I have some times problems with local noise on the lower bands. I find a schematic in the internet for a X-Phase (QRM Eliminator). This X-Phase help really a lot!
Thanks to DK9NL for share this project!
The finish PCB board.
The under side
Build in, in a case
The back side
The front
The back side from the case. Main Antenna, Transceiver, Sub Antenna and PTT
Here you can download the schematic for the X-Phase on the website from DK9NL or on the DARC website: http://www.darc.de/distrikte/q/02/projekte/x-phase/
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