I own the Flight aware cavity filter, and its great: amazon.com/ADS-B-1090MHz-Ba … B010GBQXK8
I just got a uKeg 128, and I have a bunch of 16gram Co2 cartridges laying around, and trying to think of a good use for them…
I’m thinking that I could make some cavity filters for ADSB or Hydrogen line radio astronomy, and publish design for anyone to use.
Would it be possible to get documentation on your current design? Curious what it looks like inside.