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RE: As I always advise in situations such as this,...

Posted by ChasLieb on September 25, 2015 at 14:01:09:
I have the MA-1 deluxe which is a 12 tube version of the MA-1 with a very robust power supply which I was given to understand was from the MA-2. The amp was brought up to 3.1 status and the voltage tubes were all changed to 6sn7s. I am assuming that one row of 6as7 tubes makes up one bank and when you say to measure voltage you are referring to the voltage in the tube socket of one anode to cathode in a socket on one row of 6 as compared to one anode to cathode of a socket in the second row of 6, in order to see if the PS has an imbalance between the two banks in B+ voltage?

Thanks,

Charles