[SATLUG] Home network
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
But I suppose I should be correct and proper to not look dumb in the future.
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...
> 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
> 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,
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