Unlike the previous circuit, the output of this one goes high in the window voltage range. The circuit is from Radio Electronics from June 1986 and is based on the CA3140.
The circuit consists of a MAT (Very High Voltage) oscillator that, applied to a protected metal...
A narrow range of frequencies around 1 kHz is rejected by the high Q filter shown in the figure,...
This transmitter circuit for the 27 MHz band uses 4 common FETs and has the details of the coils...