My DIYAudio Forums

Current hifi projects

What's new?

Project name	Description	Status	Picture
QRP-01, Gainclone LM3886 power amp	Easy built power amp of 2 x 68 W, 2 x 120 W peak or mono bridged connected 1 x 200 W, or at least 120 W. One single pcb with power supply and optional DC-servo. Both the input buffer and LM3886 can be configured as inverting or non-inverting.	Printed circuit boards available.
QRP-02, Gainclone LM3886 power amp	Advanced power amp of 68 W, 120 W peak. One single pcb with power supply and optional DC-servo. Many parts surface mounted. This is the world's first Gainclone with surface mounted parts!	Printed circuit boards available.
RFB-01, rectifier bridge	Rectifier bridge based on MUR820 and RIFA PHE450 heavy duty polypropulene caps. Extreme performance.	Printed circuit boards not available.
RFB-02, rectifier bridge	High current rectifier bridge based on MUR3020 and RIFA PHE450 heavy duty polypropulene caps. Extreme performance.	Printed circuit boards available.
SST-01, soft start	This circuit reduces huge inrush currents caused by toroid transformers.	Printed circuit boards available.
DCT-01, DC trap	This circuit reduces mechanical hum from toroids caused by DC on the mains.	Printed circuit boards available.
MLD-01, Mains LED Driver	This little design is an example how LED's can be powered directly from 230 VAC mains.	Printed circuit boards not available.	No picture.
QSXM2, phono amp	Phono amplifier, completely discrete design. Extreme performance.	Printed circuit boards available.
QSXM3, phono amp	Phono amplifier based on high quality operational amplifiers. Ultra extreme performance if you choose the right parts. Easy to build.	Printed circuit boards available.
JSR-01, power supply	Super low noise general purpose stabilized power supply for all kinds of applications but audio is in mind particulary. This super regulator design is very flexible and easy to change for your particular needs. Extreme performance. Maybe the best regulator in the world?	Printed circuit boards available.
JSR-02, power supply	It's a smaller version of the JSR-01. Can be built in a negative version with the same pcb.	Printed circuit boards available.
JSR-03, power supply	A version of the JSR-01 with hole mounted parts.	Printed circuit boards available.
JSR-04, power supply	General purpose stabilized power supply for all kinds of applications. This designed is cloned with the famous Jung Topology and with my QSXPS. The design is very flexible and easy to change for your particular needs. Extreme performance.	Printed circuit boards available.
JSR-05, power supply	A negative version of the JSR-03 .	Printed circuit boards available.
JSR-06, power supply	General purpose stabilized power supply for all kinds of applications. Very well suited for high end pre amps, phono amps etc. The design is very flexible and easy to change for your particular needs. Extreme performance.	Printed circuit boards available.
QSXPS Rev.1, power supply	General purpose stabilized power supply for all kinds of applications. Very well suited for my phono amplifiers and my DAC. The design is very flexible and easy to change for your particular needs. Extreme performance.	Printed circuit boards available.
QSXPS Rev.0, power supply	General purpose stabilized power supply for all kinds of applications. Very well suited for my phono amplifiers and my DAC. The design is very flexible and easy to change for your particular needs. Extreme performance.	Printed circuit boards not available. Check the new revision above instead.
QRV-01, headphone amp	Headphone amplifier with MOSFETs as output transistors, completely discrete design. Extreme performance.	Printed circuit boards available.
QRV-02, headphone amp	Headphone amplifier based on high quality operational amplifiers. Ultra extreme performance if you choose the right parts. Option for the AD8610. Easy to build.	Printed circuit boards available.
QRV-03, headphone amp	Headphone amplifier based on high quality operational amplifiers and with the advanced current feedback technology. Ultra extreme performance with almost any parts. Easy to build.	Printed circuit boards available.
QRV-04, headphone amp	This SMD headphone amplifier uses multiple feedback as an option and works very good with AD8610 OPA134 or OPA627 and a buffer BUF634.	Printed circuit boards available.
QRV-05, diamond buffer	Cute little Diamond buffer or "Jung Super Buffer" for general use, as output buffer after opamps or just as a line stage. All parts are SMD, easy to solder if you are used to SMD.	Printed circuit boards available.
QRV-06, headphone amp	Cute little discrete current feedback headphone amplifier with a Diamond buffer or "Jung Super Buffer".	Printed circuit not boards not available anymore, discontinued. See the QRV-08 instead
QRV-07, headphone amp	The amp consists of AD8610 and the new and extreme TPA6120 from Texas Instruments. This headphone amp IC is something else. Check the distortion figures!!	Printed circuit boards available.
QRV-08, headphone amp	Discrete built current feedback, headphone amplifier (improved version of the QRV-06) with a Diamond buffer or "Jung Super Buffer" and a snubberized power supply with super regulator, complete with transformers for 230 VAC. All parts are SMD, easy to solder if you are used to SMD.	Printed circuit boards available.
DAC-DeltaSigma, digital-/analog converter	Advanced DAC project based on semiconductors from Crystal.	Printed circuit boards available but the CS4328 is obsolete. The project is waiting for redesign since the DAC, CS4328 is not available anymore. Chips in mind are CS43122, AK4395 or something else. This is a future project and is nothing to wait for, I'm afraid.

people have viewed this page since 2000-07-11.Per-Anders Sjöström 2007-08-15