fluorescent filter
in [Live Sound]
|
Prev: Rock the resort videos
Next: Interesting event
From: George's Pro Sound Co. on 10 Dec 2009 13:05 "Michael Dobony" <survey(a)stopassaultnow.net> wrote in message news:mpmdsh7jgv3y.18rp03liend6g$.dlg(a)40tude.net... > On Thu, 10 Dec 2009 09:24:49 -0500, gwatts wrote: > >> Michael Dobony wrote: >>> On Thu, 10 Dec 2009 01:36:18 -0500, Tim Perry wrote: >>> >>>> "Michael Dobony" <survey(a)stopassaultnow.net> wrote in message >>>> news:1hg9s8h0shgfc$.15vqv2bmnzvy$.dlg(a)40tude.net... >>>>> On Wed, 09 Dec 2009 19:59:01 -0500, Bob(a)kandystan.com wrote: >>>>> >>>>>> On Tue, 8 Dec 2009 22:50:17 -0600, Michael Dobony >>>>>> <survey(a)stopassaultnow.net> >>>>>> wrote: >>>>>> >>>>>>> What is the best way to filter fluorescent induced hum out of a >>>>>>> sound >>>>>>> system? I tried setting the FD manually to filter the offending >>>>>>> frequency, >>>>>>> but that is not working. >>>>>>> >>>>>>> Mike D. >>>>>> First, you need to find what equipment it is actually affecting... >>>>>> >>>>>> Unplug stuff starting from the inputs until the noise goes away... >>>>>> You >>>>>> could >>>>>> also try turning off lights as well... >>>>>> >>>>> Plugging a mic cable into the stage jack makes it hum. With a mic on >>>>> the >>>>> cable it gets worse. Silent without the mic cable plugged in. >>>>> >>>> Miswired cable? >>> >>> 6 different cables are doing the same thing, including 3 premium new >>> cables, Live wire Elite, Planet Waves (case shorted to ground), and >>> Mogami >>> Gold. >> >> >> Does the hum go away when the fluorescent lights are turned off? That >> hasn't been stated. If so, maybe their ballasts are polluting the AC >> line. > > Hum goes away when I turn the stage fluorescent light off. The rest of the > multitude of lights do not affect it. there is always a place to start first I would pull the jack and examine the wiring, next I'd reduce the system to speakers , amp(bypass everything, mixer, installed wiring, get to a point where there are no variables) and a line source(cd player would work) and add stuff to system until humm happens
From: liquidator on 10 Dec 2009 11:35 "Phil Allison" <phil_a(a)tpg.com.au> wrote in message news:7odeniF3pivtqU1(a)mid.individual.net... > You pathetic excuse for a BULLSHIT ARTIST !!! > > > > .... Phil > Best description of armi I have ever heard.
From: Phil Allison on 10 Dec 2009 19:32 " Six fingered Ron" <ron(a)lunevalleyaudio.com> >>> Mike Dope >>> 6 different cables are doing the same thing, including 3 premium new >>> cables, Live wire Elite, Planet Waves (case shorted to ground), and >>> Mogami >>> Gold. > > Btw, the shell of an xlr shouldn't be grounded to pin one. > ** Except in the case of the female plug that goes into a microphone. Cos otherwise the shell of the plug may not be earthed at all and hence become a source of noise when a person touches it. Buzzzzzzzzzz............. ...... Phil
From: Phil Allison on 10 Dec 2009 20:09 "Michael Dobony" > >> DUHHHH! That's what I get for rushing. I looked at the stage sockets too >> fast. Hot and ground are reversed!!! Resolder time! > > I just went down to rewire the connector and I see why I didn't catch it > the first time. Everything is over 1 post. Hot is on 1, cold is on 2, > ground is on 3. ** LOL - must be a bunch of old mic leads somewhere wired like that at the male plug end. So, with a correctly wired mic lead, the mics' signals were connected between pins 2 and ground ( at the mixer input) while the mic cable shields and mic bodies were wired to pin 3 - making them VERY sensitive to capacitively coupled noise. Amazing that it was quite usable like that with the fluoros off. Would not have been the case with any light dimmers in the vicinity. ...... Phil
From: Krooburg Science on 10 Dec 2009 20:10
On Dec 10, 4:32 pm, "Phil Allison" <phi...(a)tpg.com.au> wrote: > " Six fingered Ron" <r...(a)lunevalleyaudio.com> > > >>> Mike Dope > >>> 6 different cables are doing the same thing, including 3 premium new > >>> cables, Live wire Elite, Planet Waves (case shorted to ground), and > >>> Mogami > >>> Gold. > > > Btw, the shell of an xlr shouldn't be grounded to pin one. > > ** Except in the case of the female plug that goes into a microphone. > > Cos otherwise the shell of the plug may not be earthed at all and hence > become a source of noise when a person touches it. > > Buzzzzzzzzzz............. > > ..... Phil Not that I've opened up every model of mic that their is, it seems most have pin 1 bonded to the shell internally already. The SM57/58 would be one example of arguably the most common mics in the world. I'd be interested to know of any that float the shell for future reference though. K. |