Bill Powell wrote:
I'm seeking information about using 2 or more closely spaced SM
inductors (unshielded - not torid or shielded) in a bandpass circuit.

The application I'm thinking of would use two closely spaced SM
inductors and varicaps to tune both the center frequency and bandpass
and allow simple and repeatable construction without the need to
locate and wind torids or find specialty inductors.

Please - experiences and not pure speculation.

Thanks,
Bill - WB1GOT

I have gotten 80 dB rejection from 80 MHz to 500 MHz (the limit of the
network analyzer) in a 23 MHz 7th order butterworth filter I built
using 4 surface mount inductors in a 20 mm line. I would give it a try.

--
Darrell Harmon
http://dlharmon.com