I realise that you are after a passive solution but I wonder if an
op-amp or two in a Q multiplier configuration *for the first band) might
be a better idea? You could then tune the feedback/gain of the device
with a R/C combination rather than large values of L. You could of
course set the gain to 1 if you wanted.

Just an idle thought.

Cheers Bob W5/VK2YQA

TRABEM wrote:

I need an LF to 30 Khz preselector (passive) for a homebrewed receiver
I'm building. I have most of the details worked out, but I am stuck on
the preselector design.