Building from scratch could be fun.
But easy enough to mod the Bitx40 for use on 20 meters. ?Only changes required would be the bandpass filter at L1,L2,L3 and the output lowpass filter at L6,L7, just borrow coil and cap values from old 20 meter versions. ?Also need a minor hack to the Raduino sketch to move the VFO frequency. ?Alternately, sit on your hands till the all-band uBitx comes out.
