Volume 5

Linear Audio, your tech audio resource, continues to offer you stimulating, interesting and thought-provoking articles as well as projects you can build. Volume 5 is our 6th issue. There’s the definite solution to the supply snubber problem, a tutorial on balanced and se audio connections, an archival phono preamp, variable freq. tone controls, how to get your audio off the ground, hi-freq. reverb, audibility of hires audio formats, a headphone amp, speaker improvement and stray capacitances in audio xformers. Vol 5 includes a free PCB for Bruno Putzeys’ preamp demo project. Don’t forget to visit the Letters and Articles area on this website for complementary papers and comments to articles. Happy reading, but don’t forget to listen to your music!

 
Rectifier ringing and snubbers Vol 5
Morgan Jones

Look inside almost any piece of commercial equipment having a linear power supply and you will find small capacitors across the rectifier diodes. Those capacitors are there to prevent the combination of mains transformer leakage inductance and diode capacitance from ringing when the diode switches off. But would ringing really occur, and if snubbers do work, how well do they work?

To answer these questions, Morgan Jones first investigates transformer leakage inductance, then focusses on semiconductor diode capacitance and finally comes up with a surprisingly simple and effective snubbing method .

 
Interconnections in Audio Vol 5
Erik Margan

Erik Margan has long realized that a cable is a potential source of trouble interconnecting two other potential sources of trouble. In this article, he explores various methods to exclude these sources of trouble, using single ended and balanced receivers, single ended to balanced converters, drivers and vice versa. Common-mode suppression sensitivity to component tolerances as well as fully differential amplifiers and filters are also explained.

 
Oliver Masciarotte – To Serve and Groove Vol 5
Stuart Yaniger

Stuart Yaniger reviewed Oliver Masciarotte’s latest writing. The book, which is available both in printed and in eBook form, is meant as a general guide to computer-based audio with an explicit set of “how-to” instructions to get your own computer-based system up, running, and optimized. Stuart finds both strong and weaker areas, but generally concludes that it is worth its price.

 
Listening to paradoxes Vol 5 
Stan Curtis

Most of us agree that the aim of good hi-fi is to re-create the sounds heard in the control room of the studio when the final mix of a piece of music is laid down onto tape or disk.  You just take a stack of the best high-end equipment and connect it up with the finest and eye-wateringly expensive cables and the end result will be a sound that will be within a flea’s whisker of the original. Surely the CD is a bit-to-bit exact copy of the original recording and the rest of the equipment, as the magazine reviewers never tire of telling us, is as close to perfection as makes no difference. As it happens, Stan Curtis spent some time in the studio recently re-mastering an old album for re-release and discovered again that the sound was head and shoulders above that from all other sources.

This is just one of the paradoxes Mr. Curtis set out to explore in his column, and again he provides us with much food for thought.

 
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