Pin numbers are read from the bottom clockwise. # 1 will
be the first one AFTER the gap or key.
The filament runs off the flyback not the regular string.
All of the HV stuff is running at 16 KV above ground so you need
20 KV or more wire. After that flexability helps. The anode lead
can be stripped if almost any junker. The 1 K resistor should be
carbon also. If you restring the filament try to keep it the
way the old one is.
73 Zeno
LFOD !