Quote:
Originally Posted by 4 Strings
There is a "mirrored" 12DW7 too, where triode 1 has an amp. factor of 17 and triode 2 has 100. I just can't remember what it is called, perhaps Billm does?
In a circuit such as the 5E3 with a concertina PI this could make a difference if you either want to push the PI triode of v2 with 17 % and the other with 100 % or vice versa. Never tried it myself though.
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JJ Electronics makes an "ECC823", which is the mirror version of the 12DW7/7247/ECC832. While not unafraid to rewire my amps, I'd pick whichever tube put the 12AU7 triode as the PI with the stock wiring.
- Scott