Posted by Stewart A. on
URL: https://www.es-forum.com/Marc-Arjuna-beware-laptops-too-also-blowdryers-tp1542893p1542943.html

Garth Hitchens wrote:

> From this I conclude that it is not just using a laptop or not, or
> if it is plugged in or not, but that the internal design of the
> laptop can also have a profound effect. Although it sounds odd, I
> have found that at least for the Apple laptops, the switch from
> motorola G4 to Intel's CPU seemed to change things enough that my ES
> is not triggered anywhere nearly as much.


Doesn't sound odd to me at all. In fact that is exactly what I've found.
Each device or manufacturer has a different Engineering quality or Design.
It is Not differences in efficiency that concern me, but differences in emissions.

> As Shivani has mentioned, the high frequency noise caused by internal
> power conversion circuitry seems to be a key factor in ES issues.
> While some of these are only active when the unit is powered by AC
> power, most (like the flourescent display inverter, and dc/dc
> inverters) are active anytime the laptop is in use, regardless of if
> the unit is plugged in or not. And many of these are located just an
> inch from your palms when you are using the laptop keyboard.

Yes the biggest problem for me with laptops, is the proximity to the
emissions.
I am sensitive to DC as well as AC, so don't get any benefit from unplugging
and using only battery.

> As a result, I find my ES symptoms are least triggered by using
> either the laptop OR a desktop computer with standard (external)
> keyboard and mouse to keep my body away from the internals of the
> computer as much as possible.


Precisely.

> Finally, I would mention that I have found it useful to keep the
> actual power adapter unit for the laptop as far from my body as
> possible when using a laptop "plugged in".


Transformers produce some intense magnetic fields.
Also I've found it very interesting how
different transformer designs have widely differing field strengths.
A good use for a gaussmeter here.

Mix and match components or swap out boards until a quiet(er) solution is
found. (Yea, that can take a while...)

Stewart