Quote:
Originally Posted by wa2ise
Oh, it can sometimes seem that way... And can get quite fustrating. Thing is, one small error can be the cause, and people can be their own worst proofreaders, as they become blind to their own errors. I would avoid extensive modifications to Phil's circuit, if it never worked for you. That usually leads to additional fustration. Maybe one of us who lives nearby can pay you a visit. Not me, though, I'm in NJ.
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Dang, you are right amigo. And i am wrong for coming up with an alternative circuit that obviously doesn't work. I need to apologize profusely for the wild goose chase. Upon visiting Phil's schematic, the circuit depicted is obviously the correct one, once the tube internals are added to the tube symbol.
http://antiqueradio.org/transmitter.htm
Oh man. Sorry as hell.
The cathode (pin 8)
should be grounded as it was originally.
The C5/C6 junction
does go to lug# 1, not lug# 4.
All else remains as it was.
One thing that's still puzzling though, the resonant tank caps (C6a, b, and c) are now in parallel with the low impedance coil winding, whereas in seems like they should parallel the high impedance winding (as was the case in my "alternative" circuit).