[morzh]

I second that about notching it back just shy of perfect with IF, found that out with Atwater Kent, though never saw it on PHILCOs.
Although I have yet to understand how this would result in howling when the volume is increased (with IF it is oscilation through feedback due to superhigh gain).


Also see if the volume wires are routed funny....missing wire shields (if any - have that on the Packard Bell)....and, last but not least, tubes do that too at times.