Hi all,
What is curious is that I tested the FET on my curve tracer, and it looked OK - both FETs display near identical curves (Id over Uds as well as Id over Ugs) and the curves do look normal and very close to spec. The only moment they differ is when I switch to "base open" on the tracer. The grid voltage of the good FET starts to float a bit towards positive with very high impedance, whereas the bad FET goes much more to positive and with much lower impedance... clearly shot!
See the photos section, I added some screenshots there.
cheers
Martin
Martin