Attached is a Graymark 515 circuit. Variation of the WB with a neat
stacked approach. More power? Could modify the screen grid
resistor/ voltage a bit I suppose. Or increase B+ somewhat with a
safer and better power supply.
The circuit for the 515 needs to be modified just slightly. The 27
ohm resistor should feed both the diode and the tubes so that the
filament voltages are not exceeded.
Have never seen the Graymark up close and personal, just have schematic
Thanks to C.R."Ron" Lawrence, KC4YOY for
Since High Voltages
are used, these transmitters should only be built by experienced people,
or under the supervision of experienced people.
In Reality... DO NOT ATTEMPT TO USE THIS WITHOUT
AN ISOLATION TRANSFORMER AS FATAL ELECTRIC SHOCK CAN TAKE PLACE.-