Small headphone amp with 12AE6A
http://www.ibiblio.org/tkan/audio/millett.html
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http://www.semifluid.com/?p=24
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http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3639
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http://frank.yueksel.org/tubes/sheets/030/d/DB7-11.pdf
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http://www.jogis-roehrenbude.de/Leserbriefe/Scope-Clock/Scope-Clock.htm
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http://www.cs.umbc.edu/~squire/cs455_l18.html
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http://www.scienceprog.com/ease-h-bridge-on-mosfet-irf7105-transistors
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http://www.scienceprog.com/connect-nokia-3310-lcd-to-lpt-port