Uniden grant amc location

[groundwire]

Sored this radio this morning at a garage sale for $5, OMG! Its completely stock untouched and works perfectly. Where is the amc control so i can bump up the am audio? Is it r131 like the cobra 148gtl?
This radio has the PC409AC board in it and mb8719 chip.

 

[NZ8N]

Change R130 from a 1.5k to a 1N4148 diode and a 500 ohm potentiometer. This will make it adjustable like in the 148 or Cobra 2000. I used to do this with Madisons that had the fixed resistor, and similar place in the Washington/142GTL radios.

see here for more details.

Cobra 148gtl r131 removal?