This modulator amplifier for transmitters was found in a 1947 American book. The circuit uses an output with 4 tubes connected in parallel and in push-pull.
This circuit allows the measurement of resistance in the megohms range using an indicator LED and...
The purpose of this circuit is to enable the car or motorcycle starting system only for a certain...
With this circuit it is possible to receive signals in the 2 m (150 MHz) range on a pocket AM...