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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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TDA7294 Chip Amplifer with 6N3 Tube input

From a $48 printed circuit board and a bag of parts (eBay) I fashioned this very functional looking 80W amplifier. The parts include a 6N3 valve (preamp stage), two TDA7294 high performance power chips and all the parts required to populate the circuit board. You have to source the chassis, heatsinks and connectors yourself and that's where the expense starts.

The amplifier has been constructed in attractive charcoal black 2U 19" rack enclosure. Three sets of switchable RCAs on the back and 4 oz volume knob and Alps pot to control loudness. Speaker protection is included on the PCB and there is a delay (anti-thump) complete with flashing LED before the amp is ready for use. Very clean sound, holographic presentation.

For more details and impressions see the Chips and Tube - 6N3 and TDA7294 integrated amp thread.

Mark Houston – retro-thermionic

Class-D-SureElectronics-Amp-Inside.jpg Gobo-LM1875-Stereo-Amplifier-Kit.jpg TDA7294-chipamp-6N3-tube-input.jpg OPA2134-opamp-Headphone-Amplifier.jpg SynergyII-Cu-LM3875-Gainclone.jpg
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Album name:Chipamp, Gainclone, T-Amp and Op-amp Projects
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Date added:Oct 23, 2013
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