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Old February 9th 08, 04:50 AM posted to rec.radio.shortwave
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Default Power amps/watts consumption query?


"Brenda Ann" wrote in message
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"The Shadow" wrote in message
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Golly Brenda how does
210VA = 95.55W
850VA = 386.75W

wikipedia on volt-ampere
A volt-ampere in electrical terms, means the amount of apparent power in
an alternating current circuit equal to a current of one ampere at an emf
of one volt. It is equivalent to watts for non-reactive circuits.

Are you using peak, rms, or average factors?

I assume the VA figures given by John are rms values


The calculator used assumes a power factor of .70. It is right in line
with the calculations used for USP'es in their V/A to W conversions.


Very good Brenda -- agree if we take into account power factor. I assumed a
resistive load

Also folks note the ICOM 7700 is a 200 Watt Radio and uses a switching power
supply. Finals take 42 Volts

Lamont




 
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