I made a BpBr style duplexer from an Aerial Facilities Limited combiner. Had 4 Band pass cavities that were about 8" square.
Removed one coupling loop and made the other bigger with a johansen trimmer capacitor to set the notch. About the only problem it the coupling loop still rotates so it has to be set for maximum coupling and locked down tight. Seems to do about 85dB of rejection per leg. It's a little big compared to the Sinclair 220 duplexer, but at $20 a cavity I cant complain. On Wed, Dec 31, 2008 at 8:42 AM, Joe <k1ike_m...@snet.net> wrote: > I have an opportunity to get a combiner/filter panel from a 220-222Mhz > ACSSB system that was abandoned years ago. Has anyone experimented with > making a 222Mhz duplexer out of the parts in the Celwave rack that was > used in this system? > > 73, Joe, K1ike > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
