Time For Some Yaesu FT-857D Bling…Adding A Somewhat Homemade 500Hz Rockwell Collins Mechanical CW Filter (526-8693-010; YF-122C)
I told you exactly how to do this for the Yaesu FT-818nd here. In essence you need to acquire a custom made printed circuit board from a man in Poland and you need to order a filter on Ebay from Japan. Then you solder the two parts together in 3 places. That is it! The …