Jamie wrote:

(HIT) NPN 60V 8A TRANSISTOR T0-220
Vcbo = 60v
Vbeo = 5 v
Pc = 25w/
etc..
etc..
looks like a generic 2n3055 type..

You missed ft = 50 MHz.

Not like a 3055 at all.

I notice your 'advice' seems to be regularly flawed. I suggest you take more
care.

Graham