[Elecraft] KPA-500 110 or 220?

[Jim Brown]

On 8/6/2012 11:21 AM, Ron D'Eau Claire wrote:
> If the voltage rises too much the amp will shut itself down to prevent
> damage. If the key down voltage drops below 60V IMD increases and the
> maximum power available may be less than 500 watts.

This mostly an issue on 6M, where the output devices are least 
efficient, and thus requiring the most current to produce rated output.  
I get 540W out on 6M running from a 20A 120V circuit, and the DC voltage 
is a bit below the 60V keydown.  I could probably get 600W by going to 
240V, and the devices would probably run a bit cooler.  One of these 
days I may do that -- I have 240V in the shack for my Titan amps.

73, Jim K9YC