|nosaj||10/8/2017 1:19 PM|
|studiomaster club 2000 182 mixer|
I got this mixer they were complaining about output dropping out. So I cleaned all the contacts.
During Testing the 48 phantom power was on and I had an ipod with xlr cable into the mic input well it smoke c1 and c2 causing lots of noise replace them . Vol is slighly lower compared to the other channels. But on gain know when it hit 60db(on the dial gets lots of noise, back knob off just a hair and sound is fine. No other knobs do this.) Is there something else I could have damaged?
input schem included[ATTACH=CONFIG]45231[/ATTACH]
|Leo_Gnardo||10/8/2017 1:56 PM|
Your ipod outputs are not balanced, furthermore don't need phantom to work. So ... you were shorting phantom to ground via cable adapters that do not magically turn an unbalanced signal into a balanced one.
Mixers that apply phantom to all inputs at once, drive me crazy = looking for trouble and they inevitably find it.
Although the phantom DC blocking caps C6 & C7 are rated 63V, I find caps used for this function often fail especially when phantom is misused, iow applied to unbalanced signal sources. Plugging, unplugging, and intermittent connections on the mic lines can apparently cause spikes in excess of the caps' rated voltage then they start leaking. I'd replace C6 & C7 with parts rated for 100V, see if that helps.
|nosaj||10/8/2017 3:38 PM|
Thanks so much.
Will have to start collecting the Rules like on NCIS.
|Leo_Gnardo||10/8/2017 4:03 PM|
Phantom going to the wrong places can also wreck the signal source. It would have been a shame if the ipod output was damaged.
Here's another for you & anyone else reading. If you have a phantom powered mic or DI, and it can also be operated by battery, remove the battery when you use phantom. Credit Tom Foehlinger at Clair Bro's, he taught me this one 30+ years ago. Tom was removing batteries from a bunch of brand new Countryman 85 DI boxes so I asked why. Phantom will try to charge the battery and the sound quality will suffer. Maybe some dual-power devices can deal with this but why take a chance.
|nosaj||10/8/2017 4:14 PM|
|Leo_Gnardo||10/8/2017 4:53 PM|
|Enzo||10/8/2017 5:59 PM|
|This will be Abby's last season. NCIS will have to hire ten people to do all the stuff she did. She's my hero.|