10 Watt Stereo Power Amp and Preamp
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10 Watt Stereo Power Amp and Preamp

10 Watt Stereo Power Amp and Preamp

Description:

Published: April 29, 2018 1 0 469
By: Joseph Erdy, Cal Poly San Luis Obispo
Category: Engineering
Hashtags: #Analog #AnalogCircuitDesign #Audio #audioamp #audiodesign #audioengineer #Design #Electrical #Engineering #hifi #LTspice #Mechanical #MechanicalEngineering #Music #Project #PSpice #Solidworks #vacuumtubeaudio #vacuumtubes #Woodwork #Woodworking

I started this project out of the need for a hifi stereo system capable of modest power output. I had obtained a nice collection of antique tubes, transformers, and chokes somewhat prior and was looking to put them to use. I designed the power amp around a push-pull topology using 6V6GT beam power tetrodes. The cathode circuits of the output tubes have independent transistor constant current sources that keep the output balanced and also allow for drop-in compatibility with any reasonably similar tubes. Due to power constraints of the transformer used, I was not able to fit the preamp in the same chassis, so it was redesigned and made external with its own dedicated power supply.

Attachments:

Power Amp Circuit Schematic 41.3 KB

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