Biased crystal set
This set contains details of how the biased crystal receiver was constructed and the performance achieved using a 10ft inverted 'L' antenna.


1 x polycon variable capacitor.
1 x crystal earphone
1 x 3M3 resistor
1 x 1N4148 diode
1 x dpdt toggle switch
1 x jack socket
1 x AA battery holder
2 x terminals
2 x solder tags
3 x 2.5mm screws
Enamelled wire 50ft
Insulated wire 600mm
These parts are available on the KRC website
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