Posted by Phil Salas on URL: http://elecraft.85.s1.nabble.com/K3-Switching-Power-Supply-tp2975885.html
OK - I've not heard any switching power supply noise from the SEC-1235 on
any band from 160-6 meters.
Phil - AD5X
"It would be useful for those who use switching power supplies to
mention on what band(s) they've noted no switching noise with their
particular choice."