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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: VTA Amplifiers posted by pictureguy on July 4, 2021 at 00:53:29:
"why that particular tube was chosen when it would appear several other choices exist"
As has been stated already, the 12AU7 is still in production and made in huge quantities for the guitar market. Everyone has heard of the 12AU7 and 12AX7 because of the guitar market, so it is natural for a vendor to make use of the tubes that people are familiar with and comfortable with.
Of the tubes I mentioned earlier; 37, 76, 6P5G, 2C22, 7119, 5687, 6CG7, 6F8G, and the 6SN7, only the 6CG7 and 6SN7 are still produced as far as I know. It makes no sense for a vendor intent on selling quantity to use a tube like the 6F8G that now go for almost $100 if you can find them. So the use of these older tube types is relegated to those who DIY.
I should also mention that beyond the 56 and 6J5 archetypes, there is an entire range of much newer tubes that provide not just low distortion but serious transconductance and high Mu. Again, with the exception of some super high end vendors that use the Russian tubes, these exceptional tubes are not ever used by commercial vendors. So tubes like the EC86, EC8010, C3g(T), D3a(T), 7788(T), and E180F(T) and several others are only used by the DIY builders.
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Follow Ups
- RE: VTA Amplifiers - Palustris 07:51:27 07/05/21 (0)
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