The Bearcat 3300XLT is the European version of the American BC250D. Slight differences exist between both scanners. The 3300 supports 8.33 kHz steps in airband. Both scanners canbe used to monitor EDACS en Motorola trunking networks.

There is not much space to mount an additional chassis plug for the discriminator output. I have modified the headphone plug to connect the discriminator signal, keeping the headphone signal available as well.

UBC3300XLT / BC250D

LND9 contains the basisband signal

The connection to LND9

The SMD resistor needs to be removed

The 10 k resistor, connected to the left solder pad

The scanner uses a stereo 3.5 mm headphone output. The middle contact is made available for the discriminator output. The SMD resistor (see circle) needs top be removed. A 10 k resistor is soldered to the left solder pad (see arrow). The resistor is fixed to the PCB by a little glue from a glue gun. The resistor's other lead is connected to the wire running from LND9.

Using a stereo 3.5 mm plug, the headphone signal is available between the tip and ground. The discriminator output is available between the middle ring and ground.