banner

Announcement

Collapse
No announcement yet.

DIY patch bay ground noise

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • DIY patch bay ground noise

    Just put this little thing together for my pedal board, but its causing quite a bit of noise. Casing is plastic, as I figured that would make grounding easier. Anything I've missed? Just ****ty components? All cables in it are shielded.
    Attached Files
    --------------------------------------------------------
    1973 Aria 551
    1984 Larrivee RS-4 w/ EMG SA/SA/89
    1989 Charvel 750 XL w/ DMZ Tone Zone & Air Norton
    1990's noname crap-o-caster plywood P/J Bass
    1991 Heartfield Elan III w/ DMZ mystery pups
    1995 Aria Pro II TA-65
    2001 Gibson Les Paul Gothic w/ PG-1 & SH-8

  • #2
    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.
    Oh no.....


    Oh Yeah!

    Comment


    • #3
      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.

      Sent from my SM-G930V using Tapatalk
      -Greg

      Guitars:
      2016 Ibanez RG6003FM (JB/'59nJ)
      2018 G&L Tribute Legacy (Hot Rails/stock/stock)
      2019 Squier Affinity Telecaster HH (Esquire'd w/ JB)
      Applause/Ovation AE28 Acoustic/Electric

      Comment


      • #4
        Re: DIY patch bay ground noise

        Originally posted by skyydogg01 View Post
        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.

        Sent from my SM-G930V using Tapatalk
        Huh? I don't understand, if there's only one wire, how do you twist it around anything?

        Skickat från min SM-G955F via Tapatalk
        --------------------------------------------------------
        1973 Aria 551
        1984 Larrivee RS-4 w/ EMG SA/SA/89
        1989 Charvel 750 XL w/ DMZ Tone Zone & Air Norton
        1990's noname crap-o-caster plywood P/J Bass
        1991 Heartfield Elan III w/ DMZ mystery pups
        1995 Aria Pro II TA-65
        2001 Gibson Les Paul Gothic w/ PG-1 & SH-8

        Comment


        • #5
          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.
          Last edited by Gtrjunior; 07-28-2018, 11:03 AM.

          Comment


          • #6
            Re: DIY patch bay ground noise

            I've now tried re-soldering. Top one is shield wire connected ground to ground. Bottom one twisted wires. Problem still persist. Thoughts?

            Skickat från min SM-G955F via Tapatalk
            Last edited by Coma; 07-29-2018, 03:36 PM.
            --------------------------------------------------------
            1973 Aria 551
            1984 Larrivee RS-4 w/ EMG SA/SA/89
            1989 Charvel 750 XL w/ DMZ Tone Zone & Air Norton
            1990's noname crap-o-caster plywood P/J Bass
            1991 Heartfield Elan III w/ DMZ mystery pups
            1995 Aria Pro II TA-65
            2001 Gibson Les Paul Gothic w/ PG-1 & SH-8

            Comment


            • #7
              Re: DIY patch bay ground noise

              Do you need to ground each outlet to a common ground? Like a metal chassis?
              I would have thought the twist would have at least helped.

              Comment


              • #8
                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.
                Last edited by Hank-; 07-30-2018, 12:10 AM.

                Comment


                • #9
                  Re: DIY patch bay ground noise

                  Originally posted by Hank- View Post
                  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.
                  Additional noise with bay. Same wire in both pictures. Quite thin ones, too. Think they're 0.5 mm.

                  Skickat från min SM-G955F via Tapatalk
                  --------------------------------------------------------
                  1973 Aria 551
                  1984 Larrivee RS-4 w/ EMG SA/SA/89
                  1989 Charvel 750 XL w/ DMZ Tone Zone & Air Norton
                  1990's noname crap-o-caster plywood P/J Bass
                  1991 Heartfield Elan III w/ DMZ mystery pups
                  1995 Aria Pro II TA-65
                  2001 Gibson Les Paul Gothic w/ PG-1 & SH-8

                  Comment


                  • #10
                    Re: DIY patch bay ground noise

                    Are the grounds on input/output connected to eachother?
                    Also amp & pedalboard is on the same mains outlet?

                    Comment


                    • #11
                      Re: DIY patch bay ground noise

                      Originally posted by Hank- View Post
                      Are the grounds on input/output connected to eachother?
                      Also amp & pedalboard is on the same mains outlet?
                      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.

                      Skickat från min SM-G955F via Tapatalk
                      --------------------------------------------------------
                      1973 Aria 551
                      1984 Larrivee RS-4 w/ EMG SA/SA/89
                      1989 Charvel 750 XL w/ DMZ Tone Zone & Air Norton
                      1990's noname crap-o-caster plywood P/J Bass
                      1991 Heartfield Elan III w/ DMZ mystery pups
                      1995 Aria Pro II TA-65
                      2001 Gibson Les Paul Gothic w/ PG-1 & SH-8

                      Comment


                      • #12
                        Re: DIY patch bay ground noise

                        I meant like the grounds are coneected like this:
                        Send in > Send out
                        Return in> Return out
                        Amp in> amp out

                        Wait dont answer that, its obvious from the pics lol
                        Last edited by Hank-; 07-30-2018, 12:36 AM.

                        Comment


                        • #13
                          Re: DIY patch bay ground noise

                          Originally posted by Coma View Post
                          Casing is plastic, as I figured that would make grounding easier. Anything I've missed? Just ****ty components? All cables in it are shielded.
                          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.


                          Sent from my iPhone using Tapatalk

                          Comment


                          • #14
                            Re: DIY patch bay ground noise

                            Originally posted by DavidRavenMoon View Post
                            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.


                            Sent from my iPhone using Tapatalk
                            Shielded wire. Inner conductor and outer braided shield, covered by black tubing.

                            What does rubbing coax mean?

                            Skickat från min SM-G955F via Tapatalk
                            --------------------------------------------------------
                            1973 Aria 551
                            1984 Larrivee RS-4 w/ EMG SA/SA/89
                            1989 Charvel 750 XL w/ DMZ Tone Zone & Air Norton
                            1990's noname crap-o-caster plywood P/J Bass
                            1991 Heartfield Elan III w/ DMZ mystery pups
                            1995 Aria Pro II TA-65
                            2001 Gibson Les Paul Gothic w/ PG-1 & SH-8

                            Comment


                            • #15
                              DIY patch bay ground noise

                              Originally posted by Coma View Post
                              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.


                              Sent from my iPhone using Tapatalk

                              Comment

                              Working...
                              X