[Elecraft] Neat little switching power supply

[Phil Wheeler]

Eric Williams wrote:

> I picked up a Toshiba laptop switching power supply for my K2 on 
> ebay.  It's model PA2450U, and has a rated output of 15V 3A.  On the 
> K2, full-power key-down into a dummy load gives a reading on the 
> display of 14.1V and 2.5A with a good clean tone.  I paid $20 plus 
> shipping for it. 


Generally the issue is RFI on receive from these small switchers.  Not 
such a problem with remote (e.g., coax fed) antennas, but it can be with 
the sort of wire antennas recommended for the KX1.  Likely the wider 
bandpass for SWBC listening is another issue.

The one I've used for some time with my K1 is definitely not what I will 
use with the KX1.  I'm hoping the one from MorseExpress will do the job 
RFI-wise.

73, Phil