
VU Buffer and peak led schematic here
Assembly is the same as the original VU Buffer kit here
Disabling the rectifier for meter with internal rectifiers is also the same.

To Setup VU Buffer and Peak LED pcb.
1. Connect dc power you are using. VU buffer and peak led can run on +12 to +36vdc @ 30mA so main current draw will usually be the VU meter light.
2. Send 1kHz tone in at the reference level you want for the VU meter like +4dBM for example.
3. Adjust Trimpot marked VU for correct 0VU level for your system.
4. Send 1kHz tone in at the reference level you want for the Peak LED meter like +18dBM for example.
5. Then adjust trimpot marked LED until the LED just lights.
Note to set high peak levels than +18dBM or +18dBu a power rail of more than +12vdc will be needed.