SR V7 as an IF subsysytem
- My miniSDR...
I wanted to cover a fair portion of the HF spectrum for shortwave and
DRM as well as monitoring the ham bands. I sarted out with an AD9835
DDS chip (not the greatest but what I had on hand) feeding an SBL-1
mixer and a small IF amp. Then on to the Softrock V7 operating at
20.600mhz. I originally used a 21.4mhz IF and crystal filter but
wanted to see a bigger chunk of the IF spectrum and I had some
20.600mhz crystals left over from a previous project so I scrapped
the filter and set up the Softrock for 20.6. I use a low pass filter
at about 20mhz at the antenna. If and when I want to listen higher I
can swap the LP filter for a HP and listen to the image side. Cool.