In downloading these data were delivered to me: roll:

HV electrical .Elektronik-kompendium.de/Forum/board_entry.php?id=16442&page=0&order=time&category=all

Read the sixth post...Can 16A, right...is funny.

So my 2N3773 live still. I read often in the Internet, you should use the 2N3773 instead of the 2N3055.

The 2N3772 is similar to the 2N3055, the 2N3771 40V at 30A...

The 2N3055 Ahmad simply not purposes are those (or to protect him with VDR's or Zener diodes). For high voltage generation taking transistors that can handle high voltages. In TV's z.B can the transistor 1500V (BU508, formerly BU208, BUXXX(X)...).

.schaden it's probably not, it wouldn't it be conceivable but the parts not directly from an induced voltage on the wiring being killed but indirectly by the electric field which is located in the immediate vicinity of the HV transformer.

Such transistor gets with unequal potential of its ports then using ionized air easily a blow out missed, needs much electricity to flow in Garnich times, it reaches the 2N3055 due to its low HFE values especially when transistors bekantlich already made only one of his limits to cross and even isser gekillt...wobei grad there still relatively unempfindich for is to be killed.

Tesla e.g. won't transformers needlessly warned in its mobile operation or watch in which close to belassen...wo starting to light incandescent lamps in HV transformer unprotected transistors seem to have no chance.

It would probably only make then what to protect the transistor with a shielded metal housing which is located geographically further away from the HV transformer. An empty geraeumtes of PC switching power supply part case e.g. for suitable, bother funzen mounted there a thickness heat sink.