My QMX is now fried. So for me it's 'Game over - no lives left'. I suspect you might have a hard time doing 17m-10m with a single LPF because the second harmonic of 2x18.068MHz isn't many octaves above 29.7MHz. If you're looking for 20dB or so of second harmonic attenuation then groups like [80m/60m], [40m/30m] and [20m/17m/15m] work quite well. As does [15m/12/10m]. It would be nice if there were some kind of 'balance' adjustment on the PA to null out the even harmonics.
