[NJARC] Missing tube in SW converter

[sgt88 at atlanticbb.net]

Hi all:

I picked up a 3 tube 1930's shortwave converter that has a missing tube.

It receives 200 to  20 meters in two band selections.

It has an AC cord.

There are no markings anyplace to be found...style-wise it looks very 
similar to the Stewart Warner 301-a...which is a 4 tube unit.

It looks to be a commercial unit..not homebrew.

Mine has a Airline 24-A and a Arcturus 127...and the empty tube socket.

The only other item I can ID is a "Potter p/n 66?2B FCA????"...which looks 
like a capacitor ...brown paper wrapping...4-1/4 x 1-5/8 x 1 inch having 
four leads.

The missing tube socket is a 5-pin with no grid cap lead...one pin 
connection goes to the 4-stator/3-rotor tuning capacitor.

Curiously, there is a 2-page typed instruction 'manual"...no ID on it 
either...it references some station settings on the 0 to 100 tuning dial :
W1XAZ
W8XAL
W3ZAL ( how did a Bound Brook, NJ station get a "3" call? )

It's not a Marshall 738 nor Sparton ( 4 tube unit ).

Since I know that I'll get the tube type...I'll offer a lolly-pop prize to 
get the schematic!!!

Thank you,
Steve T.