[Davidra]

Looking at the voltages...most seem OK to me. Like, the audio 27 grid is connected (the tiedot is not visible) to Rect neg (centertap) via 24 resistor 1M value. That will make it negative.
The second detector plate voltage is always much higher than what results from checking it with a DMM. Its grid indeed should be positive to filament and zero more or less to Chassis: -4V I cannot explain, needs to be re-measured.
Etc.

Thanks to all for their help. I will re measure using filament voltages for the negative side and try some signal tracing/injecting. 

David
PLANO, Texas