| Pro-520 XL |
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| Power Tweek and Modulation There are 2 ways that I found to work. 1) Cut or remove D14 which is the modulation limiter. Re-tune L4, L5, L6, L9 for maximum RF forward output. If the modulation is to much, do it this way: 2) Change the 2.7ohm resister in front of the final bias resister (15 ohm w/RF bead) to a .47 ohm. Re-solder or replace D14. Re-tune L4, L5, L6, L9 for maximum forward RF output. If you damage D14, you can use a 1N914 to replace it. VR1 Squelch VR2 TX Meter VR3 RX Meter VR4 RX IF Gain |
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