[sdiy] Hum Problem Kaput

[John L Marshall]

Most Laptop computers have only a two prong plug with the return pin a
little wider. Does your laptop have an in-the-line power supply? Most do. I
see no safety issue as the power supply "should" provide complete isolation
from the mains power. The highest voltage that your laptop uses is probably
12 volts. Is your laptop made of plastic? Thought so. No place for your body
to make a connection to the laptop and another conductor.

----- Original Message -----
From: Moho Disco <moho at mohodisco.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Monday, December 17, 2001 11:42 PM
Subject: [sdiy] Hum Problem Kaput


> Well, this is for the benefit of anybody who
> would like to know how my hum problem
> got resolved...
>
> I got my Echo Layla24 laptop adapter, and
> the hum reduced by a good 60%.  And then
> after that I plugged the laptop's power supply
> into a two-prong adapter disconnecting the
> ground plug, and bingo, all the rest of the
> hum was gone.
>
> So I have a question.  Does getting rid of
> the ground plug expose me or my laptop
> to any kind of electrical danger?  What
> exactly does removal of the ground do?
>
> Thanks,
>
> Lava
>
>