This circuit generates signals for adjustments in FIs of 10.7 MHz. The transistors can be BC548 or equivalent. We found this configuration in a documentation from the 70s.
The purpose of this circuit, found in a documentation for radio amateurs in 1974, is to amplify noise...
Found in an Elektor from the 90s, this circuit simulates a rotary switch that provides a BCD...
Found in a 1970 American publication, this circuit uses transistors of the time. These transistors...