As you have noticed there is no test after step 5. We can test the AF filter if the PSoC processor is intalled. This PSoC-thing have a 690 Hz hard-coded filter so some experience in tuning is required. Also in the test procedure a frequency generator is mentioned…. oh brother I don’t have this piece of testing equipment! Lets try to hook it up to the Icom IC-706 and keep the fingers crossed… If the audio level is to low there is nothing to see but at a audio level to high it goes in overload and the most right LED will lit.

But first we heve to solder this PSoC-thing onto the board. It comes with a 8 pin socket so no worry we will damage the microprocessor with the hot iron.

So the PSoC-thing is in place… lets test….

So up to step 7 then…