[ddots-l] Re: getting shocked by equipment in home studio, any sug gest ions?

  • From: "albertm13@xxxxxxxx" <albertm13@xxxxxxxx>
  • To: ddots-l@xxxxxxxxxxxxx
  • Date: Sun, 20 Sep 2009 12:55:23 GMT

Hi,

This is pretty scary because you are using your body to test this.  The problem 
can be tested with the correct equipment and your body is the wrong equipment.

Albert

---------- Original Message ----------
From: "Cameron" <cameron@xxxxxxxxxxxxxxxxx>
To: <ddots-l@xxxxxxxxxxxxx>
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any suggest 
ions?
Date: Sat, 19 Sep 2009 13:30:47 -0400

Hi.  No no no, it's not just when you touch a mic.  it's when you touch
anything metal connected to the power conditioner, like the control surface,
computer, audio interface, and the conditioner itself.

as soon as the mic is unplugged, everything is back to normal.

Cameron.





-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of D!J!X!
Sent: Saturday, September 19, 2009 2:02 PM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggest ions?

Interesting, and you get shocked everytime you touch a mic plugged into the
mixer??? How about when you touch the mixer itself?

D!J!X!
 

-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Cameron
Sent: Saturday, September 19, 2009 12:45 PM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggest ions?

carpet.





-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of D!J!X!
Sent: Saturday, September 19, 2009 1:36 PM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggest ions?

Put on shoes and try it, or wait, are you on carpet?

D!J!X!
 

-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Cameron
Sent: Saturday, September 19, 2009 12:32 PM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggest ions?

Hi.  not wearing shoes, my desk is not metal, and I am not touching the mics
when I get shocked.  although, touching the mics will shcok me too if I do.

they are all 3 prong outlets.

Cameron.





-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of albertm13@xxxxxxxx
Sent: Saturday, September 19, 2009 9:57 AM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggest ions?

Hi,

If you have three pronged outlets you could possibly start by going to a
hardware store and buying an outlet tester.  Sorry, I couldn't find one at
homedepot.com.  You can read about them at
en.wikipedia.org/wiki/Receptacle_tester and
www.acmehowto.com/howto/homemaintenance/electrical/outlettest.php
Make sure you get one that can be plugged into the outlet and not just put
near the outlet.  You would need sighted help because they only have lights.
They are not expenssive.

If you have two pronged outlets then it's probably a bad piece of equipment
on your end but turning the plugs around might help.  I don't know of an
easy way for you to test for the problem without a voltmeter.

If the problem isn't your house wiring then you need someone who could
figure out what piece of your equipment is causing this problem.  Old pieces
of equipment like a tube amps are notorious for causing this problem.

Whenever you get shocked, electricity flows through you which means it has
to go in one part of you and out another.  Birds on power lines don't get
killed because they are only touching one thing.  You are touching your mics
but you must be touching something else too.  That's why someone else
recommended a rubber mat.  Using a rubber mat is only hiding the problem but
the problem is still there.  Are you wearing shoes?  Perhaps your desk is
metal and it is touching something.

Albert

--- Cameron wrote ---
Hi all.  I have a problem, hopefully someone can give me some suggestions or
shed some light on why this is happening.

The apartment complex I’m living in now was built in the early sixties I
believe.  The outlets are not very good, worn out, you can’t plug anything
into the top of any of them because it just falls out.  You can only plug
things into the bottom plug.

Anyways, when I was using my FW1884, I didn’t notice any issues with
anything except for noise because I am on a dirty circuit/loop being shared
by all sorts of appliances and god knows what else. 

My current setup is now my ADK rack mount machine, Motu896 MKIII firewire
interface, and BCF2000 control surface, which is all plugged into a power
conditioner.

I started doing some tracking with my new gear for a new job this week and
whenever I used a mic that required phantom power, as soon as the mic was
plugged into the interface, I would get shocked if I touched anything metal
that was plugged into the conditioner, including the mic itself computer,
control surface, interface, etc, .  It’s not enough to cause damage, but it
is unplesent and is enough of a jolt to make you quickly stop touching
whatever control you’re touching.

This happens even when the phantom power is switched off for every channel
on the interface.  I found out this afternoon that it also happens with
dynamic mics too.

As soon as all mics are unplugged, everything is fine.

My power conditioner doesn’t appear to have a ground lift switch.  Is this
the issue?  Is there anything I can do to remedy this?  I’ve got 5 months of
writing and recording ahead and I really don’t want to be freaking shocked
every time I touch my gear!

I’m going to make this issue known to the apartment manager on Monday but I
really doubt they will understand what I’m talking about, or give a damn for
that matter.

Any thoughts would be greatly appreciated!

Thanks,
Cameron.

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