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From: Phil Allison on 10 Dec 2009 20:21 "Krooburg Science" "Phil Allison" " Six fingered Ron" <r...(a)lunevalleyaudio.com> > > > > 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............. > 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. ** Of course - but that does NOT ground the XLR plug shell. I think you misread the comment. The SM57/58 would be one example of arguably the most common mics in the world. ** And one of the WORST culprits for losing ground on its own case - cos the case is only grounded by one tiny, reverse threaded screw that holds the XLR insert in the handle. Any rust or corrosion on the mating surfaces and there is no longer a ground connection. I'd be interested to know of any that float the shell for future reference though. ** The shell of the XLR plug can wind up floating (or intermittently floating ) with nearly all mics. That is WHY a shell ground terminal is provided in the female plug. ..... Phil
From: Arny Krueger on 11 Dec 2009 09:29 "liquidator" <mikeh(a)mad.scientist.com> wrote in message news:hfs0r3$l23$1(a)news.eternal-september.org > "Phil Allison" <phil_a(a)tpg.com.au> wrote in message > news:7odeniF3pivtqU1(a)mid.individual.net... >> You pathetic excuse for a BULLSHIT ARTIST !!! >> .... Phil > Best description of armi I have ever heard. Perfect examples of the sort of brainless bashing that keeps AAPLS from being a first rate forum. Getting back on topic, people seem to be missing the fact that all good shielding and grounding is designed to be effective against all of the kinds of EMI that are generally encountered, not just one kind of source. If your guitar picks up noise from a nearby fluorescent fixture or wiring, there is a general grounding and/or shielding problem. If you have grounding and/or shielding problems, fixing them will be effective against a wide variety of EMI sources. The last time I had a fluorescent lighting situation, that correlated with noise picked up by an electric bass, it turned out to be an electronically balanced input on an ADA8000 that stopped being balanced. Moving the mic cable from the DI box down one position and repatching the input fixed it instantly.
From: Arny Krueger on 11 Dec 2009 09:31 "Michael Dobony" <survey(a)stopassaultnow.net> wrote in message news:ggt9jrr78zip.5eu8jjlm41so$.dlg(a)40tude.net > DUHHHH! That's what I get for rushing. I looked at the > stage sockets too fast. Hot and ground are reversed!!! > Resolder time! As predicted, it was a generalized grounding problem.
From: Ron on 11 Dec 2009 09:44 Arny Krueger wrote: > "liquidator" <mikeh(a)mad.scientist.com> wrote in message > news:hfs0r3$l23$1(a)news.eternal-september.org > >> "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. > > Perfect examples of the sort of brainless bashing that keeps AAPLS from > being a first rate forum. > > Getting back on topic, people seem to be missing the fact that all good > shielding and grounding is designed to be effective against all of the kinds > of EMI that are generally encountered, not just one kind of source. Not all pro gear does have well designed shielding tho. If your > guitar picks up noise from a nearby fluorescent fixture or wiring, there is > a general grounding and/or shielding problem. If you have grounding and/or > shielding problems, fixing them will be effective against a wide variety of > EMI sources. Certain guitars are renown for picking up stray field - Fender Strat for example. there`s virtually no shielding around the pots and switch save for a thin bit of foil, the pickups are single coil and unshielded. Just standing close by your own amplifier will produce buzz. No amount of tinkering with the grounding on the amp or guitar lead will fix that > > The last time I had a fluorescent lighting situation, that correlated with > noise picked up by an electric bass, it turned out to be an electronically > balanced input on an ADA8000 that stopped being balanced. Moving the mic > cable from the DI box down one position and repatching the input fixed it > instantly. > >
From: Denny Strauser on 11 Dec 2009 12:19
Michael Dobony wrote: > On Fri, 11 Dec 2009 08:53:31 -0500, George's Pro Sound Co. wrote: > >> never use the female locking xlr's >> I have dozens of snakes now, i started with locking connectors and soon >> found what a PITA they are >> the occasional connection coming lose is not nearly the hgeadache the >> locking female xlr's cause >> George > > Thanks for the info. Since they need rebuilding anyway I will look for > non-locking XLR's. What is even more of a pain is the push button breaking off of the XLR-F connectors; then you need a tiny screwdriver to push the remaining piece of the button down to pull out the male XLR. If you can't find non-locking XLR jacks, you can remove the locking button by loosening the tiny set-screw that holds the XLR insert in the chassis mount, then remove the lock button. Now you'll have non-locking XLR's. -Denny |