Also have a look at https://www.dk3wn.info/wp/equipment/mode-j-filter/
I am still having desense on my UHF downlink on the IC-9700. Antenna is a 30 element M2 CP Yagi with SSB Preamp at the antenna.I have yet to check connections at the end for any problems, but will do so.Connectos are all Type N on system.Is there any better option than the Comet CF-416C diplexer to help or even eliminate the 2M uplink from desensing the 70CM downlink ?I would have to weatherize it to ensure longlife, etc. Perhaps there is a sealed inline filter that would handle the capability of theradio which is 75 watts out on 70CM. Anyone with info pleae share with me.TnxJerry KJ4EU