Hi again.......I should have added my K2 is "full house" with KNB2, KSB2, KPA100, KDSP2 , K160RX, and the outboard KAT100. I have also tried two different supply sources and the indicated voltage using "Display" is 13.2v. Everything used to work fine with the set powered from either supply jack. Cheers...Ron ZL1TW