A nanoVNA used to assess Xtal filter characteristics

The Nano-VNA is a powerful tool for assessing the characteristics of all types of filters, including crystal bandpass filters.  Mike ZL1AXG will discuss construction of two 12 MHz crystal filters for the Simple SSB 80m rig he is constructing in modular form and 2 filters at 4MHz for another  planned construction project.  This includes crystal selection, two different types of cohn filter and the challenges of achieving a nice shape and a passband that doesn’t have too much ripple.   He will also discuss a “universal jig” for use with the nano-VNA and when things go wrong with filters (in this case an LPF).