[R-390] R-390A BFO PROBLEM

[Harold Hairston]

Ever since the 3TF7 Ballast tube went out, I have had a BFO problem. I need to get to the BFO Tube socket beneath the chassis. To do this safely, I need to pull the BFO Drive Shaft forward. But I can't get the coupling unit nearest the BFO Tuning Unit to release. I have removed both set screws and put a few  drops of penetrating oil in the holes with no success. However, I can hold the shaft coming from the Tuning Unit with long nose pliers and can turn the coupling unit with my hand. I am reluctant to put more pressure in this area in fear of damagng the tuning unit or the "Bellows" type device between the two shafts.

I must be missing some thing here. Right???

Thanks for any suggestions.

Harold