The regenerative superhet described by Mike is a good idea. it is known as
the "super gainer" and was pioneered by Frank Jones. They are described in
the 1938 Radio Handbook. The converter in front of the regen receiver
substantially reduces radiation by the receiver and also eliminates the
effect of a swaying antenna. By setting the fixed if between two amateur
bands, both bands can be covered with one oscillator coil. The drawback is
an increase in parts count .

For some, simplicity becomes elegance. There is nothing like honing your
skills during a gusty evening, where the open oscillator coil changes pitch
with each puff of wind and your movement around the room. For those, a
digitally locked oscillator is heresy.

Colin K7FM