where can I get 50-300 uH adjustable coils?
Its a design that comes from Popular Electronics November 1967 Issue (http://bit.ly/gNaQVH). It calls for 50-300 uH adjustable coils and I can't find 'em anywhere.
I have found adjustable coils/variable inductors but I haven't been able to find any with this inductance rating.
Aside from building my own, I'm at a loss here.