In no way am I questioning the strategies you and the team are working through. But can you educate me as to why uBitx doesn¡¯t just use programming to simply select the appropriate band-specific low-pass filter such as presented by this 9-band $34 kit at ? Will low-pass filters not correct the spurs generated as well as harmonics? Thanks for sharing your wisdom.
Right now this is just a test to see what the results look like and "if there is a pony in the room". We may just provide the Gerber files, the LPF Relay boards, A complete LPF upgrade kit (not sure I can handle the potential demand after the AGC/Click activity), or just give it to someone else to run with ...?