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  • FX Loop loud humming/Channel popping

    Hi guys I could really use some input here,



    I just got an EVH 5150 III 50 watt and it is a fantastic amp. However an issue has arisen today that is bothering me.



    I had my pedal board all setup (unchanged for over 1 year) all plugged in with a Carbon Copy in the loop. I put the amp on, waited then put in on stand by. I stomped on the footswtich from green to blue and BOOM loud popping noise. All channels are doing this.



    So I go straight into the amp with guitar, and its fine. Then I just run the pedals up front (Wah/Phaser/Flanger) no popping. Then I just run the FX Loop, no popping however when I engage the FX loop on the footswitch, Massive hum on all channels.



    I tested all the pedals up front individually no channel popping or hum

    If I put one pedal in the FX loop with no pedals up front, massive hum but no channel popping.



    I don't understand what is happening, the amp was working fine a couple weeks ago, and now all these issues? this is my current layout:



    Guitar ---Wah---Phaser---Flanger Carbon Copy in FX Loop

    all connected with DC Brick



    All advice is welcome

    EDIT: The humming is from the florescent lights in my basement; however all the pedals are hooked up and the channel popping still happens
    <div class="signaturecontainer">My Rig:<br />
    Peavey Wolfgang Standard<br />
    Charvel San Dimas<br />
    EVH 5150 III 50 Watt<br />
    EVH95 Wah<br />
    MXR EVH Phase 90<br />
    MXR EVH Flanger<br />
    MXR Stereo Chorus<br />
    MXR Carbon Copy<br />
    <br />
    <font size="2">Good Transactions: ZachMetal, solly</font></div>

  • #2
    I haven't a clue what might be causing it circuit-wise but did you try cleaning the jacks of the FX loop? If they haven't been used in a long time there could be oxidation.
    <div class="signaturecontainer"><a target="_blank" href="http://tinypic.com?ref=jsg7xg"><img alt="Image and video hosting by TinyPic" src="http://i48.tinypic.com/jsg7xg.gif" border="0"></a><a target="_blank" href="http://tinypic.com?ref=2ds06f6"><img alt="Image and video hosting by TinyPic" src="http://i.imgur.com/7HWFWGS.gif" border="0"></a><br><font face="Comic Sans MS"><font size="1"><font color="lime">Happy days so far with: Kayzer, Snufkino, matchpoint, SG1</font></font></font></div>

    Comment


    • #3
      I haven't a clue what might be causing it circuit-wise but did you try cleaning the jacks of the FX loop? If they haven't been used in a long time there could be oxidation.
      <div class="signaturecontainer"><a target="_blank" href="http://tinypic.com?ref=jsg7xg"><img alt="Image and video hosting by TinyPic" src="http://i48.tinypic.com/jsg7xg.gif" border="0"></a><a target="_blank" href="http://tinypic.com?ref=2ds06f6"><img alt="Image and video hosting by TinyPic" src="http://i.imgur.com/7HWFWGS.gif" border="0"></a><br><font face="Comic Sans MS"><font size="1"><font color="lime">Happy days so far with: Kayzer, Snufkino, matchpoint, SG1</font></font></font></div>

      Comment


      • #4
        ^^^^^^

        Same thing I was thinkin'. If it's hasn't been used in a while probably the issue.

        Comment


        • #5
          ^^^^^^

          Same thing I was thinkin'. If it's hasn't been used in a while probably the issue.

          Comment


          • #6
            Check for a ground-loop problem. I run into that issue sometimes when I have pedals plugged into the same power source but within the loop and in front of the amp.
            <div class="signaturecontainer"><img src="http://img3.harmony-central.com/acapella/ubb/thumb.gif" border="0" alt="" title="thumbs up" class="inlineimg" />: brianeharmonjr, Bro Blue, dirteye, fragocity, Gojo03, hivedestruction, hosebeast, Kano2864212, marekk, mitre, needleTOink, PumpkinPieces, sh333, SunofNothing, this1smyne, unicornwarrior</div>

            Comment


            • #7
              Check for a ground-loop problem. I run into that issue sometimes when I have pedals plugged into the same power source but within the loop and in front of the amp.
              <div class="signaturecontainer"><img src="http://img3.harmony-central.com/acapella/ubb/thumb.gif" border="0" alt="" title="thumbs up" class="inlineimg" />: brianeharmonjr, Bro Blue, dirteye, fragocity, Gojo03, hivedestruction, hosebeast, Kano2864212, marekk, mitre, needleTOink, PumpkinPieces, sh333, SunofNothing, this1smyne, unicornwarrior</div>

              Comment


              • #8
                Well the humming was from my basement lights so the humming is out of the question



                Things I've determined:



                -Plug all the pedals in the DC Brick and run them in front of the amp, no channel popping but the pedals do pop when engaged



                -Plug all the pedals in the DC Brick and run them in the loop, no channel popping but the pedals do pop when engaged



                -If I have my Wah, Phaser and Flanger plugged into the DC brick and the Carbon Copy into the loop with a battery, no channel popping but the pedals in connected to the DC brick to pop, not loudly but it is noticeable



                Would switching to a Voodoo Lab power supply help maybe plugging all the pedals into the DC brick since it doesn't have isolated ports?
                <div class="signaturecontainer">My Rig:<br />
                Peavey Wolfgang Standard<br />
                Charvel San Dimas<br />
                EVH 5150 III 50 Watt<br />
                EVH95 Wah<br />
                MXR EVH Phase 90<br />
                MXR EVH Flanger<br />
                MXR Stereo Chorus<br />
                MXR Carbon Copy<br />
                <br />
                <font size="2">Good Transactions: ZachMetal, solly</font></div>

                Comment


                • #9
                  Well the humming was from my basement lights so the humming is out of the question



                  Things I've determined:



                  -Plug all the pedals in the DC Brick and run them in front of the amp, no channel popping but the pedals do pop when engaged



                  -Plug all the pedals in the DC Brick and run them in the loop, no channel popping but the pedals do pop when engaged



                  -If I have my Wah, Phaser and Flanger plugged into the DC brick and the Carbon Copy into the loop with a battery, no channel popping but the pedals in connected to the DC brick to pop, not loudly but it is noticeable



                  Would switching to a Voodoo Lab power supply help maybe plugging all the pedals into the DC brick since it doesn't have isolated ports?
                  <div class="signaturecontainer">My Rig:<br />
                  Peavey Wolfgang Standard<br />
                  Charvel San Dimas<br />
                  EVH 5150 III 50 Watt<br />
                  EVH95 Wah<br />
                  MXR EVH Phase 90<br />
                  MXR EVH Flanger<br />
                  MXR Stereo Chorus<br />
                  MXR Carbon Copy<br />
                  <br />
                  <font size="2">Good Transactions: ZachMetal, solly</font></div>

                  Comment



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