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DIY 12AU7 Tube Preamplifier Project - DIY AUDIO …
https://diyaudioprojects.com/Tubes/12AX7-12AU7-Tube-Preamp/
This is a high gain preamplifier that is suitable for use where a lot of gain is required - to drive a power amplifier that needs plenty of gain or perhaps for use with instruments, like a guitar or microphone. If you need less gain, take a look at the RCA 12AU7 / ECC82 Cathode Follower Tube Preamp Schematic which has a gain of about 8.
NP-100v12: DIY 12AU7 (ECC82) Tube / IRF510 MOSFET ...
https://diyaudioprojects.com/Solid/12AU7-IRF510-LM317-Headamp/
DIY 12AU7 (ECC82) Tube / IRF510 MOSFET Headphone Amplifier The NP-100v12 is a simple headphone amplifier that allows an entry level builder to experience assembling and listening to their own creation. I use the term builder as electronic experience combined with innovation which allows the creation of a device, rather than simple board stuffing.
DIY Audio Projects Forum • 12AU7 / IRF612 Headphone Amp ...
https://diyaudioprojects.com/Forum/viewtopic.php?t=126
Location: Denver, Colorado. 12 April 2010: See NP-100v12: DIY 12AU7 (ECC82) Tube / IRF510 MOSFET Headphone Amplifier for the latest update to this project. I have an update to the 12AU7 / IRF612 headphone amp hybrid I made, this one is smaller and has less parts. It is a great design for a new builder who wants tube sound at a low price.
12AU7 Cathode Follower Preamp - diyAudio
https://www.diyaudio.com/community/threads/12au7-cathode-follower-preamp.338026/
The 12AU7 contains non-linear triodes. As such, the type makes a poor voltage amplifier. Given 100% local current NFB, the 'U7 is OK in the cathode follower role. If you really need line stage gain, the linked PCB will work fine, with 12BH7 s populating the sockets. You will need double the heater current. I'm old fashioned, sue me.
Elekit TU-8500DX 12AU7 Pre-Amplifier Kit – diyAudio Store
https://diyaudiostore.com/products/elekit-tu-8500
Line stage features: Two 12AU7 (ECC82) tubes Switchable unity gain or 3x gain Reduced hum/background noise circuitry Low flux leakage R-core transformer FET ripple filter for B-power Tubes powered by the DC power supply Other features DIY friendly PCB with room for larger coupling capacitors 100/115/220/230V input voltage selectable during assembly
12AU7 vs 12BH7 vs 6CG7 - diyAudio
https://www.diyaudio.com/community/threads/12au7-vs-12bh7-vs-6cg7.9862/
12BH7 will sound a little weak in the mids, with solid bass and clear treble in grounded cathode. However, make it the top tube in any totem pole and you have a clear winner. 12AU7 has a sound people love or hate. It has a sweet spot in grounded cathode where it has great HiFi qualities, but you have to burn it hot.
DIY and Hi-Fi Audio Schematics - DIY AUDIO PROJECTS
https://diyaudioprojects.com/Schematics/
DIY Audio Schematics Tube Linestage Preamplifiers. 4S Universal Preamplifier for 12A*7 Tubes - (Project) NEW ; 12AU7 / ECC82 / ECC802S Tube SRPP Preamp Schematic - (Project) 12AX7 Tube Hi-Fi Preamplifier Schematic - (Project) 12AU7 / ECC82 Cathode Follower Tube Preamplifier Schematic; 5687 (LED bias) Tube Hi-Fi Preamplifier Schematic - (Project)
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