Yes Bob I realise I am stretching it a bit hence the rather extream
variation in emitter resistance.
However it works for my purposes and no doubt others would like a simple
means of getting a "fine" adjustment.
Regarding the mechanism behind your idea, is it possibly a form of "Miller"
effect as in valve technology.
Does the base emitter capacitance change with a change in emitter current?
Perhaps one of the more knowledgeable members of this group could offer an
Once again thanks, 73 Laurie.