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.
Originally intended to detect EMPs produced by tests or atomic blasts, this interesting circuit...
This circuit triggers a small water pump when the humidity detected by the sensor is reduced in a...
This circuit was found in Maxim's documentation from the 90's. The configuration uses components...