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.
Suggested by National Semiconductor in a documentation of the 90s, this circuit uses a power...
This circuit was obtained from an American 1980s documentation. The frequency depends on the...
The sensor of this circuit is a large surface diode. We believe that a small solar cell can also...