Wiring an xlr jack in a pedal-- Help!

[K3vin]

Hi,
Does anyone know how to wire an xlr jack into a pedal instead of the output jack? My friend wants me to do this for him because its a pedal he uses for acoustic and he wants to run it straight into the board.  Thanks!

[Jazznoise]

You could just make a jack-XLR lead, but using a socket is fine too! Going to assume it's an unbalanced system and say connect your ground to 1 and 3 and your signal to 2.  If you're using a female XLR socket you'll have to swap 2 and 3 though.

If you get lost there's plenty of information on this availible with a google search. Like this! http://www.scotaudio.com/wiring.htm

[Mike Burgundy]

XLR: Xternal, Live, Reverse.
So pins 1-3 are shield (ground), signal (+) and reversed signal (-) in that order. The - can be connected to ground for unbalanced lines. There's no real reason to use an XLR without using balanced lines, so it might be a good idea to include some extra electronics as a balanced line driver. Plenty of info to be found on those - GEO, eliott sound, for instance.
That said - easiest solution is using a short J-J cable to a DI box and run that to the desk. Balanced lines to the desk, no worries about fitting it all into an existing box, no hassle.

[K3vin]

thanks

[jaman]

Hello,

could you please give me some more information, on what kind of circuit should I add in a pedal in order the signal to continue to be balanced ?

Where should I look in GEO ?

thanks a lot !

[twabelljr]

You will probably need to research direct injectors and copy their output stage. You need to add circuitry to invert your output signal so you will have a + signal, a - signal and a ground. look at the end of this project and integrate it into the link you read above. http://books.google.com/books?id=84-CnYOdYFMC&pg=PA48&lpg=PA48&dq=craig+anderton+iggy&source=bl&ots=78q5cz9xFJ&sig=F7qRCF0U-hvOaHQ_6-KDH--NdN4&hl=en&ei=AdBATeHZJcG_gQfUqYSpAw&sa=X&oi=book_result&ct=result&resnum=2&ved=0CB0Q6AEwAQ
You will have to buy the book to get all the projects but I think the schematic in project 9 shows what you need, at the end of the circuit. I recommend buying both Craig Anderton guitar project books.

[jaman]

i couldn't find any circuit in the link you sent me,

the book seems interesting, but I have to order it and it will take long...

is there any schematic of the circuit i should add in the input and the output of the pedal, to work with balanced signal ?

thank you !

[familyortiz]

http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=44267

Here is my balanced line driver, from the Gallery. You can wire in just the output stage using an Analog Devices SSM2142. The pedal power supply will probably be 9V single ended, and biased at 4.5V to created pseudo ground, I am guessing, which can be used in place of the +/- 12V that I used. It is extremely easy to wire in this balanced output and it is dead quiet.
Here's the datasheet for the chip:

http://www.analog.com/static/imported-files/data_sheets/SSM2142.pdf

[jaman]

Thanks !!

so, that's what I can put in the output of the pedal,

what about the input ? is there something similar ?

what I want to do is : el.bass (with XLR output) -> chorus mono pedal -> DI etc...

So I would like both input and output of the pedal to be XLR balanced.

[familyortiz]

Yo Jaman,
  I am not fully understanding exactly what you want, but I am guessing that this is what you would need at the input:

http://www.analog.com/static/imported-files/data_sheets/SSM2141.pdf

No surprise, it's the complement of the SSM2142 balanced driver, mentioned earlier. Probably just as easy to try out.     Have fun, M.O.

[boogietube]

Please PM me your e-mail address. I have a complete solution for your problem.
Sean

[twabelljr]

i couldn't find any circuit in the link you sent me,

Huh. That's strange. Should be able to click the link and scroll down a bit to project #9, "Beat the DI Blues with Iggy". The schematic is on page 50. Sorry if it doesn't open for you the same. Seems like you got some good help now. Hope to hear a success story soon! Good luck!

[Mike Burgundy]

@ twabelljr: No preview available for me either. Mught be they changed it, might be it's a nationality thing.
Good book to have though.

Eliott Sound Products (ESP - google) has good stuff on DI's and lots more too.
GEO (both search and google are once again your friend) is www.geofex.com