10 watt shock from iMac-halp?

Configure and optimize you computer for Audio.
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nix808
KVRAF
3627 posts since 22 Jul, 2006 from Tasmania, Australia

Post Sun Oct 21, 2018 2:42 pm

Heya,
hmm- I'm getting low wattage shocks from my gear(a tickly kinda thing on soft contact), it's coming from->
Alienware monitor
imac
2 soundcards(stringport,presonus audiobox)
What do you make of it?

The 300 watt(I think) Alienware is fine to touch the installed power supply unit

I have a multi-meter, have not measured(a little unsure how)

Maybe I have a bad ground somewhere?
What should I do?

User avatar
nix808
KVRAF
3627 posts since 22 Jul, 2006 from Tasmania, Australia

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 4:15 pm

on the presonus audiobox 1818vsl-
the current is coming over the USB lead.
Is it just normal, do u think?

mrcleats
KVRist
238 posts since 5 Nov, 2007 from Liverpool, UK

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 4:36 pm

Not normal, no. Sorry, what do you touch that gives you the shock?

mrcleats
KVRist
238 posts since 5 Nov, 2007 from Liverpool, UK

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 4:38 pm

Current over a usb lead is absolutely normal, but getting a shock isn't.

User avatar
nix808
KVRAF
3627 posts since 22 Jul, 2006 from Tasmania, Australia

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 4:49 pm

it's the aluminium faceplate or steelwork cover,
it is truly the lightest tingle atm

mrcleats
KVRist
238 posts since 5 Nov, 2007 from Liverpool, UK

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 4:53 pm

Is it constant, or is it like a static discharge?

Sorry, just to be clear, it's coming from the aluminium faceplate of the presonus soundcard?

User avatar
nix808
KVRAF
3627 posts since 22 Jul, 2006 from Tasmania, Australia

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 5:09 pm

it's constant,
it doesn't discharge.
Yep, it's coming from the extruded alu faceplate or fabricated steel cover,
when USB is plugged in. the AudioBox is not plugged to it's power adaptor when this happens-
just to a USB lead. I can try plugging it into the power socket

What I did was unconnect everything and make sure I have all grounds in place,
the Audiobox has no ground. It's 18v DC adapted with the original adaptor

JerGoertz
KVRAF
2133 posts since 20 Feb, 2004

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 5:51 pm

Is there a fork sticking out of the power socket?
A well-behaved signature.

User avatar
nix808
KVRAF
3627 posts since 22 Jul, 2006 from Tasmania, Australia

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 8:33 pm

I had a snooze for a couple of hours-
and the Presonus doesn't make my hand tingle any more.
The iMac still does though.
I guess I won't worry about it.

Jer Goertz, we did possibly have a short in the house when our fridge stopped working recently.
That socket is now broken

User avatar
nix808
KVRAF
3627 posts since 22 Jul, 2006 from Tasmania, Australia

Re: 10 watt shock from iMac-halp?

Post Sun Oct 21, 2018 9:15 pm

oh u mean this one JerGoertz…
!
heh

robotmonkey
KVRAF
2032 posts since 20 Jun, 2012

Re: 10 watt shock from iMac-halp?

Post Fri Oct 26, 2018 8:52 am

It's normal. This is what gives your tracks analog warmth.
No signature here!

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