Fresh From the Bench: The Linear Audio Autoranger Mk II Measurement Interface

Stuart Yaniger explores new possibilities in audio measurement systems, expanding on the basics of using sound cards combined with new accessible-to-all software tools, such as REW, and a recently improved measurement interface option. That option is the Linear Audio Autoranger Mk II Interface, which audioXpress’ Technical Editor Jan Didden designed a few years ago and which is now available as an improved Mk II version. This article was originally published in audioxpress, April 2020.

Want to know which of the topics and stories published online in 2019 were the most popular? We looked at the most-read articles of 2019 in audioXpress.com (which also includes selected articles from Voice Coil magazine), and we created this Top 10 list of news stories and online articles. Here are the results!

This article provides an overview of the Korg Nutube 6P1, a new, miniature, low-power dual directly-heated triode device. It was developed by Korg (of musical instrument fame) and Noritake Itron, a manufacturer of vacuum fluorescent displays, in Japan. Although it is a true directly heated triode, it is manufactured differently than traditional vacuum tubes, which gives it some unique attributes. This article was originally published in audioXpress, May 2017.

2018 was another record-breaking year for audioXpress.com with visits and users doubling the figures compared to our record year in 2016. Want to know which of the topics and stories published online in 2018 were the most popular? We looked at the most-read articles of 2018 in audioXpress.com (which also includes selected articles from Voice Coil magazine), and we created this Top 10 list of news stories and online articles. Here are the results!

This simple single-ended amp project by Pete Millett is a great performer and a very well documented project that was immediately adopted by many DIY'er's. The amplifier achieves good power output and low distortion by employing “E-linear” feedback in the output stage. This article was published in audioXpress, April 2005.

Stuart Yaniger continues to examine ways to create a low-cost system for lab-grade audio electronics measurements. In this article, a few measurement examples are used to illustrate the power and the versatility of sound-card-based measurements. To illustrate the usefulness of measurements in the design process, Yaniger also explores the effects of load on power supply noise for a common IC regulator circuit. This article was originally published in audioXpress, November 2015.

In this article series, Stuart Yaniger examines ways to create a low-cost system for lab-grade audio electronics measurements. The pieces of a powerful modern measurement system comprise a sound card, software, and a signal conditioning interface and, of course, the right computer. In this fourth article in the series, the author looks at selecting the right interface. This article was originally published in audioXpress, September 2015.

audioXpress May 2017 is a very strong edition for all tube and audio electronics aficionados in general. This month we bring an exclusive R&D Story on the revival of the Dynaco brand and the development project of the new Dynaco ST-70 Series 3 stereo tube amplifier. Next up, we jump straight into the future of tubes, with an overview of the Korg Nutube 6P1. For hands-on experience, we feature great projects about Circlotron amplifiers, the Kismet 5 amplifier - 20th anniversary edition, and four gadgets for tube enthusiasts. In addition to the tube focus, you can read about the new ETAL Anaview ALA0080 Class-D module and the quality of streaming music with Sonos and Deezer.

Here’s a simple, safe, inexpensive project for beginners and those who wish to “try tubes.” Meanwhile the project has been tried, tested, approved and improved, become one of the classic DIY audio projects from the author. This article was originally published in audioXpress magazine, November 2002.

In this article, author Pete Millett explores the different types of power transformers, and why you might choose to use each type in audio equipment. The article addresses issues with low-frequency (50–60Hz) line transformers, but many of the same issues apply to audio-frequency transformers as well.