As you can see from the spectrum analyzer pictures below, INRAD filters have both a better formfactor (they are steeper) and a lower ultimate rejection level.
This seems to be true for the 2.2 / 2.4Kc and the 1.8Kc
Notice that the INRAD filters are a bit bigger. Nevertheless they fit neatly into the TS570.
Go to the INRAD Webpage
Back to the modifications main page