'Gibson Girl' Crystal Radio

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

The SCR - 578
It consists of a baseplate, antenna tuning coil, antenna tuning capacitor and terminal strip modified to suit.

'Gibson Girl' Crystal Radio
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.

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

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