220DuplexerPart2

Part 2 of 220 Mhz ham radio VHF repeater duplexer rehab. This video is of rough-in and fine tuning of band pass and notch frequencies using a Nano VNA for tuning. This video was recorded over 2 hours of tuning, tweaking and adjusting, and condensed into 5 minutes. I hope this gives you some understanding of the theory of duplexers and the crankyness of the tuning.