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From: ejbehr@rs6000.cmp.ilstu.edu (Eric Behr)
Newsgroups: sci.electronics
Subject: Low power amp for an electret mike
Message-ID: <1991May28.000116.4062@rs6000.cmp.ilstu.edu>
Date: 28 May 91 00:01:16 GMT
Reply-To: ejbehr@rs6000.cmp.ilstu.edu (Eric Behr)
Organization: Central Illinois Surfing Club
Lines: 12

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