[Elecraft] Question about the K2

[Don Wilhelm]

  Jim,

That caveat is not required.  The K2 will detect the KPA100 when it is 
powered on.  If there is no power to the KPA100 you will see the message 
"NO PA POWER".  But if power is later applied to the KPA100, it will 
come on-line and provide full power output.  This switching is 
automatic, and available for those operating with the KPA100 mounted 
either on the base K2 or externally.

In other words, the K2 with the KPA100 is designed so if you operate the 
KPA100 with a power supply running on the AC mains, and power the base 
K2 from a battery, should the mains power go out during a QSO, the 
KPA100 will drop out and the base K2 will still be powered from the 
battery, enabling the QSO to continue even with the lower power out of 
the base K2.  There is a test sequence in the KPA100 manual to verify 
this power switching mechanism.

73,
Don W3FPR

On 3/28/2011 6:07 PM, Jim Wiley wrote:
> The only caveat is that when running high power you have to make sure
> that power is applied to both the K2 and the KPA100 before turning the
> rig on with the front panel switch -  otherwise, the K2 will not detect
> the presence of the amplifier, and will not switch from one to the other
> as needed.
>