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DIY and Hi-Fi Audio Schematics
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
Audio preamp circuit diagrams / circuit schematics
http://www.satsleuth.com/Schematics.aspx?Category=Preamp
26 schematic for 27 tube preamp | diyAudio
https://www.diyaudio.com/community/threads/26-schematic-for-27-tube-preamp.332412/
But then I noticed Ale's design for a 26 tube preamp with an OT, which greatly reduces the gain. ... Sounds like you're on the right track for the audio circuit. I would make R1 larger than 47k, similar to the input on the transformer-coupled schematic (100k vol pot and 510k grid leak resistor).
4S Universal Preamplifier for 12A*7 Tubes - DIY AUDIO …
https://diyaudioprojects.com/Tubes/Universal-Tube-Preamplifier/
Matt describes the design and construction of the 4S Universal Tube Preamplifier. The 4S Universal preamp is a super simple single stage line level Hi-Fi preamplifier that will work with any of the 9-pin miniature 12A*7 twin …
Vacuum Tube Audio preamp kits - tubes4hifi
http://www.tubes4hifi.com/pre11.htm
all new PH-16 premium phono preamp KIT This is a premium grade phono preamp with several enhancements in the circuit design and power supply. This product is for someone that wants the ultimate tube phono preamp, but …
Audio Innovations Schemas - Dr.Tube
https://www.drtube.nl/audio-innovations/
Schematic of the 300 Mk2 power amp, (Dr.Tube). Schematic of the 300 Mk2 phono pre amp, (Audio Innovations). 500 2x 25W Integrated Amplifier. The Audio Innovations 500 integrated amplifier was designed by Erik Andersson and was introduced in 1987. It is a 2x 25W class A Push-Pull Ultra-Linear amp using two EL34’s per channel in the power amp.
Classic Schematics - Gyraf Audio
https://gyraf.dk/schematics/schematics.html
Classic Schematics. Mic Preamps: Neumann_PV76 Mic Preamp. Neumann V476 Mic Preamp. Disa 91b21 Microphone preamp (!!) Tube-Tec MP1A Preamp. NTP 179-270 Mic pre and Compressor. Amek M-2500 Mic pre stage. Calrec UA8000 …
12AX7 Tube (valve) Preamplifier Kit - DIY AUDIO PROJECTS
https://diyaudioprojects.com/Tubes/12AX7_Preamp/
12AX7 Valve Preamp Kit. The preamp kit is based around a common 12AX7 dual triode. The line level (Hi-Fi) version of the kit has the gain set at 4 (6 dB). What makes this kit very inexpensive is that power comes a …
5 Simple Preamplifier Circuits Explained - Homemade ...
https://www.homemade-circuits.com/small-amplifier-circuit/
1) Preamplifier using two Transistors. A simple pre-amplifier circuit can be very easily built by assembling a couple of transistors and some …
Borbely RIAA Preamp With Tubes - A Project Remembered and ...
https://audioxpress.com/article/borbely-riaa-preamp-with-tubes-project-remembered-and-revisited
This approach to RIAA equalization results in a high-quality phono preamp featuring the high-transconductance 5842 tubes. The author adapts Erno Borbely's project of a transistorized phono preamp with a vacuum tube implementation. These articles were originally published in audioXpress, October 2003 and January 2010. For this repost, we …
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