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 9-pixel circuit has been implemented with 9 LDRs and can be coupled to a processing system for...
We found this circuit in Harris' 90s documentation. The circuit applies to modern operational...
This circuit was found in an English publication in 1986, but it can still be implemented by...