[morzh]

The neutralizing procedure worked this time. With the bad tube with the open filament.
The sensitivity is good, many stations are pulled.
The hum - I realized I forgot about the R30, and when turning it, I was able to bring it down to very low level but it is very scratchy so I gave it a bit of Deoxit and will wait an hour before re-attempting it.

The distortion remains a bit, but looking at the detector, I think this is as good as it gets with this arrangement.

I think that's it, will put it back in the cabinet, maybe tonight.