How about a regenerative superhet? Maybe use a triode/pentode tube as
a converter in front of a regen detector running at 2 or 3 MHz. If you
wanted full coverage the L.O. of the converter would be an LC
oscillator, but for ham-band only you could use a crystal oscillator
for more stability. Might be something like

6EA8 converter (triode oscillator, pentode mixer)
6EA8 detector & first audio (pentode detector w/ screen voltage
control, triode first audio)
6AQ5 or 6CU5 audio out (6CU5 will give more audio at lower B+, 6AQ5
more at higher B+)
OB2 regulator for the 6EA8s

73,
Mike, KK6GM

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