Here's a comparison between two power supplies running FSKCW on my U3S (Single band, w/ 5W PA kit outputting 2W TPO). Top image is with a switching supply (Radio Shack 19A). Bottom image is with homebrew 3A linear supply with KD1JV's regulator circuit. (). Linear looks not as ragged with a lot less noise.
?Switcher PS:???
Linear PS:? ? ???
Cheers!
--Al
WD4AH
