# A couple of power supply issues

**URL:** <https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784>\
**Category:** Quad Cortex\
**Tags:** quad-cortex\
**Created:** [April 2, 2024, 3:40pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784 "2024-04-02T15:40:22Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![rwinking](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@rwinking](https://unity.neuraldsp.com/u/rwinking)\
**Post date:** [April 2, 2024, 3:40pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784/1 "2024-04-02T15:40:22Z")

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I was trying to use my pedal snake to supply power to my QC. The end from the snake fit into the power supply receptor on the QC but was fairly loose and everytime I bumped it it would power down. I spoke with Jody from pedalsnake and he thought that the QC had a 2.5mm jack as opposed to my line 6 2.1mm jack. If that is the case, the 2.5mm jack should not have fit. So what is the size of it?  
thanks rick

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**Author:** ![DiffractionCircuit](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/diffractioncircuit/32/3793_2.png) [@DiffractionCircuit](https://unity.neuraldsp.com/u/DiffractionCircuit)\
**Post date:** [April 2, 2024, 3:44pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784/2 "2024-04-02T15:44:02Z")

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I’m pretty sure the QC has a 2.1 mm size.

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**Author:** ![rwinking](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@rwinking](https://unity.neuraldsp.com/u/rwinking)\
**Post date:** [April 2, 2024, 3:46pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784/3 "2024-04-02T15:46:42Z")

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And I think that is the same size as my line 6 stuff. However, it is perfectly tight in my line 6 HX stomp and loose on my QC. Hmmm…maybe the line 6 is 2.5mm and I have it backwards?  
rick

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**Author:** ![PaoloM](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/paolom/32/4876_2.png) [@PaoloM](https://unity.neuraldsp.com/u/PaoloM)\
**Post date:** [April 2, 2024, 4:17pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784/4 "2024-04-02T16:17:11Z")

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The HX Stomp is 2.5 and the QC is 2.1, I have them both

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**Author:** ![rwinking](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@rwinking](https://unity.neuraldsp.com/u/rwinking)\
**Post date:** [April 2, 2024, 5:03pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784/5 "2024-04-02T17:03:30Z")

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Thanks you guys! I really appreciate your help on this. It looks like I have had it backwards so all I have to do is order the 2.1mm Powerlines.  
rick

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**Author:** ![MP\_Mod](https://avatars.discourse-cdn.com/v4/letter/m/ccd318/32.png) [@MP\_Mod](https://unity.neuraldsp.com/u/MP_Mod)\
**Post date:** [April 2, 2024, 5:50pm UTC](https://unity.neuraldsp.com/t/a-couple-of-power-supply-issues/13784/6 "2024-04-02T17:50:23Z")

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