Is 20Kohms too big too drive an LM386?
why is this in the lounge? This is an on topic post, if i've ever seen one....
and i dont know the answer to your question :-D
QuoteIs 20Kohms too big too drive an LM386?
huh?
Are you saying that you have a source output impedance of 20kohms, and you want to drive an LM386 with that source?
Well, it depends on your circuit design, but given that the datasheet gives a typical input impedance of 50kohms it's probably not that good. best case scenario;
loaded voltage = unloaded voltage from source x [50k/(20k+50k)]
loaded voltage = 0.71 x unloaded voltage.
How have you calculated the output impedance? It seems very high.
I didnt calculate, I asked the person who had worked on it before me, Its for that old tube radio that tried to kill me. It works now, but I want more volume, hence the 386 question.
QuoteWell, it depends on your circuit design, but given that the datasheet gives a typical input impedance of 50kohms it's probably not that good. best case scenario;
Does this mean I should use an interstage transformer?
EDIT: I don't know why it was in the lounge, coulda sworn I was in this forum :? :) :?
QuoteIt works now, but I want more volume, hence the 386 question.
what are you proposing to do?