Hi to all! I have an Atwater Kent Model 20, only have 3 201A tubes it´s possible to run it with 2 112A tubes in place of the missings 201A? I build this AC power supply:

http://www.ka7oei.com/ak20c_ps.gif

Never tried it, but the pinouts are the same and have similar voltage ratings. I would stick one 112A in the detector position and one in the first RF, and see what happens.

Used '01As are often available for $10 or so. Weak ones can be rejuvenated on a tube tester.

:Never tried it, but the pinouts are the same and have similar voltage ratings. I would stick one 112A in the detector position and one in the first RF, and see what happens.
:
:Used '01As are often available for $10 or so. Weak ones can be rejuvenated on a tube tester.

Many thanks Doug! Yes they are very similar, I will try one as Detector and the other in 1st RF hope they work!