This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine....
This very simple continuity tester uses a small 1.5 V lamp (type used in flashlights). Can be...
This commercial radio with 3 earphone listening transistors was manufactured in Japan in the...