Re: relays


On Tue, 18 Nov 2008 16:07:25 -0800, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Thu, 13 Nov 2008 16:50:16 GMT, James Arthur
<bogusabdsqy@xxxxxxxxxxx> wrote:

a7yvm109gf5d1@xxxxxxxxxxx wrote:
I was arguing at work yesterday that relays have gain. Just because
it's non-linear and electromechanical doesn't mean it has no gain. I
mean a light switch has gain if you look at the power you can control
with a finger. I think that silicon guys think gain must be linear or
continuous, and be electrical in,electrical out. I think "gain" is
much broader.

Am I right? Who owes who a beer? And on that note, could a carbon
particle microphone be so constructed that instead of a sound wave
input, I put a small headphone-style coil on one side and then arrange
it to have gain? Does a coherer have "gain"???

Ah, the basics.

100mW into a relay can switch 1kW or so, so that's a gain of
10,000, minimum.

Cheers,
James Arthur

And 200 microjoules into a latching relay can switch 4.3 megajoules
after one day. Energy gain = 22e9, averaged power gain = 22e9,
bandwidth 12 uHz.

Relays are neat.

John



Yep, relays _are_ neat, but you're tiresome ;-)

...Jim Thompson
--
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| Analog Innovations, Inc. | et |
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