Anyone know exactly what item # 10 was? Or #13??
Seems to be deleted from this drawing
#5 battery seems to be an afterthought
the output of the transistor has a dot at each end like maybe there were wires once connected there to what ever is missing..
Here is the other one where this time #10 has bee deleated
Not seen these before, it's difficult to make sense of it really, one thing Don liked using sometimes was a dual spark gap (A 3 pin Device) but this is a wild guess.
I think there is a tesla secondary grounded at one end missing there
Variable oscillator > HV transformer > DC pulse primary > ??? > Grounded tesla coil.
If ??? was a tightly coupled secondary with a sparkgap feeding the final coil you would have a Tesla Magnifying transmitter of sorts