Atwater Kent Model 67 uses 3 - #22, 2 - #12A and 2 -#71A tubes. These are all 4 pin.
What voltage is wired to filament of your 5 pin sockets. There wasn't very many 5 pin, battery, output tubes available when this radio was made. #49 and #33 are 5 pin tubes both with 2 volt filaments.
Norm
:I finally got my DC power supply done and went to hook up my Atwater Kent model 67 (battery). I had aquired all the tubes it needed. As I was putting in the new tubes I got to the 2A tubes in the back which are suposse to be cx-371A, UX-171A, or a 71A tubes. These fore mention tubes are four pin tubes. However, the tube sockets where they are to fit are 5 pin sockets. It looks like they were orginally wired in at the factory. What tube do I need to go into these five tube sockets? Don't you just hate it when the radio you are working on is somehow different than it schematic? Thanks!!!!!!!!!!
According to the schematic it is 5 volts. However, the schematic does not show a five pin socket. I guess I need to attach it to the power supply and see what voltage goes to the filametes of these two tubes. If it is two volts, I have two 33 tubes that I will try.
Thanks for the advise.
Joe :>)
:Hi Joe
:
: Atwater Kent Model 67 uses 3 - #22, 2 - #12A and 2 -#71A tubes. These are all 4 pin.
:
: What voltage is wired to filament of your 5 pin sockets. There wasn't very many 5 pin, battery, output tubes available when this radio was made. #49 and #33 are 5 pin tubes both with 2 volt filaments.
:
:Norm
:
::I finally got my DC power supply done and went to hook up my Atwater Kent model 67 (battery). I had aquired all the tubes it needed. As I was putting in the new tubes I got to the 2A tubes in the back which are suposse to be cx-371A, UX-171A, or a 71A tubes. These fore mention tubes are four pin tubes. However, the tube sockets where they are to fit are 5 pin sockets. It looks like they were orginally wired in at the factory. What tube do I need to go into these five tube sockets? Don't you just hate it when the radio you are working on is somehow different than it schematic? Thanks!!!!!!!!!!
According to the schematic it is 5 volts. However, the schematic does not show a five pin socket. I guess I need to attach it to the power supply and see what voltage goes to the filametes of these two tubes. If it is two volts, I have two 33 tubes that I will try.
Thanks for the advise.
Joe :>)
:Hi Joe
:
: Atwater Kent Model 67 uses 3 - #22, 2 - #12A and 2 -#71A tubes. These are all 4 pin.
:
: What voltage is wired to filament of your 5 pin sockets. There wasn't very many 5 pin, battery, output tubes available when this radio was made. #49 and #33 are 5 pin tubes both with 2 volt filaments.
:
:Norm
:
::I finally got my DC power supply done and went to hook up my Atwater Kent model 67 (battery). I had aquired all the tubes it needed. As I was putting in the new tubes I got to the 2A tubes in the back which are suposse to be cx-371A, UX-171A, or a 71A tubes. These fore mention tubes are four pin tubes. However, the tube sockets where they are to fit are 5 pin sockets. It looks like they were orginally wired in at the factory. What tube do I need to go into these five tube sockets? Don't you just hate it when the radio you are working on is somehow different than it schematic? Thanks!!!!!!!!!!