[sci.electronics] Low power amp for an electret mike

ejbehr@rs6000.cmp.ilstu.edu (Eric Behr) (05/28/91)

Hi; I'm trying to make a simple intercom out of parts I have lying around.
I want to use one of the electret mike elements (Radio Shack?) I put
together an amplifier around the LM 386, with maximum gain. The output is
still a tad low. What is the best way to boost it? I tried a generic op-amp
pre-amplifier, or adding a single transistor stage - but I guess I'm not
matching the impedances right, or something. Any help would be appreciated.

PS. You can see I'm a novice, so please be gentle...

-- 
Eric Behr, Illinois State University, Mathematics Department
Internet: ejbehr@rs6000.cmp.ilstu.edu    Bitnet: ebehr@ilstu