XLR to Minijack Repair
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From: Chris on 26 Mar 2010 15:25 On Mar 26, 7:42 am, Ron <r...(a)lunevalleyaudio.com> wrote: > On 26/03/2010 14:06, Dave Plowman (News) wrote: > > > In article<XK-dnZnmXt9eEzHWnZ2dnUVZ8g-dn...(a)bt.com>, > > Ron<r...(a)lunevalleyaudio.com> wrote: > >> The standard for XLR wiring is 1 ground, 2 hot, 3 cold. It wouldn't make > >> much difference if 2 and 3 were reversed as long as pin 1 was always > >> ground > > > It certainly would if using two mics close together...;-) > > Well yeah, on the other hand, two mikes close together may require the > polarity of one to be reversed. But lets not complicate matters <grin> > > Ron Any idea on what the impedance of the x-formers would be? Chris
From: Dave Plowman (News) on 26 Mar 2010 19:45 In article <8f23cd42-142f-47b7-883f-ac6869eefa2d(a)n39g2000prj.googlegroups.com>, Chris <christopher.maness(a)gmail.com> wrote: > Any idea on what the impedance of the x-formers would be? Usually something like 600 ohms to 50,000. -- *I wished the buck stopped here, as I could use a few* Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: Mark Allread on 26 Mar 2010 21:19
Dave Plowman (News) wrote: > In article > <8f23cd42-142f-47b7-883f-ac6869eefa2d(a)n39g2000prj.googlegroups.com>, > Chris<christopher.maness(a)gmail.com> wrote: >> Any idea on what the impedance of the x-formers would be? > > Usually something like 600 ohms to 50,000. > If nothing better comes up, you could probably get by with a resistor "H" pad attenuator for each channel of your audio. The four 1/4 Watt resistors can be fit into the XLR connector if you build it carefully. This won't provide ground loop isolation like a transformer, but it will bring your (0 to +8 DB) 600-ohm line-level audio source down to the approximately -15 DB, 50k-ohm home-entertainment audio standard. It won't help you with your XLR microphone-level audio, unfortunately. That starts out at about -50 to -60 DB at 600 ohms. You'd have to use a mic. to line level amplifier if you went with an attenuator, which is a bit inefficient and can bring up your noise floor. Not to say I haven't done it or that it didn't work pretty well. |