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Chinese Duplexer as a notch filter see text.

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KA3ODJ

Newbie
Joined
Aug 16, 2017
Messages
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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.
 

RFI-EMI-GUY

Member
Joined
Dec 22, 2013
Messages
3,969
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.
You should sweep it. I think, to make it work, you would have to use both the transmit and receive ports (no time connector) . But that leaves the antenna port unterminated.

Sent from my SM-T350 using Tapatalk
 
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