Hello everyone. I've got a problem with my Realistic TRC 453 (simillar to Uniden PC-122 Radio). It has no modulation on AM mode (carrier only), but on SSB mode everything is allright and modulated. So I am asking you. How I can fix it up? Driver, and PA transistors are OK. I picked a new capacitor 47uF near to the NE612 modulator and trying to resolder the area around. Turning the VR of AM mod changes nothing. :headbang Any ideas? 73!