TLS to XLR

Archived from groups: rec.audio.tech (More info?)

Hi All,

I want to make a patch cable. I am trying to go from 3.5mm stereo jack to
XLR keeping the stereo separation. My input destination is XLR audio
connectors on the rear of a camcorder x2. First question, in order to retain
the separation, will I need two cables from the TRS?.

I understand the pin connections are;

1. sleeve, 2. tip, 3, ring. Is this combination the same for left
& right stereo channels or would they change depending on which channel is
being wired?.


Thanks for any suggestions.


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Archived from groups: rec.audio.tech (More info?)

"Art Jackson" <nospam@ringading.buz> wrote in message
news:4Ddsc.11717$Sc.9545@bignews1.bellsouth.net...
> Wing Commander wrote:
>
> > Hi All,
> >
> > I want to make a patch cable. I am trying to go from 3.5mm stereo jack
to
> > XLR keeping the stereo separation. My input destination is XLR audio
> > connectors on the rear of a camcorder x2. First question, in order to
retain
> > the separation, will I need two cables from the TRS?.
> >
> > I understand the pin connections are;
> >
> > 1. sleeve, 2. tip, 3, ring. Is this combination the same for
left
> > & right stereo channels or would they change depending on which channel
is
> > being wired?.
> >
> >
> > Thanks for any suggestions.
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.690 / Virus Database: 451 - Release Date: 22/05/04
> >
> >
> If I understand you correctly, you are wanting to connect a single
> stereo mini jack output on some device to separate balanced XLR
> microphone inputs on your camcorder.
> You will need a transformer to couple the unbalanced outputs on the mini
> jack, to the balanced XLR inputs. Probably the XLR inputs are female on
> the camcorder. Radio shack sells such a transformer, (274-017). They
> also sell adapters and cables to complete the hookup. 274-369 single
> stereo 1/8 inch mini plug adapts to two RCA Phono mono jacks. Then two
> cables (6ft. RCA plug to 1/4 inch plug, 42-2373) to go between the
> adapter and the transformer 1/4 inch mono input jack. Hope that answers
> your question. Good luck.
>
>
> --
> Art Jackson W4TOY Owensboro, KY USA
> Life is God's open book test. In order to pass,
> you must open His book to find the answers.

Thanks for the suggestion Art. I was hoping to be able to wire directly from
the 3.5mm TRS to XLR as the TRS is linked to a microphone and I need to be
very mobile.


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Archived from groups: rec.audio.tech (More info?)

Wing Commander wrote:
> I want to make a patch cable. I am trying to go from 3.5mm
> stereo jack to XLR keeping the stereo separation. My input
> destination is XLR audio connectors on the rear of a camcorder
> x2. First question, in order to retain the separation, will I need
> two cables from the TRS?.

It appears that you have a stereo mic with "mini-phone" (3.5mm)
output and you are trying to plug it into a camcorder with two
XLR inputs. Is that correct?

I have some diagrams online that show the opposite (connecting
XLR microphones to consumer camcorders with 3.5mm TRS
mini-phone.) http://www.rcrowley.com/CamAdapt.htm
You could use the same wiring scheme in reverse. You may
not need the capacitors if you don't have phantom power to block.
OTOH, you may need 50 volt capacitors if you have 48v coming
out of the XLR inputs.

Of course, this is not substitute for a professional unit using
transformers, etc. But if you need something small and light,
it may be your most viable alternative.

Archived from groups: rec.audio.tech (More info?)

Wing Commander wrote:
> "Richard Kuschel" <rickpv8945@aol.com> wrote in message
> news:20040524092142.06424.00001274@mb-m25.aol.com...
>
>>>I want to make a patch cable. I am trying to go from 3.5mm stereo jack to
>>>XLR keeping the stereo separation. My input destination is XLR audio
>>>connectors on the rear of a camcorder x2. First question, in order to
>
> retain
>
>>>the separation, will I need two cables from the TRS?.
>>>
>>>I understand the pin connections are;
>>>
>>>1. sleeve, 2. tip, 3, ring. Is this combination the same for
>
> left
>
>>>& right stereo channels or would they change depending on which channel
>
> is
>
>>>being wired?.
>>>
>>>
>>>Thanks for any suggestions.
>>>
>>
>>It won't make any difference as long as you keep your system straight.
>>
>>TRS stereo is usually , but not always: Tip =left; Ring= Right; and the
>
> only
>
>>thing that is constant is that Sleeve= pin 1 = Ground.
>>Richard H. Kuschel
>>"I canna change the law of physics."-----Scotty
>
>
> Thanks to both Richards. I will now go away and attempt to use a soldering
> iron.
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.690 / Virus Database: 451 - Release Date: 22/05/04
>
>

No guarantee that it won't cause hum or other problems, but it's worth a
try. Connect a shield wire from the mini TRS end shield to pin 1 of
each XLR, strap pin 1 to pin 3 in each XLR plug, then run the lead from
Tip of TRS end to pin 2 of one XLR, and Ring of TRS end to the other XLR
pin 2.

TRS
T------------o 2

XLR-Left
___________o-o 1&3 strapped
S<___________==========
o-o 1&3 strapped

XLR-Right
R------------o 2






--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.