences actually are.
google is my friend.
"There are two versions of the metal base Sylvania, one designated 6SN7A and the other 6SN7W. Often the 'A' version is mislabelled 'W' just to make it more confusing.
The 'A' is a taller bottle and the bottom mica extends just on top of the metal base. It has copper grid posts. The 'W' is shorter and as a result the bottom mica is recessed inside the base ring. Regular grid posts. The tall bottle 'A' is much rarer, but that is truly splitting hairs as they are both extremely difficult to find."
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Headphoneus Supremus: Why is there a chaplain standing over his wallet?
Originally Posted by adhoc
google is my friend.
"There are two versions of the metal base Sylvania, one designated 6SN7A and the other 6SN7W. Often the 'A' version is mislabelled 'W' just to make it more confusing.
The 'A' is a taller bottle and the bottom mica extends just on top of the metal base. It has copper grid posts. The 'W' is shorter and as a result the bottom mica is recessed inside the base ring. Regular grid posts. The tall bottle 'A' is much rarer, but that is truly splitting hairs as they are both extremely difficult to find."
Google may be a friend, but the labels on the tubes are a pain in the butt, as they really don't match the description. If this is accurate, I've got some "A"s mislabeled as "W"s as well as the reverse. I suspect that this description of the differences is not complete, as I believe there were also metal base GT's, making at least three possible Syl metal base variants. There is no real correlation between bottle height and tube type that I've found.
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Google may be a friend, but the labels on the tubes are a pain in the butt, as they really don't match the description. If this is accurate, I've got some "A"s mislabeled as "W"s as well as the reverse. I suspect that this description of the differences is not complete, as I believe there were also metal base GT's, making at least three possible Syl metal base variants. There is no real correlation between bottle height and tube type that I've found.
Hirsch, Adhoc,I have a MPX3 comming from Mikhail on Tuesday or Wednesday and I have been reading with much intrest all of the threads on tubes.
Question: So from your quote finding the right tube is going to be hard..But is there also any info as far as price i.e. whats a fair price on xyz tubes so we tube newbies don't get taken to the cleaners.
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