Originally Posted by mordy
Could you elaborate on double triodes that you feel are equal to but different from the C3g tubes? The cheapest I could found a pair of the C3g tubes was $70 incl shipping.
Well, of course this is all very subjective... My current favorites are Sylvania 6SN7W, both short and tall bottle, Fivre 6SN7GT, National Union gray glass 6SN7GT, Heerlen- or Eindhoven-made E80CC and 1975 Voskhod 6N23P. If you can find them, the Voskhods are probably the cheapest of these, but in my experience, when purchasing from Ukraine and Russia, I never really know what I am going to get before they arrive.... I believe you have a '74? I find it to sound virtually the same as the '75.
I am very poor at comparing tubes... I don't have the discipline or the ears for it.... But I can say that in my mind, these are all top-tier tubes, they are all very, very close, with only very subtle differences. One might be a bit more forward, one might be a little more warm, one might have a bit more bass detail, and so on.... I could be happy with any of them long term.