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previous: Bruce I'd like to pretend I know a little... -- 9/16/1999 5:04 AM

Re: Tweed Deluxe OT

9/16/1999 6:00 AM
Ted Matsumura	Re: Tweed Deluxe OT Hi Bruce, Of course, you are correct in that the official first pre-amp tube is a 12AY7 and I have plenty of these NOS. I still have used 12AX7/7025's in both positions for years. There is quite a bit of variance in these as well, I can measure some brand new GE 7025s down to 35 transconductance, and then some Ruby or WXT's at 48/50, so I wouldn't bet that a 12AY7 is always going to be lower gain than any 12AX7 today. What the 12AX7 in position 1 lets you do is to more easily overdrive the preamp section with a high input level, not so much from pickups, though probalby possible, but I mean from a reverb or pre-amp with a variable output gain.

9/16/1999 6:00 AM

Ted Matsumura

Re: Tweed Deluxe OT

Hi Bruce,

Of course, you are correct in that the official first pre-amp tube is a 12AY7 and I have plenty of these NOS. I still have used 12AX7/7025's in both positions for years. There is quite a bit of variance in these as well, I can measure some brand new GE 7025s down to 35 transconductance, and then some Ruby or WXT's at 48/50, so I wouldn't bet that a 12AY7 is always going to be lower gain than any 12AX7 today. What the 12AX7 in position 1 lets you do is to more easily overdrive the preamp section with a high input level, not so much from pickups, though probalby possible, but I mean from a reverb or pre-amp with a variable output gain.

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Fj INHO...(make me stand in the corner... -- 9/26/1999 3:32 PM