You are most likely chasing a phantom here.
Remember that no 2 sets are exactly alike, and tubes are VERY forgiving about their bias sources.
If it says "385v" on a SAMS, this does not mean that the MUST BE that voltage there ABSOLUTE, there will always be variance, sometimes +/- 10% and this does not necessarily mean there is a problem, this is in fact normal.
but by all means, check the PWS area, but you will most likely find, there is nothing to worry about there.
