[Elecraft] More power for K2

[gwwhatley at juno.com]

I came into a cheap old Yaesu FP 107E power supply which works fine, except for somewhat low voltage output.  I notice the transformer has several taps, but I'm afraid to mess with it, since I have no manual.  
 
I would be beholden to anyone who has a manual for this unit, and would be so kind as to send info on how to change the taps for higher voltage.  Also, a copy of the schematic would be nice.  
 
Many thanks, George, N4YM