11-11-2012, 09:00 AM
Johnny
The 57 front end should be hooked up like this:
[Image: http://i326.photobucket.com/albums/k420/...ff/57a.jpg]
Notice the 20K resistor (9) from the 77 screen grid (pin 3) to ground. Capacitor (7) and resistor ( 8 ) from the 77 cathode to the oscillator coil tickler winding; the other end of the tickler winding goes to ground.
But from your description, it sounds like things are hooked up as follows:
[Image: http://i326.photobucket.com/albums/k420/...ff/57b.jpg]
See how cap (7) and resistor ( 8 ) are now on the other side of the tickler winding, with the top of the tickler going straight to the 77 cathode?
This is how the tickler and the cap-resistor network are wired up in Model 80. The radio will probably work either way, but I think I would follow the 57 schematic (first example above).
The 57 front end should be hooked up like this:
[Image: http://i326.photobucket.com/albums/k420/...ff/57a.jpg]
Notice the 20K resistor (9) from the 77 screen grid (pin 3) to ground. Capacitor (7) and resistor ( 8 ) from the 77 cathode to the oscillator coil tickler winding; the other end of the tickler winding goes to ground.
But from your description, it sounds like things are hooked up as follows:
[Image: http://i326.photobucket.com/albums/k420/...ff/57b.jpg]
See how cap (7) and resistor ( 8 ) are now on the other side of the tickler winding, with the top of the tickler going straight to the 77 cathode?
This is how the tickler and the cap-resistor network are wired up in Model 80. The radio will probably work either way, but I think I would follow the 57 schematic (first example above).
--
Ron Ramirez
Ferdinand IN
