This circuit was found in an 80's Poptronics. The circuit is a fast trigger whose signal can be taken from the Q2 collector. The supply can be done with voltages from 9 to 12 V.
This is a diagram of a 1958 commercial receiver. The circuit was found in documentation at the...
This circuit was found in the September 1974 issue of Radio Electronics magazine. It consists of a...
This circuit is in the SGS manual of linear integrated circuits of 1982. The integrated circuit is of...