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The DiRaBox has already an integrated remote power supply & 470 ohms series resistor (see right side of the dashed line). This allows the connection of this simple active antenna circuit:

Simple active antenna (PDF-file)

The supply voltage is fed through the coax cable. The receiving range lasts from AM to FM (0.5 - 100MHz). Below 500KHz only reduced reception is possible.

Components:

1x BNC socket

1x Resistor 100K (1/16W)

1x Transistor BF494 or BF199

1x 30-50cm isolated wire (radiating element)

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