All items tagged with audioXpress archive (47)

A Great First Amplifier Project

April 18, 2016 by Rick Spencer

A Great First Amplifier Project

Here is an excellent beginner’s project for those just getting started in this hobby. This “little” amp is easy to construct and has only about 25 parts in each channel. The system transformers are very inexpensive, and the total cost involved for a complete stereo version should be very minimal! This article was originally published in audioXpress, December 2001.

Choosing and Using Electronic Parts: A Survival Guide, Part 3

March 25, 2016 by Charles Hansen

Choosing and Using Electronic Parts: A Survival Guide, Part 3

Here’s the final section in our series on parts reliability, how to choose them and how to estimate their life expectancy. In the third part of this article, the author continues to examine electronic components, and discusses what we can do about reliability. This article series was published in audioXpress, from November 2001 to January 2002.

Choosing and Using Electronic Parts: A Survival Guide, Part 2

March 23, 2016 by Charles Hansen

Choosing and Using Electronic Parts: A Survival Guide, Part 2

Everything you need to know about how parts function, and how to select and maintain them. In the second part of this article, the author continues to examine electronic circuits with a look at some common circuit components, like resistors, semiconductors, diodes, small signal transistors, power Semiconductors, and microelectronics. This article series was published in audioXpress, from November 2001 to January 2002.

You Can DIY! The TERESA Amplifier

March 2, 2016 by Harald Frank

You Can DIY! The TERESA Amplifier

TERESA amplifier is a simple and cascadable Class-AB design. The name is an acronym for manufacturers TExas Instruments and REneSAs, who provided the parts for the core of this amplifier. The result is worth seeing and hearing! This DIY project does not require any special experience in detailed analog circuit technology to build. This article was originally published in audioXpress, November 2014.

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On Angel’s Wings, Part 2 - A Speaker Design for the Bohlender Graebener RD-75 Planar Magnetic Driver

February 23, 2016 by Thomas Perazella

On Angel’s Wings, Part 2 - A Speaker Design for the Bohlender Graebener RD-75 Planar Magnetic Driver

In January and February 2001, audioXPress included a project from Thomas Perazella, describing in detail the design and construction of a speaker using the Bohlender Graebener RD-75 planar magnetic driver. This is the second part of the project, detailing the final part of the speaker construction, measurements and listening trials.

On Angel’s Wings, Part 1 - A Speaker Design for the Bohlender Graebener RD-75 Planar Magnetic Driver

February 18, 2016 by Thomas Perazella

On Angel’s Wings, Part 1 - A Speaker Design for the Bohlender Graebener RD-75 Planar Magnetic Driver

In January 2001, the first audioXPress magazine issue (Vol. 32 No.1) included this project from Thomas Perazella. Published in two parts, the articles described in detail the design and construction of a speaker using the Bohlender Graebener RD-75 planar magnetic driver, including references to previous experiments with dipole baffles. This is the first part of the project.

The ImPasse Preamplifier

February 6, 2016 by Stuart Yaniger

The ImPasse Preamplifier

Stuart Yaniger wrote a great article for audioXpress in February 2009, The ImPasse Preamplifier, describing a tube preamp to drive a pair of Nelson Pass’ First Watt F4’s (or other low-to-unity-gain power amplifiers) in balanced mono. Yaniger’s preamp is truly an elegant design with very, very low distortion, using a 6SN7 to drive a 6922 in balanced mode. There are LED’s, NE2H neon lamps and depletion MOSFETs in the design.

EB-604/410 All-JFET Line Amp Starter Kit

January 5, 2016 by Erno Borbely

EB-604/410 All-JFET Line Amp Starter Kit

This article continues the classic JFETs series of articles by Erno Borbely and introduces one of his starter kits with an all-JFET line amp. Originally published in audioXpress March 2005 this is an essential reading to understand the “building blocks” of the “Borbely amplifiers”.

JFETs: The New Frontier, Part 2

December 29, 2015 by Erno Borbely

JFETs: The New Frontier, Part 2

The basic circuits on which Erno Borbely based most of his projects are described in “JFETs: The New Frontiers, Part I and II,” published in Audio Electronics AE 5/99 and 6/99, and “All-FET Line Amp,” published in audioXpress May 2002. As the author admits, these were the “building blocks” on which many - if not all - of his amplifiers are based. This articles continues his JFETs series and was originally published in Audio Electronics, Vol 5 1999.

JFETs: The New Frontier, Part 1

December 20, 2015 by Erno Borbely

JFETs: The New Frontier, Part 1

The basic circuits on which Erno Borbely based most of his projects are described in “JFETs: The New Frontiers, Part I and II,” published in Audio Electronics AE 5/99 and 6/99. Referring to these articles frequently, the author admits, these were the “building blocks” on which many - if not all - of his amplifiers are based. This article is the first part, as originally published in Audio Electronics, Vol. 5 1999.

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