I still use 1 mH chokes instead of the 3.3 mH as in your schematic. The drain current is the same. I think this fet can also be used in the 10 GHz version. For 10 GHz I recommend to use semi rigid. This is easely available also on flea markets.
Portable work is usually at extreme temperatures.
I look forward to build the 10 GHz version and maybe I can give you some usefull feedback. So the oscillation is no longer there. I intend to replace the chockes with resisitors and a somewhat lower gain is prefered above instability. This needs to be seen when we test the antennas. Let me know how you prefer that I arrange payment.