Prototype Radio II

I continued on the proto-board radio modules and constructed the first version of a direct conversion receiver. In the picture item #1 is the LCD I2C display, #2 is the rotary encoder, #3 is the Teensy 2.0, #4 is the SA612 mixer, and #5 is a 10 db attenuator pad for the Si5351 clock module to the right of the teensy. I drove a amplified speaker right from the output of the mixer. This does work and I copied strong CW and SSB signals.

A audio buffer amp is needed and tests will be done with SDR software next weekend.