LF Receiver work

[Terry Fox]

Anyone out there willing to help me finish my LF receiver project?  I
need help with design, breadboarding, and software.

As a reminder, it uses two of my little DDS modules, has an IF at
2.5MHz, and will produce either audio or IF signals suitable for sending
to a DSP.  I hope to use a four-stage crystal filter that is somewhat
adjustable (via varactors), but is about 50Hz wide.

I think it could be competitive with other receivers at LF, if only I
could finish it......
Terry.