'Gibson Girl' Crystal Radio

This series-tuned, shunt-fed crystal radio was built using parts salvaged from a vintage / battered SCR - 578 lifeboat radio (popularly referred to as 'Gibson Girl').

'Gibson Girl' Crystal Radio
It consists of a baseplate, antenna tuning coil, antenna tuning capacitor and a terminal strip modified to suit.

'Gibson Girl' Crystal Radio - Schematic
The only part required to be fished out from the junk box was a Schottky diode SB 860. It was mounted underneath the terminal strip.

The local 612 kHz, 200 kW AM broadcast station comes in real loud with a 60' wire antenna and sound-powered phones. Headphone current, measured using a 1mA FSD 60 Ω meter, is 750 μA.