Using a Made In China Duplexes as a Notch Filter.

[KA3ODJ]

Has anybody tried this. Take a Made In China Duplexer and tune both sides for a notch
on the same frequency. Put a “T” Connector on the combined port and leave the two
other ports unterminated. If you tried this how did it work ?? Do not know if it would
make a mess out of the match or not.

I have a PNA so I guess I could try it and see.