DIY AUDIO SCHEMATICS
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By no means with this ever be a comprehensive Hi-Fi Audio Schematics Repository. Here you will find some schematics for various DIY Audio Projects and some commercial Hi-Fi components that I find interesting. See the links at the bottom of this page for websites with a large schematics collection. If you have a schematic that you would like to share, please contact me.
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DIY Audio Schematics
Tube Preamplifiers
- 6DJ8 / ECC88 / E88CC SRPP Tube Preamplifier - (PNG 13kB)
- 5687 LED Biased Tube Preamplifier Project - (Documented Project)
- 12AX7 Tube Preamplifier Project - (Documented Project with Testing)
Tube Amplifiers
- Mikael Abdellah's Single Ended (SE) KT88 Tube Amplifier - (PNG 17kB)
- KT88 Single Ended (SE) Tube Amplifier Project - (Documented Project)
- EL34 Single Ended (SE) Tube Amplifier Schematic - (PNG 49kB)
- Single Ended (SE) 6V6 Tube Amplifier Schematic - (PNG 26kB)
- Mullard Single Ended (SE) EL84 Tube Amplifier Schematic - (PNG 24kB)
- Push-Pull (PP) EL84 Tube Amplifier Schematic - (PNG 46kB)
- EL84 Push Pull (PP) Tube Amplifier Project - (Documented Project with Testing)
- Single Ended (SE) 2A3 Tube Amp Schematic - (PNG 37kB)
- KT77 Push Pull (PP) Tube Amplifier Project - (Documented Project with Testing)
- 6T9 Tube Amplifier Project - (Documented Project with Testing)
Hybrid Amplifiers (Tubes mixed with Solid State)
- 12AU7 Tube / IRF612 MOSFET Headphone Amp - (Documented Project with Testing)
Commercial Hi-Fi Products
At the request of NAD Electronics / Lenbrook America, we have removed the NAD Service Manuals and Schematics from this site. For more information on this matter, please see NAD Service Manuals and Schematics.
Tube Amplifiers
- Dynaco ST53 Tube Amplifier Schematic - (PNG 174kB)
- Dynaco ST70 Tube Amplifier Schematic - (PNG 20kB)
Headphone Amplifiers
- Grado RA1 Headphone Amplifier Schematic - (External Link)
- Class A MOSFET Headphone Amplifier Project - (Documented Project with Testing)
Links
- eserviceinfo.com - HUGE collection of schematics - (External Link)
- vintage-radio.info - Heathkit Schematic Diagram Archive - (External Link)