Small headphone amp with 12AE6A
http://www.ibiblio.org/tkan/audio/millett.html
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http://www.triodeel.com/schindex.htm
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http://members.chello.nl/~m.heijligers/DAChtml/dactop.htm
Lot of good articles on tube amps (meanly distortion oriented)
http://www.angelfire.com/electronic/funwithtubes/index.html
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http://www.bonavolta.ch/hobby/en/audio/audioel.htm#Amps
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http://www.scienceprog.com/avr-based-tda7313-audio-processor-control
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http://www.avrfreaks.net/index.php?mo...t×tamp=2007-08-10%2015:10:40
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http://www.subatomicglue.com/mintymic/#protoboard
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http://www.troelsgravesen.dk/Diy_Loudspeaker_Projects.htm
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http://www.diyaudioprojects.com/Chip/AMP6-DIY-T-Amp-Kit