Re: relays

On Fri, 14 Nov 2008 08:02:08 -0600, John Fields
<jfields@xxxxxxxxxxxxxxxxxxxxx> wrote:

On Thu, 13 Nov 2008 19:22:07 -0800, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Thu, 13 Nov 2008 17:40:30 -0800, "Joel Koltner"
<zapwireDASHgroups@xxxxxxxxx> wrote:

Hey John,

"John Larkin" <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:qblph4lch7ca5kl0q8e3qt8hogfc8rs6k6@xxxxxxxxxx
Play with words, or numbers, all you like. I have been careful to
specify "power gain."

Using your definitions, a mechanical valve can have power gain, yes? That'd
be an awfully early form of a gain element.

Its power gain is infinite, because once you turn the valve, the water
flows forever. It's a power integrator, not an amplifier.

---
No, it's an amplifier.

If you turn it a little, a little water will come out, but if you turn
it a lot, a lot of water will come out.

But that water will come out forever, with no further effort exerted
on the valve. The longer you wait, the more output power, without
limit. The output power is the *integral* of the input power.

John


.

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