Power Issue

[frederic]

Re: Just a joke..shiii

Actually Velvet Elvis, so is mine, I just don't like any cords on the floor. Thats all.
fitz

Im totally with you in this regard. My goal is to have zero wiring on the floor or the ceiling, and have it all buried in the walls (or cable troughs). I have a friend who has an awesome studio as far as gear and acoustics, however the floor is a disaster. I'm not sure whether he has cabling or pythons on the floor anymore.

Its amazing how people can actually be effective in such a mess.

 

[Velvet Elvis]

Guys,

I do indeed have NEW GFI circuits in my kitchen and my bathroom... however, I've found the GFI circuits actually ADD noise to the signal. Disabling those circuits at the breaker box, and connecting the studio to a different (grounded of course) circuit yielded the least amount of noise, but there was still noise to be heard.

I am plugged into a grounded outlet.

I've tried both double and single coil pickups... not much difference.

I've tried "hum busters" to no avail.

The power amp to the recording board is not the cause of the issue. I can hear the same hum on headphones with the power amp unplugged completely.

Not really sure WHAT the problem is... but it sure is annoying. And its making it hard to get a project done for our record company.

YIKES!

Velvet Elvis

 

[knightfly]

Make sure there are no "wall warts" within 3 feet of any audio cables and that speaker leads aren't parallel to any power cables - other than that, unplug EVERYTHING into the mixer (or was this when you still heard the hum?) If the hum is gone, start plugging things back in one at a time. When the hum comes back, leave the last thing plugged in and unplug the others - hum still there? That's the culprit. Hum not there? Ground anomaly between that item and something else. Play with combinations til it's down to two, try a DI box with ground lift on one or the other...

Also, how old is your mixer? Power amp? Sometimes the electrolytic caps in power supply filters get dried out over time, less capacitance means worse filtering, hummmm... This would show up with just the mixer and power amp in circuit.

Sometimes, all you need is more chicken blood... Steve