Rob Flinn said:I don't know what meter this pcb is designed to use, but the original units use a 200uA FSD meter.
Funny you are saying this : if I turn the Vu trimmers to have 5V at F points, Sounds opens up a bit and get louder a bit, but needle is pegged. If I go to 24V at F points, sounds get thinner and quieter, but needle move to the 1rst number of the scale. Always on that kind of 10khz HP sound.
Rob, did you get your unit working with edcors xsm 10k/600?
I have clamped XLR straight at the secondary of them and same issue, 10khz Hipass sound. Both Channels.