This is an amplifier circuit intended for modulating transmitters. The 5-tube circuit is from an American manual from 1947. The power supply uses a transformer.
The RCA integrated circuit used in this control is uncommon today. The circuit is from an...
We found this circuit in a Popular Electronics of the 90s. The circuit uses a touch sensor formed by...
We found this circuit in a European schematic from the 90s. The used integrated circuit can still...