[hpsdr] shielded radios

[stoskopf at tri.net]

>
> My guess is that no-shielding at all is required
> Can anyone think of a radio that is built with magnetic
> shielding around its front end band bass filters?
>

You need to take a look at those pre-WW2 boat anchors, Naval Receivers
which used shielding and the RF stages to prevent LO radiation.  Shielding
and filtering deluxe, but obviously not for the same reason.

N0UU