fake 2SK389?

[Stefanoo]

A question,

how can i make sure i have an original Toshiba 2SK389BL?
In case of power transistors/mosfets i just push them to their upper power limit and see if they can handle it, but in case of low power mosfets?


Thank you guys for the attention.

 

[Zen Mod]

A question,

how can i make sure i have an original Toshiba 2SK389BL?
In case of power transistors/mosfets i just push them to their upper power limit and see if they can handle it, but in case of low power mosfets?


Thank you guys for the attention.

procedure for Ids matching of Jfets , explained in several Papa's pdfs and numerous threads - is good enough

 

[Stefanoo]

ok, thanks!