Hi all,
there is a slight modification needed on the PCB Ver. 5_11. Version No. may be found at the solder side of the PCB.
Robert has suggested a small mod in case if you're using a small rubber duck antenna with Weekend radio project. In this case it can happen that TX will keep staying on although microphone PTT switch was released. To solve that problem you can solder one resistor and one capacitor on the solder side as seen on the image below.
S57D Milos has done this modification very clever - see the image below:
He connected this to programming socket.
Enjoy your Weekend radio project.
73 de Jure, S52CQ