I know shipment itself doesn't cost that much, but believe me, customs clearance does (there's a 100% package stop rate from/to USA & Canada here, and they make you pay for the package inspection - seriously, fuck Italy). Back to technical stuff - if I got that right, I hadto feed a signal into the filter, attach one clamp of the oscilloscope to left & right pins of notch balance pot. Here's what I measured:negativspace wrote:It's ~$15 to ship one of these things from here to Italy, I've done it more than once. Surely Italian airmail isn't $85 for a 12oz package.sromanel wrote:I don't think it'll be worth the shipment price, we're talking about almost a hundred euros send+return. I've had it checked by a synth repairman, there was a faulty trimmer (6V IIRC) but that didn't change much. HP works just fine, the only problem is with notch out. He even changed all SMD components, but with no luck. Is there any measurements I should do in order to understand a little bit of what's wrong?
Anyway... if you *do* have a HP out then there is only one possibility for the fault and that is somewhere in the SMT/notch balance pot/jack "subsystem." Try probing the CW and CCW pins of the balance pot with a patch cable just to see if there's a signal on either, and we can work backwards from there. A photo might also help, otherwise I'm just taking blind guesses.
6V trimmer will only have an effect on the mixer section, that rail is not used on the filter side.
Sine in, fully CCW balance
Sine in, fully CW balance