05-16-2021, 09:50 AM
My latest update on this. I made a PC Board for the parts and tubes. Revised the schematic.
Also found that the capacitor across the Plate and Cathode of the 12L6 was causing oscillations. It was moved to go across the audio transformer instead. Now the audio is crystal clear but I was having issues with the local 500KW AM station that is 3 miles away by air getting into everything. I'm replacing the IF transformers yet again and will employ some additional shielding.
Also found that the capacitor across the Plate and Cathode of the 12L6 was causing oscillations. It was moved to go across the audio transformer instead. Now the audio is crystal clear but I was having issues with the local 500KW AM station that is 3 miles away by air getting into everything. I'm replacing the IF transformers yet again and will employ some additional shielding.
