In Reply to: RE: Fisher MPX-65 Tubes? posted by sony6060 on October 31, 2014 at 13:54:21:
Thanks for the reply.
My service manual shows those tube marked as v100, v101, and v102. V102 is the tube adjacent to the balance control; Which one is the other tube I can swap out with a 12AT7?
I read somewhere that early Fisher 400's had two 12AT7 tubes rather than three 12AX7's.
If I understand your reply; Your saying that the 12AT7'S are a upgrade over the 12AX7?
I just changed out the 330k grid resistors with 200k, as well the .047uf coupling caps with Russian K40 .1uf PIO caps.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Fisher MPX-65 Tubes? - geezerrocket 20:32:03 10/31/14 (0)