My previously used pre-amplifier (the one in front of the final PA) only delivers a gain of abt. 9dB @2.4GHz. This was far too less for my final PA used.
I found this amplifier on AliExpress. It delivers a solid gain:
This email address is being protected from spambots. You need JavaScript enabled to view it. This email address is being protected from spambots. You need JavaScript enabled to view it. - 26dB@435MHz
The performance matches excellent to the given gain of
With this new pre-amplifier I now get 2W@2,4GHz to the dish - the QSOs have to show :-)