[TenTec] Fwd: Tentec Centurion bias question

[Floyd Sense]

I recently acquired an early Centurion (serial 10A10221) from an SK's 
estate.  The resting plate current, PTT not keyed, is around 100 ma and
the 3-500ZGs have a nice orange plate glow. I had read in the archives 
that later changes resulted in a much lower resting plate current and 
set out to see what the current state of circuits is in this amp. ( Yes, 
I know that level of plate current is OK, but it generates considerable 
heat on the desk that I don't need.)

The amp has obviously been updated at some point as the Filament-AC 
board has the new bias circuitry and the QSK board is revision C. The 
Filament-AC board circuit as shown in the 10/94 rev C diagram agrees 
with the schematic. So, I'm guessing that I might have all the latest 
changes in regards to bias. The question is: Is the observed 100 ma 
resting plate current what others are seeing in the Centurion with the 
later bias changes? If that level is normal, I was thinking about maybe 
using the Ameritron ESB-1H board which would reduce the resting current 
to just about nothing with no excitation. Any thoughts?  Tentec has not 
responded to an email on the subject.

73, Floyd - K8AC