I have been off for some years, had to cope with health and family issues, and after I had Corona, it rather stayed than went away, so Post-Covid took me three years ago. It was just last October, ...

Frequency response: Less than +/- 0.5 dB deviation 20Hz-20kHz Phase response: Less than 5 degrees deviation 20Hz-20kHz, or less than 2 degrees deviation 20Hz-20kHz, depending which Consonance/Opera ...

This is a variation of a simple shunt regulator design that has been floating around on the net. It is a unity-gain (thanks to the feedback through C1) amplifier that consists of gain-element Q1 and ...

DIY projects for building audio and HiFi cables. Interconnects, digital, power and mains cables plus general theoric articles. All the projects are FREE and NOT FOR SALE.

The oft described (especially among women's magazines) male mid-life crisis is supposed to be a desperate menopausal attempt to reclaim the joys of lost youth, the sense of wild adolescent playfulness ...

In the first installment of this series we had a look at the noise generated at the output of a number of easy to build and cheap voltage regulators: single-chip series and shunt regs (LM317/337 and ...

25 years ago valve amps were a tiny backwater even in high-end hi-fi, an obsession followed by a few collectors (frequently in the Far East) and the odd tiny specialist manufacturer. Within this niche ...

The above schematic comprises almost anything you can put around the ubiquitous LM317 positive 3-pin regulator (LM337 for negative voltages, 117 and 137 military versions). The basic circuit dispenses ...

In the world of Hi-Fi there are few components that are the subject of so many different and often conflicting theories than those that surround the design of tonearms. Rigid or flexible, damped or ...

Retro is very much of the moment, it seems, and I kind of like it. A modern Mini or Fiat 500 will never have the appeal of the original, but it will have the convenience and safety of a modern car, ...

I auditioned a number of CD-Players, before buying my CD-67 SE. I felt that of all the CD-Players in question (which shall remain unnamed) it offered the most music for the money. Having lived with ...

The TL431 is a 3-terminal shunt regulator which some in the DIY community attribute near-magical properties to. And yet, in audio industry it is nearly never used. It is a component with reasonable ...