Modifications

Uniden PRO-500D,PRO-510XL,PRO-520XL
POWER TWEAKS


1. Locate the 2.7 ohm resistor in front of the final bias resistor(15 Ohm w/RF bead) and change it to a .47 Ohm. (DO NOT change the 15 Ohm resistor!!)
2. Re-tune L9,L6,L5,L4 for maximum forward power.


MODULATION

Cut D14
AM POWER: L6,L5
VR1: Squelch
VR2: TX meter
VR3: RX meter
VR4: RX IF gain


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