update on alternator noise over speakers

[Lawrence C Leung]

The battery is a series of parallel plates of lead and possibly some
other metal. (7 in total I believe, don't really know the electro-neg of
lead, especially without knowing what the secondary metal is, been WAY
too long). The galvanic action of the two metals should provide the
voltage (each "cell" has approximately 2 V of potential, connected in a
series, giving at total voltage, no load of 13.7 V, even in a weakened
battery. Has to do with the chemistry, not the condition of the battery).
The acid serves as the electrolyte, which allows the transfer of
electrons. BTW, battery's fail as sediments build up at the bottom of the
battery. These sediments eventually short out the opposing plates
(usually one cell at a time) lowering the total voltage of the battery.
Plate size affects the available current, bigger plates, bigger current. 

So, how does this affect your stereo. A capacitor is a device that stores
charge between oppositely charged separated plates. Well, that's exactly
what a lead-acid battery is, hence, the battery acts as one big mutha
capacitor, which will store energy spikes that normally would go onto
your stereo amp making noise. The battery releases the spikes slowly
(approximating a constant 13.7 volts) thus reducing or eliminating
ignition noise. 

LL - NY

On Sun, 10 Dec 2000 16:48:35 -0800 (PST) =?iso-8859-1?q?mike?=
<mikemk40 at yahoo.com> writes:
>
>>you also gain the benefit of one really large
>> capacitor in
>> parallel to the head and amps. 
>> 
> don't understand this...care to explain?
>
>
>mike
>
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