So I'm making a theremin for myself and encountered the age-old problem of obsolete parts. None of the 5 inductors listed are actually available.
These are:
10 mH, 3-section, RIF choke(J. W. Miller #6306)
100 pH, hi-Q, variable inductor(Toko RWRS-T1015Z)
2.5 mH, 3-section, RIF choke(J. W. M i ller #6302)
5 mH, 3-section, RF choke(J. W. Miller #6304)
68 μH, hi-Q, variable inductor(Toko 154ANS-T1019Z)
Now, I know I won't be finding these anywhere, so I have to replace them. The question is: how? Each of these inductors has a different job. What specs matter and which don't? I suspect that the hi-Q ones need, well, a high Q. But what about the 3-section RIF chokes? Does the resonant frequency matter? The Q? How much can the inductance vary? Sorry for asking so many questions but I have barely started and I already found a roadblock. Thanks!