Mike Andrews wrote:

I've got an RFSpace, Inc. SDR-IQ Software Defined Radio, which is a
truly nifty gadget, but it stops at 30 MHz. I'd like to put together a
downconverter that I can drive with a DDS LO or my HP 8640B, to pull the
stuff above 30 MHz down into some part of the HF (or lower) spectrum. It
would be nice to be able to see a 190 KHz chunk of 6m or 2m or 70 cm., as
I can with the spectrum below 30 MHz.


I have considered using subassemblies from C-band satellite receivers for
a similar task; the bandwidth may not be as great but certainly useful
for some tasks, and the tuning range is substantial (sorry I don't have
useful numbers while I am posting this).

Regards,

Michael