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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: insanescott on March 23, 2007, 06:17:45 PM
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I am currently trying to build a 2 wire battery box to a Dongle for my Microtrack. I built a 2 wire battery box several months ago and recently I got some information on how to build a MT Dongle. I spliced the output wires of the battery box into left, right and ground. I connected the ground to each 1/4in plug on the Dongle end of the box. Also, I connected the left from the battery box to the left 1/4in plug and the right to the right 1/4in plug. For some reason my left and right tracks are linked and are just producing a mono signal from both mics. Both mics are coming in both ears. I have included a really simple diagram of what I have done below. If anyone can help I would really appreciate it, because I have been pulling my hair out for days and don't know where to go with here. I believe that I am hooking my grounds incorrectly. Thanks in advance for any help.
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doube check to see if you've shorted something. too much solder in one area maybe?
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The "-" wire should go to the "sleeve" of the 1/4" connnector.
The "+" wire should go to *both* the "ring" and the "tip" (ie., they are shorted together) for unbalanced input.
Richard
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I am currently trying to build a 2 wire battery box to a Dongle for my Microtrack. I built a 2 wire battery box several months ago and recently I got some information on how to build a MT Dongle. I spliced the output wires of the battery box into left, right and ground. I connected the ground to each 1/4in plug on the Dongle end of the box. Also, I connected the left from the battery box to the left 1/4in plug and the right to the right 1/4in plug. For some reason my left and right tracks are linked and are just producing a mono signal from both mics. Both mics are coming in both ears. I have included a really simple diagram of what I have done below. If anyone can help I would really appreciate it, because I have been pulling my hair out for days and don't know where to go with here. I believe that I am hooking my grounds incorrectly. Thanks in advance for any help.
I am sure you already know this but I just want to make sure. What ever you do if you run your microtrack with the 1/4 inch inputs "unbalanced" as Richard sugested make sure you never turn the phantom power on! :)
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I am currently trying to build a 2 wire battery box to a Dongle for my Microtrack. I built a 2 wire battery box several months ago and recently I got some information on how to build a MT Dongle. I spliced the output wires of the battery box into left, right and ground. I connected the ground to each 1/4in plug on the Dongle end of the box. Also, I connected the left from the battery box to the left 1/4in plug and the right to the right 1/4in plug. For some reason my left and right tracks are linked and are just producing a mono signal from both mics. Both mics are coming in both ears. I have included a really simple diagram of what I have done below. If anyone can help I would really appreciate it, because I have been pulling my hair out for days and don't know where to go with here. I believe that I am hooking my grounds incorrectly. Thanks in advance for any help.
I am sure you already know this but I just want to make sure. What ever you do if you run your microtrack with the 1/4 inch inputs "unbalanced" as Richard sugested make sure you never turn the phantom power on! :)
Oops! I got it wrong.
It should be:
gnd(-) goes to: sleeve and ring (shorted), and (+) goes to *tip*.
Yes, I'm not sure what phantom power will do, but many "mono" 1/4" plugs, like guitar cables, etc, have sleeve and ring as a single metal piece, ie., shorted.
You could also just use mono plugs for this mic input too.
Good luck with your project.
Richard
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I am currently trying to build a 2 wire battery box to a Dongle for my Microtrack. I built a 2 wire battery box several months ago and recently I got some information on how to build a MT Dongle. I spliced the output wires of the battery box into left, right and ground. I connected the ground to each 1/4in plug on the Dongle end of the box. Also, I connected the left from the battery box to the left 1/4in plug and the right to the right 1/4in plug. For some reason my left and right tracks are linked and are just producing a mono signal from both mics. Both mics are coming in both ears. I have included a really simple diagram of what I have done below. If anyone can help I would really appreciate it, because I have been pulling my hair out for days and don't know where to go with here. I believe that I am hooking my grounds incorrectly. Thanks in advance for any help.
Can't tell for sure from your wiring, but make sure the audio common for both left/right channel pickups are also connected to common ground as with the minus (-) terminal of the battery with all grounded commons going to the 'sleeve + ring' of the TRS plug input. Looks like you used unbalanced TS plugs (without the 'ring') so this takes care of grounding the (-) ring connections
Suggest taping over the phantom power slide switch in OFF position so impossible to fry your mics by accidental high voltage.
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Hey guys. Thanks for all the help. I tried virtually every combination of possibilities. Here is what finally worked. I didn't connect the ground to the right channel. I only grounded the left 1/4 plug, and everything seemed to work correctly. Thanks for the info on the phantom power. I will be taping over the phantom power switch asap. I am glad this finally worked. Thanks for the suggestions again.
Scott