I don't know of a way-- except holding it up to a spectrum analyzer,
analyzing the circuit theoretically, or possibly looking it up on the FCC
website ( I posted a link to the site a few days ago) if you can find the
FCC ID number.
I think usually they are a few tens of kilohertz or up to 200 kHz.
There will be strong harmonics above that I assume.
Bill
On Wed, Oct 8, 2008 at 1:48 PM, abailey63 <
[hidden email]> wrote:
> Thanks for the insight. I was wondering if there is a way to find out
> what frequency it would switch at. I take it it is not at 60hz would
> the voltage (i.e. 12v) be in indicator?
>
> Thanks, Alan
>
>
> --- In
[hidden email] <eSens%40yahoogroups.com>, "Bill Bruno"
> <wbruno@...> wrote:
> >
> > It may depend what frequency the brick switches at.
> > Also, if the dirty power leaks into the coils in the speaker
> > then they act like a big magnet/ antenna.
> >
> > When playing they also put out ELF magnetic fields in the audible
> > frequency ranges.
> >
> > Bill
> >
> > On Sun, Sep 28, 2008 at 4:29 PM, abailey63 <abailey63@...> wrote:
> >
> > > I am staying in this house where the person has a couple of powered
> > > subwoofers. One large home theatre onkyo and a computer altec lansing
> > > one. I've never had problems with these before but I find I need to
> > > power them off to sleep. Does anyone have any experience with why a
> > > powered subwoofer would be particularly "noisy" from a power
> > > perspective. They both have the transformer power bricks.
> > >
> > > Thanks, Alan
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
[Non-text portions of this message have been removed]
Locked
