The stated line voltage is an RMS value. [root means squared]
 For instance, some AC to AC adapters at 24 volts will give over 100 volts
of peak to peak voltage.
 The small one I use puts out 81 volts peak to peak [measured on
occiloscope] but only 33 volts RMS AC..as measured by a meter.
Ken

At 03:26 PM 10/15/01 -0400, you wrote:
>"Half wave rectifiying 110 volts AC will give you
>about 154 volts peak DC. With 220 volts you will get
>about 308 volts peak DC."
>
>Hold on a minute here, I am not an electrical
>technician, but my understanding of the juice goes
>like this. A sine wave AC electrical current has 2
>halves, the top half, which looks like the top half of
>a circle, and the bottom half of the circle, like an S
>on it's it's side, with a line horizontally through
>the middle. A half-wave rectifier, as I understand it,
>keeps the electricity from reversing the direction of
>the flow, cutting off the bottom half cirlce, and
>making, functionally, a pulsating DC current, which,
>for brewing CS, appears to make a good CS (for me it
>does).
>
>I am at a loss to understand how then a particular
>voltage would be increased by a rectifier.
>
>
>Comments, anyone?
>
>Terry Chamberlin
>
>
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