This circuit with 4 transistors can receive signals in 6 shortwave bands. The circuit is from a Radio Electronics from May 1958. The output is for high impedance headphones.
This well-known configuration of the guitar effects pedal was obtained in an English magazine from...
This circuit was obtained in the National Semiconductor Linear Applications Handbook of 1994. The...
For -48 V voltages, this fast sensor was found in a 2005 Linear Technology application manual. The...