The BC355C / AE355M is a fairly recent scanner. From the outside, it looks like the COM217/BC700A, but internally it's completely different.

The scanner uses an NJM2552 receiver IC. The unfiltered audio can be found on pin 11.

BC355C / UBC355CLT

The unfiltered audio can be found on pin 11

10 k resistor connected to the via

Follow the next steps to make the discriminator output:

• Solder a 10 k miniature resistor to the via close to pin 11 of the receiver IC
• Install a 3.5 mm mono socket in the scanner's back
• Connect the resistor's other lead with the signal solder lug of the chassis socket (red wire)

The housing is connected to ground, so the chassis socket is grounded as well.

In the picture on the left, the resistor has been isolated using shrink tubing.