[Elecraft] Power Supply for K3 ?

[Paul]

I am new to this list. I just passed my test for the Technician license and I am awaiting the call sign and license from the FCC.

I ordered a K3 100 watt kit in December so don't expect my transceiver for quite awhile by am trying to anticipate what I may need in addition to complete my station.

Is there a power supply connected right in the K3 or do you need to buy a separate one to power the K3 ?

I am reading the ARRL book "Getting Started with Ham Radio" and one of their recommendations for a Power Supply is the 
MFJ-4225 MV 25 Amp capacity. Any comments on this Power Supply ?

Appreciate any help I can get.

Thank you,
Paul