Merlynn,
So, apparently, you won't be telling us what you think happens when two transistors are connected in series. OK...
Having read your posts, I have to ask, what is your level of expertise in the field of electronics?
Can you describe how a BJT connected as a simple common emitter circuit operates? Can you tell us how we achieve "gain" in that circuit and how we measure it? Not with all your talk of vibrations, but as is currently understood in the field of electronics.
It would seem to me, that before anyone can tell us our current understanding of electronics is incorrect, they must first know what that current understanding is.
Again, having read your posts, it appears that you do not really understand how we achieve gain with a transistor or a simple thermionic triode. As well, it appears that you do not understand the concept of antenna gain.
Please clarify the above if my impressions are incorrect.
Regarding the pdf doc attached to your OP in this thread, can you tell us how the phototransistor was connected while performing your laser measurements? I have a feeling you thought a phototransistor produced an output voltage related to luminance (somewhat like a solar cell) instead of understanding it actually varies its current (not voltage) with luminance.
Again, please clarify if my impression is incorrect.
PW
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