2009年5月22日 · 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.

2009年4月20日 · For a turntable you need a dedicated pre-amplifier to provide both the required gain and the RIAA playback equalization. This would be used for just the turntable and would be plugged into the line stage you are currently building.

Discover a detailed 12au7 preamp schematic and learn how to build your own preamplifier for audio systems. Explore different circuit designs, component choices, and wiring diagrams for optimal sound quality.

One of the most commonly found driver tubes found in push-pull vacuum tube audio power amplifiers is the 12AU7 preamp tube. As well, this tube's low gain make it a great choice for tube preamps in hi-fi stereo systems. Other 12AU7 tube equivalent part numbers are ECC82, 5814, 6189, and CV4003...More Details

2014年9月10日 · The DIY version of the ForeWatt tube preamp. The preamplifier uses the 12AU7 family of tubes that also includes ECC802S and ECC82 valves. The preamp uses a SRPP circuit and the gain is either 7 or 11.

2019年5月17日 · The 12AU7 has relatively low grid current when used at low voltages as compared with similar tubes. It's commonly available, has reasonable heater-demands and the transconductance, which is important for CF applications, is at least average (if you want tube-sound you don't want the transconductance to be too high anyhow).

12AX7+12AU7 Classic China Amplifier "Marantz 7" style circuit? Recently a friend donated me some NOS 6189W tubes they are basically 12AU7 mil-type. I wanted a simple easy circuit to plug them into. I decided to buy one of these kit preamps from Aliexpress.

2024年8月5日 · A Simple Preamp with a Specific Goal. The idea for this preamp has been floating around in my head for almost ten years. Ever since I built and posted about the “Universal” Preamp there has been a lot of discussion about a buffered preamp for adding tube color to lower input impedance solid state amplifiers. This discussion arose because ...

12AU7 Stereo Buffer Preamp. No gain, high input impedance, low output impedance, minimalist preamp solution

2008年12月18日 · This schematic below is a simple two stage line-level preamplifier using a single 12AU7 (ECC82) tube per channel. The overall voltage gain of the circuit is about 8. The output stage of the circuit is a Cathode Follower and is …