[ARC5] Smart People: Multi-Set Current Corn-fusion

[David Stinson]

Dear People Smarter Than Me:

I'm confused.  Bumped-up the RAX "burn-in" to 100V
B+, which is provided to all three receivers from
the same buss, using a current-limited supply so
if any of the old parts decides to "shuffle off
this mortal coil," the supply will shut that down.
Did some current measurements with all sets in the
same operating mode:

All sets connected and off:  13 mA, within 1 mA of
expected.
LF set playing alone: 30 mA (has fewer stages than
the others).
LoHF set playing alone: 41 mA.
HiHF set playing alone: 46 mA (about 10% "hot,"
will check).
but:
All three playing normally at once: 83 mA.

Ummm... shouldn't that be like 117 mA?

Anybody got an idea?

73 OM DE Dave AB5S