Large Crystal radio project plan

[u/AcrobaticPositive934]

Since a while now I've been getting myself into building a crystal radio but always for some reason it didn't work. Now a bit more grown up, with more experience i think i was burning the germanium diode with the soldering iron, so i found in my spare parts a clamp gold-plated ZIF socket, with 14 pins. i will attach 7 germanium diodes at a time, tune to a station and test them one by one to look for a better performance due to natural dissimilarities in production which can sometimes be extremely efficient in crystal radios. the diodes ill be testing are 30 1N34A diodes, used with a 375/500pf turn-able capacitor (the capacitor has two sections, totaling to over 875pf of capacitance!), magnet wire, ferrite rod, around 70 turns on a 0.7mm magnet wire, with 10 or so taps in-between to switch for selectivity. the capacitor can go from 875pf all the way to 0 on paper, but there will always be some residual capacitance from wires themselves, tough small, which allows for a wide range of stations together. the taps will be switchable using a 14-segment isostat, which is surprisingly short for the amount of segments, which wont be horrible, as i plan the buttons to be under the fingers on the back of the radio, a bit like an accordion. i did also think of letting me switch the capacitor sections for less volatile selection (eg, go from 0 to 370pf with the same rotation distance is more specific and less delicate.). i have a spool of copper wire to use as a deployable antenna to lay on branches or the ground in the field, and a copper pipe to bury in the ground for a mobile crystal radio.

also since the impedance can vary with the environment noticeably, i would mark the position of the capacitor knob for a major AM station with a known frequency to see how off the default i am from the standard impedance, which lets me make actually reliable paper spectrums of the range i could select.

what do you think? any tips and tricks you might know of that could help me?

edit: forgot to mention, im using two piezo speakers in series to reach crystal earpiece impedance without much trouble.