Hi, Just a quick update on my build. I just finished the low pass filters and the relay switching. Next step is the mixer! I have just tested the relay but did not characterize the filters tonight. Will do that later. This is really a great experience. I am learning a lot on homebrewing and radio with each stage. I highly encourage everyone to give this project a try! [image: Inline image 1] [image: Inline image 2] 73, thomas - kk6aht