[SATLUG] Home network

Jonathan Hull masterr at gmail.com
Mon Apr 14 10:34:30 CDT 2008


Yeah I forget the symbols. The important part for me was the actual
formula, heh.

But I suppose I should be correct and proper to not look dumb in the future.

-Jon

On 4/14/08, Geoff <geoff at w5omr.shacknet.nu> wrote:
> Jonathan Hull wrote:
>
> > Whoopse, I just realise I said the wrong thing about calculating
> > wattage. Do Amps * Volts. Not Volts / Amps. Heh.
> >
> > So if amp-meter says .5, it is 110v * .5a = 55w.
> >
>
>  In the world of Electronics, the symbol for Current is "I" (measured in
> Amperes, or Amps.)
>  For Power, it's "P" (measured in Watts)
>  The Electromotive Force, or Voltage is depicted by an E. (later text-books
> have changed this to "V" for Volts, but change is slow to occur in the more
> 'seasoned' electronics people.
>
>  So, with P for Power, I for current, and E for Volts, figuring power is as
> easy as PIE, or...
>
>  P=I*E
>
>  For a Ham Radio operator who builds his own transmitting equipment (such as
> myself) this formula is used to the extent of where it's simply second
> nature to know that
>  if there were 2000 volts on the plates of a pair of tubes, that were
> drawing/consuming 500mA (half of an amp) that the wattage would be 1,000
> watts.
>
>  It's just as easy if you were only using 12v on a solid state device, that
> was drawing somewhere in the neighborhood of 83 amps.  Pretty close to the
> same power consumption.
>
>  --
>  73 = Best Regards,
>  -Geoff/W5OMR
>
>
>
>  --
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