[Elecraft] KPA500

[Bill Coleman]

On Apr 16, 2010, at 4:40 PM, Don Wilhelm wrote:

> Because not all have hamshacks that are wired for 220 volts.  If the 
> space was not wired specifically for hamshack use, there is likely to be 
> only 120 volt receptacles available.   Up to 1000 watts draw (500 watts 
> with 50% efficiency) on a normal 120 volt 15 amp circuit is practical, 
> but attempting to run more than becomes marginal.

1000 watts is only 8 1/3 amps on a circuit that can handle 15. And why max out at 15 amps? My house was built in 1994, and has 20 amp circuits and wiring throughout. 15 amps is likely only the limit of the plug. I have successfully run my camping trailer's air conditioner off one of these outlets. I've measured it at 1400 watts draw at about 12 amps. 

There are hair dryers that draw more current than this. At 1500 watt draw is not unreasonable from a 120v outlet.

Ironically, the only 15 amp circuit in my house is on the 240 volt outlet for my current amplifier.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901