[Mondial]

There are only two adjustments on the discriminator transformer, 85A and 85B. 85A is the primary and 85B the secondary. There is no movable core as 85B is an air variable trimmer where the hex and screwdriver slot are the same shaft.

The Philco alignment procedure is a bit confusing, setting for minimum audio output and then maximum. What you are really trying to do is to maximize the signal on the secondary of the discriminator transformer with 77A and 85A adjustments and then setting the secondary 85B for a zero voltage at the defeat switch terminals when a strong signal is exactly tuned in.

I don't recall the exact voltages at the defeat switch, but each side should swing + and - at least 3 to 5 volts as you tune across a strong signal.

If you have a scope with a low capacitance probe, you can look at the IF signal at the plates of the 6H6G tube. You should see an RF signal there when a strong signal is exactly tuned in. Adjust 77A and 85A for max signal on the scope. which should get you into the ballpark. Then disconnect scope and adjust 85B for zero voltage on both sides of the defeat switch.