11-27-2008, 07:31 PM
Very good point, Bill (wonderwrench). I believe Brian can tell us some stories about getting the dial aligned for best performance.
Curiosity got the best of me so I pulled my 37-60 out again. I see the .05 cap is well grounded right to the frame of the tuning cap. Not much room for error there. I also measured from my grid cap to chassis and saw the 2.0 Megs I suspected. That would confirm no shorts to ground in the coil/tuning assembly.
I hate to mention this because its dumb but I once found a radio where the grid cap wire had been connected to the wrong section of the tuning cap by a previous restorer. There had been a gimmick between the two sections on top of the tuning cap. The fellow had replaced it with a straight wire. (the tube label inside the cabinet actually had a line drawn there in the pictorial layout diagram) Using the same logic he reattached the grid wire to the terminal which happened to be the wrong one. That radio actually played a little bit - although I'm not sure how. I found the straight-wired gimmick easy enough but I didn't realize that the grid was incorrectly connected.
It goes to the rear section in the Philco.
Curiosity got the best of me so I pulled my 37-60 out again. I see the .05 cap is well grounded right to the frame of the tuning cap. Not much room for error there. I also measured from my grid cap to chassis and saw the 2.0 Megs I suspected. That would confirm no shorts to ground in the coil/tuning assembly.
I hate to mention this because its dumb but I once found a radio where the grid cap wire had been connected to the wrong section of the tuning cap by a previous restorer. There had been a gimmick between the two sections on top of the tuning cap. The fellow had replaced it with a straight wire. (the tube label inside the cabinet actually had a line drawn there in the pictorial layout diagram) Using the same logic he reattached the grid wire to the terminal which happened to be the wrong one. That radio actually played a little bit - although I'm not sure how. I found the straight-wired gimmick easy enough but I didn't realize that the grid was incorrectly connected.
It goes to the rear section in the Philco.
