Transistor audio amplifier
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DC Coupled Audio Amplifier
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Electronics Circuit Application: New Vacuum Tube Amplifier
The power supply has been simplified. Power transformers and rectifiers have been omitted and some parts have been omitted from the MOSFET voltage regulator cir...
Safety Measures in Constructing EMG Amplifiers
My project is about constructing two similar EMG circuits (differing in gain) to measure EMG from two forearm muscles called the Flexor Digitorum Superficialis ...
Audio Amplifiers 8
a year ago I designed a class-D amplifier based on the TAS5162, pcm1808 and TAS5086. During the year, was made a few hundred samples intended to be sold to radi...
Audio Amplifiers 7
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6088 Based Battery Powered Full Feature Preamp Part 3
The main amplifying stages are triode connected 6088 stages. As indicated from the previous part, there are two amplifying stages. This provides a non-inverted ...
Poddwatt: Class-A Stereo Push-Pull EL84 (6BQ5) Vacuum Tube Amplifier
This project is related to the other tube amplifier projects I have posted. It has more than a casual similarity to the first Push-Pull EL84 (6BQ5) Oddwatt proj...
DIY ECC802S (12AU7 / ECC82) Vacuum Tube SRPP Preamplifier
that used a SRPP (shunt-regulated PP) driver stage I started to do some research and modeling on a SRPP. The advantages of such a line stage are much the same a...
DIY 6T9 Tube (Valve) Single-Ended Amplifier Kit
The PCB for this amplifier can be purchased from Spare Time Gizmos for $16US. In a single afternoon you can have the whole board assembled and dropped into a ch...
DIY Single-Ended (SE) 6L6 / 5881 Tube Amplifier
This past summer I saw Transformers: Revenge of the Fallen and I was inspired to build an enclosure for a vacuum tube amplifier that incorporated the Decepticon...
Oatley K272 JAN 6418 Valve (Tube) Preamplifier / Headphone Amp Kit
Oatley Electronics in New South Wales Australia makes a few kits based around the Raytheon JAN 6418 sub-miniature valve (tube). I decided to try out the $27AU K...
OddWatt Audio 5751 SRPP / KT88 Push-Pull Monoblock Tube Amplifier Kits
One of the advantages of hosting a hobby website is that you meet people through email who have similar interests as you. Ever since we posted Bruce`s first Odd...
preamp circuit
Using a K-12 tube amp with a NAD C542 CD player, there is no need for a buffer or line level preamplifier. The K-12 is a very polite and sweet amp with all the ...
A Direct-Coupled Amplifier with Cathode Follower by Raymond H. Bates
A Direct-Coupled 6V6 Tube Amplifier with Cathode Follower by Raymond H. Bates from Radio & Television News magazine November 1949...
DIY Class-A 2SK1058 MOSFET Amplifier Project
A very simple DIY Class-A MOSFET Amplifier Project that uses only a one Hitachi 2SK1058 N-Channel MOSFET in a single-ended circuit...
DIY IRF610 MOSFET Class-A Headphone Amplifier Project
Not thrilled with how a computer soundcard drove my 32 ohm Grado SR80 headphones, I decided to build myself a desktop headphone amplifier for the office. In thi...
NP-100v12: 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 bu...
Mullard EL34 Push-Pull Tube Amp Schematic (Dynaco A420 Transformer)
Mullard EL34 push-pull vacuum tube amplifier scheamtic using Dynaco A420 audio output transformers...
Direct-coupled Single-Ended (SE) 6V6 / 6V6GT Tube Amplifier Schematic
Direct-coupled Single-Ended (SE) 6V6 and 6V6GT Tube Amplifier Schematic with ECC83 Driver Stage. From the book Build your own Audio Valve Amplifier by Rainer zu...