This circuit is from a Radio Electronics from March 1970. The crystal depends on the frequency at which the signal is to be captured and the resonant circuit determines the tuned band.
This crowbar protection circuit for non-regulators blows the fuse when the load voltage exceeds a...
This general-purpose transistor amplifier stage was found in the November 1993 issue of...
This circuit was found in an old British publication from 1976. It must be powered with 5 V and...