[jerryhawthorne]

Eric, keeping in mind this is a "hot" chassis AC/DC radio, do you have an isolation transformer? If not, I would be reluctant to use your signal generator on that radio. I threw some major sparks prior to getting an isolation transformer. If you do, I would set the radio to AM and use the generator at 455KC with the modulation on and start moving it along the grids (pin 1) to ground from V3, V4, V5 and V6. Looking for the modulated hum. This could help determine where your losing your signal and allow you to focus on one area.
Regards, Jerry