I'm going to next check the signal path connections in both power supplies and maybe swap tubes in the mics just in case i'm missing something.
To reiterate, it does not seem like the cables and the voltages are spot on spec in both mics.
I'll report back.
OK started testing from scratch. It's not the power supplies. So...
-- B+ and H- are correct measured at both mics. (+210v and -6.35v)
-- Swapped power supplies - no change, mic 1 still 3db hot
-- Swapped tubes - no change, mic 1 still 3bd hot
-- Finally, swapped the 7pin cables - no change, mic 1 still 3db hot
I was hoping it was just a tube, but this still makes more sense to me than it being a power supply issue given that the voltages are correct.
Any recommendations on where to start looking?
Thanks in advance for everyone's help.
-JP