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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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Super Simple Single Stage (4S) 12AU7 Tube Preamplifier

Here is my second attempt at the Super Simple Single Stage (4S) 12AU7 Tube Preamplifier. The internal layout is a lot neater and some values have been changed which better work with the 12AU7 tube. The sound is good but not as good as the first build. But that depends on the tube in place. The 12AU7 Golden Dragon (GD) is bright and detailed the 12AU7 CONN organ tube mellow and harmonically rich. The finish on the case is Epoxy Enamel Beaten Copper. Alps pot and black heavy weight solid brass knob. Again powered by a 24VAC wall wart. The third this has been built and a Universal 4th is too come.

I have built a number of these now and full information is available in the Super Simple Single Stage (4S) tube preamplifier thread on the forum.

Mark Houston (Australia)
http://www.retro-thermionic.blogspot.com/

Stereo_and_Seas_FA22RCZ_in_Open_Speaker_Enclosure.jpg Seas_FA22RCZ_in_Open_Speaker_Cabinet.jpg 12AU7_Super_Simple_Single_Stage_284S29_Tube_Preamplifier.jpg B2BO_ICEPower_1000ASP_modules_Par-Metal_Case.jpg B2BO_ICEPower_1000ASP_modules_.jpg
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Filename:12AU7_Super_Simple_Single_Stage_284S29_Tube_Preamplifier.jpg
Album name:Vacuum Tube (Valve) Audio Projects
Filesize:69 KiB
Date added:Jul 23, 2011
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URL:http://diyaudioprojects.com/Gallery/displayimage.php?pid=684
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