[Elecraft] Items you think you can depend on

[Jim Brown]

On 9/4/2017 3:40 PM, Don Wilhelm wrote:
> But I do know that if one is operating the KPA1500 in a commercial 
> building with 3 phase service, the voltage is 120/208.

Not always.  In much of the US, power is distributed as "high-leg Delta" 
(sometimes called "wild leg).  Three-phase customers get 240V Delta, 
single phase customers get 120-240 from a center-tapped transformer fed 
by one of the sides of the Delta. Neutral is established by the center 
tap. This configuration is widely used in cities, and is what serves me 
in the Santa Cruz Mountains.

> The KPA1500 power supply is a switcher, and most switchers can 
> tolerate a wide variation in input AC voltage. 

And the KPA500 power transformer can be tapped for a fairly wide range 
of supply voltages.

73, Jim K9YC