SMT Inductor vis. Manually Wound Air Core Coil

[Xanax]

Hi all,
I'm building some rf pre-amps but have one or two problems.

Should I use SMT inductors or Coil inductors in my tank circuit?
I used SMT before and it gave unexpected results!

Cheers,
Xanan

 

[POULINTR]

Big difference in permittivity and losses, between ferrite core and air core.