Denshi Board SR3A Components

Crystal Earpiece

Here are some photographs of the components specific to the SR3A kit. I thought they were extremely well made for a vintage kit such as this. The components all appear to be present and genuine and the photographs are useful as a reference. Although this vintage crystal earpiece appears to be similar to that available today, this one seems to be louder and clearer.

Loudspeaker

Loudspeaker

Speaker

Microphone

Microphone

Morse key

Morse key

The Morse key switch has a nice spring action and click, which is useful when tapping long messages very quickly. Your little whippersnapper will be tapping away spy messages to GCHQ well into the long hours of the night.

Probes

Probes

Wires

Wires

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Denshi Board SR3A
Denshi Block
Denshi Board
Denshi Board SR3A Blocks
Denshi Board SR3A Components
User Manual