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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: posted by Frihed89 on February 2, 2015 at 02:35:16:
You mean the plate of the gain stage (1/2 6SN7) is coupled to the grid of the follower (6AH4) and there is no cap there. There is just a wire with clear insulation connecting these points. The large copper-colored caps are output caps, since one end of each is connected directly to the output RCA jacks.
What I don't understand is why the other ends of these caps are not directly connected to the follower cathodes. It looks like there are two resistors in parallel off the cathodes, then a wire runs to a board with some chips on it, then another wire runs back to each output cap. But maybe those resistors aren't in parallel.
Anyway, +1 to the suggestion you contact Kara at DeHavilland for help with the gain issue. Remember, you want to maintain the sound quality you already have, and using a different tube type is not likely to get you there. 6BL7 and 6BX7 have the same pinout as 6SN7, and even big twin triodes like the 6AS7 do too, but the operating parameters are very different.
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Follow Ups
- Nope, it is direct coupled - JJ Triode 10:10:19 02/02/15 (1)
- I suspect your conclusion about the sound is correct - Frihed89 11:22:22 02/02/15 (0)
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