XLR modification

inteificio · 1st February 2005, 07:43 PM

I wish to modify my preamp to provide XLR outputs.

the only problem i have is i have no idea how to do it!!

Does anyone have any ideas?

I would need some basic instructions...preferably in crayon!

Thanks

Peter

phn · 1st February 2005, 08:09 PM

What, you want to go balanced? Try this link for very basic information. But if you want to balance your system, that's for the more knowledgeable guys here.

pinkmouse · 1st February 2005, 08:15 PM

What do you want to drive? There are several ways of doing this, some easier than others.

inteificio · 2nd February 2005, 05:56 PM

I have an RB-970bx preamp and a Rotel RB-991 power amp with pretty XLRs on the back...does that help?

inteificio · 2nd February 2005, 05:56 PM

I have checked the link phn. Interesting but unfortunatly it is about making the wires. I need to make the socket and manufacture something that will reverse the phase of one channel!!

joensd · 2nd February 2005, 06:08 PM

Hi,
here´s one simple way to do it with an opamp.
(You´d only need the transmitter in figure1)
http://sound.westhost.com/project51.htm

You could also have a look at the BOSOZ from Nelson Pass but then you could omit your whole preamp. (nice article(s) anyway)
http://www.passdiy.com/legacy.htm
(balanced zen line stage; which is a class a preamplifier)

greets

Netlist · 2nd February 2005, 06:11 PM

Have a look at Rod Elliott's pages: http://sound.westhost.com/
Under Projects->Preamps and Accessories.

/Hugo

phn · 2nd February 2005, 06:25 PM

"Crayon" kind of threw me. At least the other guys here dug up some interesting stuff. They always do.

leadbelly · 2nd February 2005, 07:42 PM

Judging by the tone of your post, it sounds like what is the easiest way to do it would suit your needs best.

So, IMO, forget individual op amps and discrete designs and use a single chip solution like the DRV134. This is from the datasheet:

inteificio · 2nd February 2005, 08:49 PM

Hmmm the advice i was looking for was:

Buy this circuit board.

Solder the wires here, here AND here...not there though that would be silly.

Connect the power to the unit HERE and HERE.

turn on enjoy!

Could anyone offer advice on that level.

Sorry for sounding stupid, but lets face it I need lots of help!

1st February 2005, 07:43 PM	#1
inteificio diyAudio Member Join Date: Dec 2004 Location: York	XLR modification I wish to modify my preamp to provide XLR outputs. the only problem i have is i have no idea how to do it!! Does anyone have any ideas? I would need some basic instructions...preferably in crayon! Thanks Peter

1st February 2005, 08:15 PM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	What do you want to drive? There are several ways of doing this, some easier than others. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

2nd February 2005, 06:08 PM	#6
joensd diyAudio Member Join Date: Dec 2001 Location: Germany	Hi, here´s one simple way to do it with an opamp. (You´d only need the transmitter in figure1) http://sound.westhost.com/project51.htm You could also have a look at the BOSOZ from Nelson Pass but then you could omit your whole preamp. (nice article(s) anyway) http://www.passdiy.com/legacy.htm (balanced zen line stage; which is a class a preamplifier) greets __________________ jens

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1st February 2005, 08:09 PM	#2
phn diyAudio Member Join Date: Oct 2004	What, you want to go balanced? Try this link for very basic information. But if you want to balance your system, that's for the more knowledgeable guys here.

2nd February 2005, 05:56 PM	#4
inteificio diyAudio Member Join Date: Dec 2004 Location: York	I have an RB-970bx preamp and a Rotel RB-991 power amp with pretty XLRs on the back...does that help?

2nd February 2005, 06:11 PM	#7
Netlist diyAudio Moderator Join Date: Jan 2003	Have a look at Rod Elliott's pages: http://sound.westhost.com/ Under Projects->Preamps and Accessories. /Hugo

2nd February 2005, 06:25 PM	#8
phn diyAudio Member Join Date: Oct 2004	"Crayon" kind of threw me. At least the other guys here dug up some interesting stuff. They always do.

2nd February 2005, 08:49 PM	#10
inteificio diyAudio Member Join Date: Dec 2004 Location: York	Hmmm the advice i was looking for was: Buy this circuit board. Solder the wires here, here AND here...not there though that would be silly. Connect the power to the unit HERE and HERE. turn on enjoy! Could anyone offer advice on that level. Sorry for sounding stupid, but lets face it I need lots of help!

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