> I'm trying to (fully) understand the principle of capacitor reactance and
> high pass filters. I'm having trouble forming a mental picture of how a
> capacitor in series with a signal blocks DC and has the lowest impedance
> for the highest frequency signals on a voltage and charge-on-the-plate
> level.

Water model - Boxianly imperfect but useful.

Resistors are pipes. Diameter and length vary.

Current is current.

Voltage is pressure or head.

Capacitor is modelled by rubber sheet across a tank in the flow. Fluid
fills the tank on one side of the sheet and pressurises it. Stiffness
of sheet size of tank all have effects. This model handles many
capacitor features.

Inductor is a rubber pipe section. Diameter length and rubber
stiffness vary. Biggest departure is effect of removing voltage. A
water rotor with inertia may be able to provide a better model.


        Russell
--=20
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