[morzh]

So again you found another #13 missing in another tube? It won't work without it.

Now in the sch you do have a 1000pF (0.001uF) cap there but it should not be across the #13, it is from K to Chassis. The #13 is in series with #36 and the latter is by passed by the switch 27 which I think is the distance switch (distant/local), and the cap is across both resistors.

Again, with no 13 the tube is not DC-biased and won't work.

If both are missing I wonder why.