Re: [amsat-bb] Interference problem RX/TX

["OZ1SKY Brian" <amsat-bb1@xxxxxxxxxxxxxxxxx>]

Hello Again.

Ive tryed the duplex filters.
This like the drawing on http://www.amsat.org/amsat-new/echo/ModeJ.php , 
only i didnt have a dummyload for the unsued 2m output of the duplex flter.

I did some ruff tests before i connected it, 100watt FM TX and USB RX mode.

Uplink/Downlink
145920FM/436800USB = S 5 QRM
145920FM/436000USB= S 9+10 QRM
145920FM/435825USB= S 9+40 QRM

After the duplexer was connected:

Uplink/Downlink
145920FM/436800USB = S <1 QRM
145920FM/436000USB= S  <1 QRM
145920FM/435825USB= S <1 QRM

This worked realy well.

Thanks.

Regards
Brian OZ1SKY 
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org