Uniden Bearcat USC230![]() The USC230 is almost similar to the UBC72XLT. The unfiltered audio can be found at LND7. There is one difference: the USC230 has two pushbuttons on the side, leaving not too much space for an additional socket. I have modified the headphone socket to connect the discriminator signal, keeping the headphone signal available as well.. USC230
![]() ![]() LND7 contains the unfiltered audio
This resistor needs to be removed
![]() 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 to be removed. A 10 k resistor is soldered to the right solder pad. The resistor's other lead is connected to a wire running from LND7. 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. Overview of the discriminator output
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