Thanks Herald!
I did, and valves seem to show continuity connecting to point C. Thanks for the advice.
So, in summary:
- snipped out C31, I got a replacement (0.022 uF instead 0.02)
- looking for a replacement for C28, the tone corrector, looks very bad and greasy
- R21 reported 255 Ohm
- R22 reported 952 Ohm
- no resistance could be measured in R24, seems faulty
- valves continuity seems OK
My best shot would be to replace C31, C28 and R24 so far...?
