Since I didn't know , I was referring to Pier's ma-1 germanium pre , because I couldn't see & your's
didn't seem to be a 2520 type as his was not , was trying to figure it out , just a little friendly kidding .
class A Iron goodness ?
correct. the value table Darius calculated did either go from 20 to 64 dB, or 25 to 69 dB.
this was done for Pikatron a output transformers, we now decided to go for a Haufe which needs some adjustment. I'm sure Darius is already calculating 8)