#824826 - 02/11/09 06:21 AM
possible vs 2400 channel blow??????
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christian666
Space Cadet
Registered: 01/13/09
Posts: 7
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i know it seems i've been busy here,but i think its great that you can hear others peoples,,advice/mistakes,,,etc. i've bought a new lcd mic and realized after about an hour of use on drums that its got this C sharp frequency to it,checked a different channel and it had it also,checked cable,still there.i first had it in channel 8 and then moved to channel 7,left my studio.now at home i'm thinking could it be that i've BLOWN channel 8 and 7 is linked to it ???? otherwise i've bought a broken nuemann u87. any info guys ?????
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#824828 - 02/11/09 07:16 AM
Re: possible vs 2400 channel blow??????
[Re: christian666]
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horstay
Planeteer
Registered: 02/03/05
Posts: 197
Loc: south bavaria
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I cannot believe, that you can blow a channel with a mike.
Once I blew a channel of an analogue mixer, but with 220 volts coming in from a defective drum machine Some conducting paths were melted away, I was able to repair it ...
Don't you have the possibility to test this mike on other mixers - other mikes on your VS? I'd try it. Wish you good luck for this
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#824884 - 02/11/09 12:59 PM
Re: possible vs 2400 channel blow??????
[Re: horstay]
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gigpigs
Planeteer
Registered: 08/29/06
Posts: 1372
Loc: Nashville
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You don't have the blue guitar button pushed in on ch 8 do you? Just a thought. Check the "input" mixer to see if any effects or eq is on. Make sure all aux's are turned off in both mixers. Place a simple hand held dynamic into ch 8 and make sure the pre's work. Sounds like somethings not set right. Is the pre (trim) set counterclockwise on ch 8. Check the routing and make sure phantom power is "off" for ch 8. I think you'll figure it out. Good luck, Ron
_________________________
VS-2400CD, 17" LCD, Roland Powered Monitors, USA Les Paul Standard Goldtop, Yamaha Motif 7 keyboards, Fender Hot Rod Deluxe Amp.
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#825141 - 02/12/09 01:17 AM
Re: possible vs 2400 channel blow??????
[Re: gigpigs]
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christian666
Space Cadet
Registered: 01/13/09
Posts: 7
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checked the channels again with a akg 414,and the the channel is'nt blown its just making this pretty healthy hum,,,around a Csharp i think.all the channals do it,,,never noticed it before,,,you see i've just relocated to do some lacation recording...i also am running four high end mic pre's,two are running phantom and there does'nt seem to be any hum from these.i think it could be the house,,but then why does'nt the mic pre with phantom have the hum?????? wish i paided more attention in physic's class
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#825204 - 02/12/09 09:21 AM
Re: possible vs 2400 channel blow??????
[Re: christian666]
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horstay
Planeteer
Registered: 02/03/05
Posts: 197
Loc: south bavaria
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Did you also try different cables? I think you already did
Normally it's more likely to catch hum with connected outboard, via ground loops. That it's the other way round in your case, that's really weird.
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#825289 - 02/12/09 04:45 PM
Re: possible vs 2400 channel blow??????
[Re: christian666]
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Bobkat
Planeteer
Registered: 01/23/08
Posts: 1206
Loc: St. Marys,Ontario,Canada
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Try plugging into an APC power bar or a power conditioning unit and make sure there are no fluresent lights on close bye.Just a thought!
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#825502 - 02/12/09 10:45 PM
Re: possible vs 2400 channel blow??????
[Re: Bobkat]
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Arson Dan
Planeteer
Registered: 09/16/03
Posts: 282
Loc: Vancouver, WA
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When you are chasing down hum or ground loops, sometimes you have to disconnect everything and add them back one at a time until the hum presents itself...sort of a process of elimination. Start with the VS2400 itself...is it grounded? Are you SURE your studio electrical system is properly grounded? If it is, then see how all your input settings are..whether or not the preamps are jacked way up or not....try them at 3/4 or full volume and see how noisey they are. Maybe you have an effect turned on with some compression on? Check everything. Second...check each additional piece of equipment..your other pre's, etc. Check the connecting cords for bad shielding or grounds..and keep the analog audio away from other cords, like power cords, high frequency cables, etc. If your analog ables MUST cross paths, try to cross them at a 90 degree angle to minimize cross-talk/interference. When connecting some equipment you may have to 'lift the ground' of one or more of them..usually accomplished by using a direct box ( DI ) and flipping the ground switch. I have a syntesizer that requires this method...otherwise it has a lot of parasitic noise. Fighting hum can be a simple problem of keeping your audio levels up to a decent level BEFORE they get to the recorder or other downstream equipment. If the level is too low, any amplifying of the signal later will also amplify to noise level. Keep your levels up, in otherwords. I hope you find your hum and get it dialed out okay! It can be a real pain to find, sometimes. Good luck
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#827806 - 02/18/09 12:33 AM
Re: possible vs 2400 channel blow??????
[Re: Arson Dan]
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christian666
Space Cadet
Registered: 01/13/09
Posts: 7
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hey there guys,,,been out at my studio space,,,humming away still.tomorrow's the day i'll sort this out..gonna star with just the roland and,,,,,like you said Arson Dan,add on one by one all thats connected now,,,it seems to be just the the channels with phantom power that are the hummer's.i left the input level on the channel up and added a d.i. box,,this stopped the hum alright, but can i use this to go between the mic and console(as a earth lift)or will it screw up the mic??? oh! just in case you think i is lazy<<<i'm gonna make sure all cables are not crossing unnecessarily,unplug the pre's etc.. i really appreciate all your feed back,,,it is very annoying not to able to get to the bottom of this straight,but i know when i do,i'll have got my head around this larky,, again thanks all. christian
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