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Uniden Bearcat BC9000XLT / UBC9000XLT


Adding a discriminator output to a UBC9000XLT is rather straightforward. The scanner uses an MC3361 IC for narrowband FM. There is however no need to solder to this IC: the unfiltered audio signal can also be found at TP3

discriminator output
Chassisdeel in achterwand
Follow the next steps to make the discriminator output:
  • Install a 3.5 mm mono socket in the scanner's back
  • Solder a piece of insulated wire to TP3
  • Solder a 10 k resistor to the signal solder lug of the chassis socket
  • Connect the wire with the other lead of the resistor
As the metal housing of the scanner is connected to ground, there is no need to have a ground connection to the socket.
Chassis socket and 10 k resistor in the scanner's back

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