XLR shorting plugs... - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th April 2007, 03:05 AM   #1
batee is offline batee  United States
diyAudio Member
 
batee's Avatar
 
Join Date: Mar 2004
Location: Rolla, MO
Default XLR shorting plugs...

I'm looking for some shorting bars for XLR connectors. These are used in (some of) Nelson's amps to allow them to be run in unbalanced mode. Anyone know where I can find them (US suppliers)?

Thanks,

Bryan A. Thompson
bryan@batee.com
  Reply With Quote
Old 14th April 2007, 03:46 AM   #2
OzMikeH is offline OzMikeH  Australia
diyAudio Member
 
Join Date: Mar 2007
As in shorting the balanced line? Or shorting one leg to the ground pin?
I can only suggest buying some good quality metal bodied plugs and doing the required connecton using the plug.
  Reply With Quote
Old 14th April 2007, 04:07 AM   #3
batee is offline batee  United States
diyAudio Member
 
batee's Avatar
 
Join Date: Mar 2004
Location: Rolla, MO
Shorting one of the differential inputs to ground is what I'm after. I've seen some "U" shaped pieces of metal made for this app. Nelson mentions them in some of the owners manuals for his amps.

Thanks!

Bryan
  Reply With Quote
Old 14th April 2007, 04:40 AM   #4
cowanrg is offline cowanrg  United States
diyAudio Member
 
cowanrg's Avatar
 
Join Date: Apr 2002
Location: Lafayette, CO
Send a message via AIM to cowanrg
cant you just bend a piece of wire? get some solid core copper (romex?) and make a little U out of it?

you can also get some XLR plugs and wire them internally to do the same thing.
  Reply With Quote
Old 14th April 2007, 05:02 AM   #5
batee is offline batee  United States
diyAudio Member
 
batee's Avatar
 
Join Date: Mar 2004
Location: Rolla, MO
Yes, I considered DIY, but then I reasoned that it would look like a piece of bent Romex and gave up on the idea.

I went on to consider a piece of coat hanger, paper clips, a gum wrapper, a bent nail, and lastly a piece of garden twine. These worked (to varying degrees), but they still didn't provide the professional look that I wanted, so I gave up on them as well.
  Reply With Quote
Old 14th April 2007, 05:24 AM   #6
cowanrg is offline cowanrg  United States
diyAudio Member
 
cowanrg's Avatar
 
Join Date: Apr 2002
Location: Lafayette, CO
Send a message via AIM to cowanrg
i dont know what you are doing wrong, but making your own shouldnt look any different than a commercial one.

step 1, get some large guage copper wire (solid of course). cut and strip a length of it. maybe about 3 inches long.

step 2, using your fingers, pull it straight, so you get it as straight as possible.

step 3, using a pair of pliers, firmly grasp the wire about 1/3 the way up. firmly press the wire so that you bend it at a nice 90 degree angle. it should look like a right angle, not a smooth curve.

step 4, measure the distance from hole to hole on the xlr jack. position pliers so you can make another 90 degree bend, repeat step 3.

step 5, cut wire so both ends are the same length, so they are even.

step 6, use!

see picture. took longer to write this email. took about 30 seconds to make the jumper. (it looks uneven, that's just the angle of the picture).
Attached Images
File Type: jpg dsc01594.jpg (21.2 KB, 331 views)
  Reply With Quote
Old 14th April 2007, 05:29 AM   #7
cowanrg is offline cowanrg  United States
diyAudio Member
 
cowanrg's Avatar
 
Join Date: Apr 2002
Location: Lafayette, CO
Send a message via AIM to cowanrg
and installed....

(the wire was just what i had in front of me, you should probably use something just a bit thicker, but this would work just fine.)
Attached Images
File Type: jpg dsc01595.jpg (33.7 KB, 373 views)
  Reply With Quote
Old 14th April 2007, 05:35 AM   #8
batee is offline batee  United States
diyAudio Member
 
batee's Avatar
 
Join Date: Mar 2004
Location: Rolla, MO
I think the copper wire will oxidize pretty quickly, so I'm still going to hold out for something plated on the XLR shorting things.

Where did you get the tapered head screws to mount XLR jacks (the ones shown in your pic)?

Bryan
  Reply With Quote
Old 14th April 2007, 06:51 AM   #9
diyAudio Member
 
wuffwaff's Avatar
 
Join Date: Aug 2001
Location: Ingolstadt Germany
Hi,

it would be better to use XLR cables terminated on one side with a standard male plug, on the other side a cinch plug where you connect 1 and 3 to ground.
This way you have the advantage that the noise/distortion added by the cable is cancelled out.

William
__________________
een ooievaar is geen konijn want zijn oren zijn te klein!
  Reply With Quote
Old 14th April 2007, 04:24 PM   #10
cowanrg is offline cowanrg  United States
diyAudio Member
 
cowanrg's Avatar
 
Join Date: Apr 2002
Location: Lafayette, CO
Send a message via AIM to cowanrg
Quote:
Originally posted by batee
I think the copper wire will oxidize pretty quickly, so I'm still going to hold out for something plated on the XLR shorting things.

Where did you get the tapered head screws to mount XLR jacks (the ones shown in your pic)?

Bryan
i said specifically not to use that exact wire. if you get a plated wire, you will be fine. also, just dont touch the wire, and use some wipes on it, and it will be fine.

the tapered screws are pretty standard. i got them at www.microfasteners.com. they have nice hardware.

if you dont like the jumper idea (commercially made ones will be identical...), then get one of these:

http://www.partsexpress.com/pe/showd...number=092-309

and internally solder the pins.

the pass labs stuff has an rca and xlr, and you need to jumper the xlr to get the rca to work, right?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Shorting ring for B200 wooden phase plugs SAC Full Range 1 7th August 2009 06:34 PM
PPI plugs - the old flat speaker plugs jol50 Car Audio 0 21st January 2009 09:28 PM
XLR Shorting Plugs schodge Everything Else 2 25th February 2008 07:13 AM
xtr 2150 shorting out. 1armed1 Car Audio 9 20th April 2007 06:56 PM
Audiodigit T 100 shorting my sub? Mac Man Class D 2 14th July 2006 09:22 PM


New To Site? Need Help?

All times are GMT. The time now is 05:19 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2