[R-390] Powering PTO's out of circuit

[Norm - WA3KEY]

Has anyone on the list powered an R-392 PTO out of the receiver?  I
constructed a simple fixture using a Heath IP-17 power supply and
frequency counter for setting end points and have used it successfully
with R-390A and R-390 PTOs, but have been unable to get an R-392 PTO
to run out of circuit.  Perhaps it has something to do with the 26D6
serving double-duty as an oscillator/mixer.  Attached are the pin-outs
I'm using on all three.

Thank you.

Norm - WA3KEY
norm at wa3key.com




R-390 (Non-A)  Range: 3.455-2.455MHz

  A - +180vdc B+
  B - n/c
  C - 6.3vac filament
  D - Filament ground
  E,F - n/c Oven
  H - Ground



R-392  Range: 3.455-2.455MHz

  A,B,C,D - n/c
  E - +28vdc filament
  F - +28vdc B+
  H - Ground



R-390A  Range: 3.455-2.455MHz

  A - +180vdc B+
  B - +150vdc Screen
  C - n/c Spare
  D,E,J,K - n/c Oven
  F - Ground
  H - 6.3vac filament