[codefox1]

Please see the schematic and by serial number or landmarks see which chassis you have. There seem to be some differences in the antenna to RF arrangements. I assume you have done an alignment, because the symptoms you have could be caused by mistuning of the first stage, or a bunch of crap caught in the compensating capacitors. There also seems to be some information on resistances, etc.

Why not treat yourself to some better quality schematics on co moderator Chuck' Schwark's site:

http://www.philcorepairbench.com/schematics.htm

Meanwhile I'm sure others will have some thoughts.