[Mike L]

I'm stuck. Adjusting 11 and 15 has minimal effect. I literally have to put my ear next to the speaker to tune or hear a station. Here is what I have done lately:

Replaced all tubes, one at a time with no change.

Re-checked all voltages, all fall in line except that now the 2nd detector plate and screen  voltages are "bouncing" around. They are not stable. The plate is around 60 and the screen is around 34. I tried another tube with the same result, slightly different readings but still bouncing. Checked and rechecked all grounds, all were good.

If by chance I re-wound the feedback of the oscillator coil backwards would it receive stations at all?

Before rewinding the coils I had nothing, just low level hum. After rewind I'm receiving a few stations on the low side of the dial, nothing on the high side, but all very very low, barely can hear them. The volume control is always at max.