More activity near 3.4GHz means a filter is now required to receive GB3KM.
In the past we have just used an LNB alone pointing towards KM with no issues.
A simple filter design was found here:
http://www.g4jnt.com/evanfilt.pdf
Clive G4FVP made two of these and they tune up pretty well.
Slightly more loss than the design suggests but not bad at all!
We made a couple of 3d printed end caps to keep the spiders out too 😉
