Re: Speakers vs. Lamp


"ComputerGuy" <bh325@xxxxxxxxx> wrote in message
news:1138721217.163531.219330@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Ok, so far, thanks for your opinions, I appreciate your time.
>
> If anything I am now more confused.
>
> I have never seen a switch that won't arc. Every physical switch will
> arc as it closes or opens if there is power to one side.
>
> What I am understanding, though, is that the lamp pulls enough power
> that the switch opening produces a spike through the power circuit that
> is causing an instantaneous full-power situation to the speakers.
>
> One thing I have noticed is that neither the lamp nor the speakers have
> ground posts on their power cords. Also, the lamp only causes the spike
> when the lamp is turned off.
>
> Now, as I don't have access to an o-scope or similar equipment, what
> device would be a good method to suppress the spike from the lamp and
> stop the pop sound?

The usual fixes for a popping switch are:

(1) Replace the switch with one that simply arcs less. For example, a dimmer
doesn't arc at all, and the better ones are well-filtered for RF generation.

(2) Bypass the switch with a variety of electrical parts. A resistor and a
capacitor in series across the switch contact. Small inductors in series.

(3) Reduce the sensitivity of the device that is actually sending the pop to
the speakers. More capacitors and inductors, this time on inputs and if its
really bad, the outputs.


.

Relevant Pages

  • Re:gnack arrgg lighted switch help
    ... appreciate the head up regarding power to the lamp, ... test would be to use an ohmmeter and check that the connection between ... gnd terminal to each other terminal with the switch actually off and see ...
    (sci.electronics.repair)
  • Re: Speakers vs. Lamp
    ... > I have never seen a switch that won't arc. ... > arc as it closes or opens if there is power to one side. ... > One thing I have noticed is that neither the lamp nor the speakers have ...
    (rec.audio.opinion)
  • Re: Speakers vs. Lamp
    ... I have never seen a switch that won't arc. ... What I am understanding, though, is that the lamp pulls enough power ... One thing I have noticed is that neither the lamp nor the speakers have ...
    (rec.audio.opinion)
  • Re: Flourescent lamp -Wasting Power?
    ... >> or you could use an isolation transformer in the power line. ... measured almost 2 volts ac across it (lamp switched off) with my olde ... to the real power being dissipated by that electronic ballast. ... controlled by a single pole four position rotary switch which sequences ...
    (sci.electronics.design)
  • Re: Strange control problem -- SOLVED!!! -- 3 phase "firing system"
    ... Did you notice any difference in the arc between ... welder, switched by the same switch as the main 3 phase contactor. ... will power the water cooler outlet on the welder, the fan, 12VDC power ...
    (sci.electronics.design)