03-24-2013, 02:30 PM
THink I found the problem.
WHen I got this radio there was a different tube installed in the 12k7 tube socket.
This tube did not have a grid cap.
Plus the wire for the grid cap was gone.
Replaced the tube with the correct 12k7gt tube and removed the can on the 1st IF trans. to fix the wire.
There were no traces of a broken wire.
Found out today that the green wire(upper left corner looking from back of chassis) is supposed to go to the grid cap for the tube, but should not be wired to anything underneath the chassis.
My radio is wired with the green going to pin 4 on the 12k7gt tube.
I replaced the 12k7gt tube with a 12sk7 tube(no grid cap) and the radio played and pulled in stations, but very distorted sound.
Apparently someone has done some re-wiring on that tube socket to accept a different tube.
Now what?
Not sure where to go with this basturdized chassis.
Any idea's?
WHen I got this radio there was a different tube installed in the 12k7 tube socket.
This tube did not have a grid cap.
Plus the wire for the grid cap was gone.
Replaced the tube with the correct 12k7gt tube and removed the can on the 1st IF trans. to fix the wire.
There were no traces of a broken wire.
Found out today that the green wire(upper left corner looking from back of chassis) is supposed to go to the grid cap for the tube, but should not be wired to anything underneath the chassis.
My radio is wired with the green going to pin 4 on the 12k7gt tube.
I replaced the 12k7gt tube with a 12sk7 tube(no grid cap) and the radio played and pulled in stations, but very distorted sound.
Apparently someone has done some re-wiring on that tube socket to accept a different tube.
Now what?
Not sure where to go with this basturdized chassis.
Any idea's?
