Copper Talk » Subscriber (Preview) » Tips and Tricks » Voyage VR9000 NPC-RC Modification » Review » Step 3 « Previous Next »

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Posted on Tuesday, November 13, 2001 - 12:04 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Step 3

Voyage 9000 Modification


Disable On Board Automatic Modulation Control


With the radio component side up, knobs facing you

Look near the center and REAR of PCB

Locate resistor R249 (10K ohms) Color Bands are Brown, Black, Orange

pic8.jpg

Un-solder one wire leg of the resistor and lift it out of it's mounting hole. This disables the onboard AMC circuit built into the radio circuit. This does NOT mean that your radio does not have an active AMC circuit. The NPC-RC modification IS a modulation modification circuit in itself . It controls both the positive AND negative audio peaks so they don't clip and distort the waveform while still maintaining a very high level of CLEAN modulation.


Next we will Adjust the Driver Transistor Bias current