I'm working on FM transmitters/receivers, and I see instructions for making one's own inductors for them. On one it says the inductor is about 0.1uH. Can I just buy a 0.1u inductor (or a 0.056uH in another design), SMT types, or is there something special about the handmade ones? If I'm picking inductors for RF applications, what should I look for? The one I picked out is 1210, and it says it is air core. Digikey p/ns PCD1119CT-ND and PCD1116CT-ND.