#8816
LectronFan
Moderator

Hi Bbarry,

This just comes to me : is it possible that you used a different light bulb ?

It should be a 6V and 50mA light bulb. Other types may destruct your transistors.

The Base-Emitter junction is quite delicate and can not handle more then a certain milli ampères .

I will make more tests and measurements this evening and will let you know.

Greetings,

Frank