DIY patch bay ground noise
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PFDarkside
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Re: DIY patch bay ground noise
If the cables are shielded you should solder the conductor to the tip lug and the shield to the sleeve lug. Then tie three of the ground lugs together. In this case a metal box would be better as they’d all be case grounded.
If the cables are shielded you should solder the conductor to the tip lug and the shield to the sleeve lug. Then tie three of the ground lugs together. In this case a metal box would be better as they’d all be case grounded.
skyydogg01
New member
Re: DIY patch bay ground noise
It appears that you are using single conductor wiring. In that case, twist the wires around each other. Each pair should be twisted individually. That would be the best way in such a configuration.
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It appears that you are using single conductor wiring. In that case, twist the wires around each other. Each pair should be twisted individually. That would be the best way in such a configuration.
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Coma
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Re: DIY patch bay ground noise
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Huh? I don't understand, if there's only one wire, how do you twist it around anything?
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Gtrjunior
New member
DIY patch bay ground noise
Not one wire ....single conductor wiring. .
Each set of jacks has 2 wires, essentially creating a loop. Those 2 wires should be twisted together. You’ll likely need to rewire since the current wires will be too short to twist.
Edit:
You might want to somehow label or color code one of the wires so you know which is which when they are twisted.
Not one wire ....single conductor wiring. .
Each set of jacks has 2 wires, essentially creating a loop. Those 2 wires should be twisted together. You’ll likely need to rewire since the current wires will be too short to twist.
Edit:
You might want to somehow label or color code one of the wires so you know which is which when they are twisted.
Last edited:
Re: DIY patch bay ground noise
Are you getting additional noise or same amount of noise, with or without using the bay?
Use two conductor wires in there, like in the last pic, makes it easier to work & function. I cant tell how thick the conductors are in the first pic, its better to go with thin ones, or they might be as thick as a thin speaker cable, that could pickup more noise. Even with the two conductor wire try to go as thin as possible.
The grounds should match on the respective outlet too . Like e.g. make sure the send/ return input has the matching grounf to the send/rerurn output of that box.
If you are running the amp & pedalboard on different outlets then that can cause noise bugs too.
Are you getting additional noise or same amount of noise, with or without using the bay?
Use two conductor wires in there, like in the last pic, makes it easier to work & function. I cant tell how thick the conductors are in the first pic, its better to go with thin ones, or they might be as thick as a thin speaker cable, that could pickup more noise. Even with the two conductor wire try to go as thin as possible.
The grounds should match on the respective outlet too . Like e.g. make sure the send/ return input has the matching grounf to the send/rerurn output of that box.
If you are running the amp & pedalboard on different outlets then that can cause noise bugs too.
Last edited:
Coma
Well-known member
Re: DIY patch bay ground noise
Additional noise with bay. Same wire in both pictures. Quite thin ones, too. Think they're 0.5 mm.
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Additional noise with bay. Same wire in both pictures. Quite thin ones, too. Think they're 0.5 mm.
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Coma
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Re: DIY patch bay ground noise
Haven't tried it with the rest of the pedal board yet. So far I've only connected guitar through one port at a time and then directly to amp.
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Not sure what you mean. Yes, the grounds on each pair are connected, but no if you mean each pair shares a joint ground. The latter seemed pointless to me, as they're basically supposed to function as cable extensions anyway.
Haven't tried it with the rest of the pedal board yet. So far I've only connected guitar through one port at a time and then directly to amp.
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DavidRavenMoon
New member
Re: DIY patch bay ground noise
How would a plastic case make grounding easier? In a metal enclosure the case becomes ground and shields your wires.
And how are the cables shielded? I see two wires on each jack. On a shielded cable you have the ground and the signal wire. The shield is the ground.
Are you rubbing coax without the shields grounded? That will produce hum.
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How would a plastic case make grounding easier? In a metal enclosure the case becomes ground and shields your wires.
And how are the cables shielded? I see two wires on each jack. On a shielded cable you have the ground and the signal wire. The shield is the ground.
Are you rubbing coax without the shields grounded? That will produce hum.
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Coma
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Re: DIY patch bay ground noise
What does rubbing coax mean?
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Shielded wire. Inner conductor and outer braided shield, covered by black tubing.
What does rubbing coax mean?
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DavidRavenMoon
New member
DIY patch bay ground noise
That was “running” but my phone decided differently!
I think you have your two wires reversed. So the shield is hot. That will cause hum.
If you are using coax why did the first picture show two wires on each jack?
Also what are you patching together? If you patch two different pieces of AC powered gear you can introduce ground loops.
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Shielded wire. Inner conductor and outer braided shield, covered by black tubing.
What does rubbing coax mean?
Skickat från min SM-G955F via Tapatalk
That was “running” but my phone decided differently!
I think you have your two wires reversed. So the shield is hot. That will cause hum.
If you are using coax why did the first picture show two wires on each jack?
Also what are you patching together? If you patch two different pieces of AC powered gear you can introduce ground loops.
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Coma
Well-known member
Re: DIY patch bay ground noise
I dont think so. Outer tab is signal path, inner is ground. Not sure if you can tell by that picture, but the extended metal "tongue" connecting to the cable end is the same piece as the outer soldering tab. And cable is connected the same way on both ends.
And ignore the first picture. I wired it that way because I'm an idiot who doesn't understand how shielded cables should be connected.
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I dont think so. Outer tab is signal path, inner is ground. Not sure if you can tell by that picture, but the extended metal "tongue" connecting to the cable end is the same piece as the outer soldering tab. And cable is connected the same way on both ends.
And ignore the first picture. I wired it that way because I'm an idiot who doesn't understand how shielded cables should be connected.
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Re: DIY patch bay ground noise
Only thing I can think of is trying a metal box with plastic jacks if you don't want the grounds isolated. Or, those same jacks if you want the grounds shared. I'm just taking a wild arse guess that, maybe, you are getting some type of outside interference. A metal box should provide some shielding. Or, maybe you could try shielding the interior of that plastic box with copper or foil tape.
Only thing I can think of is trying a metal box with plastic jacks if you don't want the grounds isolated. Or, those same jacks if you want the grounds shared. I'm just taking a wild arse guess that, maybe, you are getting some type of outside interference. A metal box should provide some shielding. Or, maybe you could try shielding the interior of that plastic box with copper or foil tape.
Coma
Well-known member
Re: DIY patch bay ground noise
I've got a metal box I'm gonna try with. Do I need plastic Jack's or will my current ones work?
I've got a metal box I'm gonna try with. Do I need plastic Jack's or will my current ones work?
Re: DIY patch bay ground noise
Your current jacks will work but they will all share the ground because the box is metal. That may work fine. If not, the plastic jacks with plastic threads would allow the grounds to remain isolated.
Like these ... http://www.neutrik.com/en/audio/plugs-and-jacks/m-series/nmj2hf-s
Your current jacks will work but they will all share the ground because the box is metal. That may work fine. If not, the plastic jacks with plastic threads would allow the grounds to remain isolated.
Like these ... http://www.neutrik.com/en/audio/plugs-and-jacks/m-series/nmj2hf-s
Coma
Well-known member
Re: DIY patch bay ground noise
Put it this way: this box will cover connections to preamp, then FX loop send and return. With everything connected with shared ground, will this be a problem? Is there any reason NOT to use the Jacks I have?
Yeah, I've seen those used in some boxes. Then again half the other ones I've seen haven't. I'm finding it difficult to suss out what is the proper way to do it.
Put it this way: this box will cover connections to preamp, then FX loop send and return. With everything connected with shared ground, will this be a problem? Is there any reason NOT to use the Jacks I have?
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