This circuit uses grid-block keying, and all components, with the exception of the values of tuned circuit components, are shown on the schematic. Power input should not exceed about 150 watts. Adjust voltages and loading for best keying. The plate circuit would then be tuned to twice the grid circuit frequency. This should provide much better stability.
Experimentation is in order.
Otherwise the screens may disappear in a blinding flash of light. This circuit should feed a good antenna coupler. I will post pictures and a better description when I have done so. From schematics of other regenerative receivers I have recently seen, this same basic circuit can be used with two separate triodes, or a tetrode or pentode as the detector stage. A 12AT7 should also work quite well in this circuit.