Al so you know what I want to do... mechanical adjust in the coils.
I want to have a Antenna Amp Stage with 2 Coils Input, 1 Coil in its output, a oscillator ( may be not only one coil filter, the signal must be very clean from foreign things, so i can use also multiple stage coil filter there), the IF Stages will be fixed at 10MHz, at last Ratio Detector, following a small Audio Amp 6AQ5 or like that
May be a little magic eye for tuning beside.
So i think there will be 5 mechanical moved coil filters connected to the tuning knob. The hole radio must be small, like "Philetta", and homebrewed case of coarse also. A lot of work, but this work is the enjoyment.
As tubes, 7pin Miniatures.
Martin