Projects

Do-it-yourself audio circuits and design ideas.


Phono Stages : Digital : Line Level Circuits : Amplifiers : Headphone Circuits : Cables : Voltage Regulators and Power Supplies : Other


Phono Stages

The VSPS
Cheap, simple, versatile op-amp phono stage.
The CrystalFET
J113 Passive MM MC Phonostage.
The Phonoclone
A current input MC phonostage based on the 47 Labs Phonocube.
6DJ8 Passive MM Phonostage
Using two 6DJ8s.

Top


Digital Sources

A DAC of the Klones
16-bit zero oversampling clone of the 47 Labs Progression.

Top


Line Level

Sapphire 4
Discrete current feedback amplifier, can be used as a line stage or headphone amp.
The B-board
General purpose discrete diamond buffer.

Top


Amplifiers

The Gainclone
Reverse engineering the 47 Labs Gaincard.
Single-Ended 6V6 Tube Amp
How I got caught up in 'homebrew'.

Top


Headphone Circuits

Sapphire 4
Discrete current feedback amplifier.
Sapphire
Discrete diamond buffer and op amp input stage.
Twilight
Single-ended MOSFET design revisited as a hybrid mu-follower.
Szekeres VE
The single-ended MOSFET buffer, DC coupled.
J-Mo Mk. I
JFET-MOSFET buffer. As featured at Headwize.
J-Mo Mk. II
Single-ended MOSFET amplifier.

Top


Cables

Digital Interconnect
75 ohm cable for SPDIF or video signal.
Mogami and Endeavour Xi Interconnects
For line level audio.
Endeavour X0, X, X2, and X3 Speaker Cable
Cat5 twisted pair. From smallest to biggest.

Top


Power Supplies

The X-Reg Voltage Stabilizer
A high performance split supply voltage regulator for low voltage, low current circuits.
The S-Reg Voltage Regulator
A split supply shunt regulator for low voltage, low current circuits.
The Z-Reg Voltage Regulator
A simple split supply voltage regulator for low voltage, low current circuits.
The Cap Rack!
Simple device to break in Black Gate capacitors without having to listen to them.

Top


Other

Data Tables
Decibel conversion, resistor color codes, wire resistance chart.