I built a WA2EBY amp for my BITX40 and it works well. ?I adjusted the output of the BITX to 5W, then initially used the pad built into the amp to drop the power to 1W. ?I've since moved the pad off-board into a small box so I can use the amp with my WSPR gear.
Definitely use KC0WOX' pages and parts list - it makes the project very easy. ?A note for the latest boards from Far Circuits: ?they include brass grommets to solder for ground 'vias' - makes it easy. ?There's a ground missing on the low-pass filter board in the center of the rotary switch, though - you'll have to run a wire from the ground plane on back side of the board to the middle of the switch. ?This might or might not apply to the kit board, though.
??
