This is the circuit of a modified Heathkit kit. The circuit was found in a Radio Electronics from December 1965. The author of the circuit included improvements to the original circuit.
This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave...
This two-channel bargraph meter uses a single KAA2281 integrated circuit. Found in the January 1991...
This circuit allows to increase the output power of a 741 as an amplifier. The circuit is from a...