ADA Depot - A Forum To Support Users of ADA Amplification Gear
ADA Preamps => Original MP-1 => Topic started by: jaykay73 on June 10, 2021, 02:45:22 AM
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Quick question... on the 3TM daughter board, how are the tubes arranged, ie are V1-V3 from front to back or back to front?
What is the role / function of each of the 3 tubes in the circuit?
Any recommendations for best tubes in each position?
Thanks,
JK
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V1 is close to the front panel.
V1 and V2 are gain stages, the OD2 gain is controlled between the first and second triode of V2.
V3, first triode is a gain stage, second triode is a cathode follower driving the tone section.
As for tubes, I like JJ's but other people like different brands, it's personal taste I guess.
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There's been a lot of discussion concerning tube rolling, and trying various strength tubes in different positions.
From what I've been able to put together from these discussions concerning the un-modded MP-1, The most popular trend seems to be putting the higher gain tubes in the V1 positions, and the tubes with not quite as high gain strength in the V2, for a more organic or vintage type of amp distortion.
For a more metal type distortion, it seems to be high gain tubes in both positions.
I don't know if this applies to the 3TM though.
Harley 8)