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Old 19th August 2008, 02:08 AM   #1
lineup is offline lineup  Sweden
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Smile Solid State discrete Mic amp, Gain x100, for 9 Volt battery

this is my first project
in my new audio blog

for more details you may visit lineup audio blog
my blog is public to guests
.. while all our other audio projects in forum is for members only


hope you like this little nice amplifier
it qualifies almost as hi-fi
as much hi-fi we can get from 4 small standard TO-92 transistors
as said, some more details for you, for free, is in my blog

and here is the schematic which is free for any diy non-commercial use
Click the image to open in full size.


regards lineup
his new diy audio blog:
http://lineupaudio.freehostia.com/fo...hp?action=blog
.
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Old 19th August 2008, 06:51 AM   #2
Electrons are yellow and more is better!
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It will be interesting to see something from you since I haven't seen anything yet.... homepage with zero content only a church.
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Old 20th August 2008, 12:03 AM   #3
lineup is offline lineup  Sweden
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Smile Lineup Microphone Amplifier with emitter input

.
here's the square 1 kHz at +-140 mV peak
with a slightly capacitive loading = 1 nF ( 1000 pF )

Enjoy!

My Article:
Lineup Mic Amp Special details

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File Type: png lineup_micemitteramp-3c_squarewave.png (6.5 KB, 59 views)
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Old 20th August 2008, 08:15 AM   #4
Bonsai is offline Bonsai  Taiwan
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Lineup, looks like you are taking the output from the collector of Q1 and not the emiiter of Q4. Am I correct?

Why?
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