English Menubar Nederlandse versie Homepage News Order Information Order Frequently Asked Questions

UBC144XLT



The (U)BC144XLT uses the familiar MC3361 receiver IC (IC2). It's the DIL version, which makes connecting to pin 9 of the MC3361 fairly simple

Picture

Picture

The Uniden Bearcat (U)BC144XLT

Pin 9 of the MC3361 contains the unfiltered audio

Picture

The (standard) recipe to modify a scanner with an MC3361 receiver IC is:
  • Connect a 10 k or 12 k resistor to pin 9 of the MC3361
  • Connect a 2.2 of 2.7 nF capacitor from the resistor's other lead to ground, e.g. to the metal shield of the coil left of the discriminator IC

Close-up of the IC connection

Picture

  • Connect the inner conductor of a piece of shielded wire to the junction of the resistor and capacitor
  • Connect the braid to the metal shield of the coil
  • Connect the other side of the shielded cable to a 3.5 mm chassis terminal that you mount in the back of the scanner

Overview of the discriminator output



© 2003- 2017 discriminator.nl



Valid HTML 4.01 Transitional Valid CSS!

Map