gray tube replication circuit

Power supply with Borbely style 12AU7/MOSFET hybrid

A tube/MOSFET hybrid power amplifier is being constructed based on a circuit published in AudioXpress by Cozza (May 2001), which is derived from a design by Borbely. The tube/MOSFET hybrid power amplifier integrates the warm, rich sound characteristics of vacuum tubes...

diy tube buffered passive preamp

By sufficiently lowering the output impedance of a circuit and supplying enough current to drive cables, it avoids the issues faced by passive designs. This approach seems to address many of the inherent problems in both active and passive preamps...

Tube-type crystal oscillator

The pilot lamp limits current to prevent damage to the crystal. A very useful circuit. The circuit incorporates a pilot lamp designed to limit the current flowing to a crystal component, thereby safeguarding it from potential damage due to excessive current....

circuit for 12AU7 tube distortion

A distortion circuit is being developed utilizing a single 12AU7 tube configured as a diode. The design is acknowledged as basic, intended primarily for the purpose of adding distortion effects. The proposed circuit leverages the 12AU7 vacuum tube, which is a...

Tube Parametric EQ

A simple 3-band parametric equalizer (EQ) is desired for integration into a tube bass preamp. The initial concept of using an operational amplifier (OpAmp) based EQ has been deemed unsuitable. The design of a 3-band parametric equalizer for a tube bass...

Homemade Metal Detector Kit

A simple home project can quickly become problematic if it encounters electric cables, gas, or water pipes, or the central heating system. Using a metal detector allows one to check for metal objects within walls, ceilings, or floors beforehand. An...

Glue stck torch

This project, developed around 2005, involves constructing a torch using a glue stick, which conveniently accommodates an AA battery within its plastic casing. To create a functional battery holder, contacts for both the positive and negative connections are necessary. The...

turret diy

For maximum mini-security, this RC Tupperware Turret delivers a formidable deterrent against food theft. While it lacks motion sensors, potential food thieves will think twice before attempting to swipe baked goods. This 11-hour project, designed by Chris of PyroElectro, emphasizes...

Electronics Projects Circuits

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