All items tagged with tubes (121)

Western Electric 91E Integrated Stereo Amplifier Available for Pre-Order

January 10, 2022 by audioXpress Staff

Western Electric 91E Integrated Stereo Amplifier Available for Pre-Order

audioXpress readers have long been anticipating the announcement, and Western Electric finally confirmed that the company is taking orders for the new 91E integrated amplifier. Following the resumed production of the 300B triode tubes at the modern Rossville Works facility, Western Electric now launches a single-ended (SE) high-fidelity amplifier inspired by the 91A, its famous predecessor used in early Hollywood motion pictures. The new SE design offers over 20 watts per channel - a first for the 300B in a totally new design for the 21st Century.

Tube Amp Doctor Announces New EL34-STR REDBASE Premium Selected Tubes

October 11, 2021 by audioXpress Staff

Tube Amp Doctor Announces New EL34-STR REDBASE Premium Selected Tubes

Following on the introduction earlier in 2021 of the 6L6GCM-STR, the first model from an all-new high quality premium tube series named REDBASE from Tube Amp Doctor (TAD), the German company now announced the new TAD EL34-STR REDBASE, which can be used for any EL-34 application in guitar amplifiers and also hifi tube designs instead of 6CA7 and KT77 tubes. All tubes in TAD’s REDBASE family are manufactured on a new exclusive production facility.

Reducing Filamentary Triode Amp Distortion

September 1, 2021 by Larry Lisle

Reducing Filamentary Triode Amp Distortion

In this article, the author defends that it’s possible to dramatically reduce the intermodulation distortion in class A filamentary triode tubes by reducing the filament voltage. The theory being that the most important reason for the drop in distortion with the lowering of filament voltage is the reduction of the space charge. This article was originally published in audioXpress, May 2005.

D.W. Fearn Hazelrigg Industries Venture Opens Toronto Offices

July 27, 2021 by audioXpress Staff

D.W. Fearn Hazelrigg Industries Venture Opens Toronto Offices

Since 2017, D.W. Fearn, the manufacturer of professional vacuum tube audio recording equipment, handed over the production and marketing of its iconic line of gear with the distinctive red front panels to Hazelrigg Industries under an exclusive licensing agreement. Now, D.W. Fearn | Hazelrigg Industries, have announced the opening of their first Canadian offices, headed up by tech industry veteran Scott Taylor.

R&D Stories: The Original Western Electric 300B Vacuum Tube Now Shipping Worldwide

June 8, 2021 by Richard Honeycutt

R&D Stories: The Original Western Electric 300B Vacuum Tube Now Shipping Worldwide

Celebrating the reintroduction of the famous Western Electric 300B triode, now out of Rossville, GA, in this article, Richard Honeycutt asked key questions to entrepreneur Charles Whitener, the main force behind the revived Western Electric venture, which is also investing in new tube audio amplifiers and tube related electronics. Since a visit to the facilities wasn't yet possible but production had resumed, audioXpress provided an inside look at Western Electric and its reestablished operations. This article was originally published in audioXpress, May 2021.

audioXpress May 2021 Celebrates Its Glass Audio and Audio Electronics Roots

April 12, 2021 by audioXpress Staff

audioXpress May 2021 Celebrates Its Glass Audio and Audio Electronics Roots

Our May 2021 Glass Audio Special edition is certain to inform and inspire you. We reveal what is happening at Western Electric's new Rossville Works in Georgia, where production of 300B tubes is ongoing, we explain how to draw tube load lines, and we offer a valuable preamplifier design that enables you to compare the sound of tube and solid-state circuits from the same audio source. There's also a versatile stereo tube amplifier design to build, and plenty more audio electronics theory and practice in this edition. Now available online and in print.

You Can DIY! Vanderveen Trans-SE10 Secrets

February 10, 2021 by Menno van der Veen

You Can DIY! Vanderveen Trans-SE10 Secrets

In this article, Menno van der Veen explains everything about the Vanderveen Trans-SE10 amplifier, which is available as a DIY kit manufactured by Tentlabs. This letter-sized stereo amplifier is a single-ended design with an output power of 10W per channel, but there's a lot "under the hood" (and the glass) to understand. The article explains the “why and how” of the unusual Vanderveen Trans-SE10 design. This article was originally published in audioXpress, January 2021.

The Internal Life of Vacuum Tubes

September 16, 2020 by Jan Didden

The Internal Life of Vacuum Tubes

A few years ago, Jan Didden designed a high-voltage delay unit and shared its details in a 2019 audioXpress article. Many people built it and like it, but others said that it would be totally unnecessary. As so often happens in audio, arguments pro and con raged without a clear resolution. So Didden thought this was something he needed to get his head around. He found several sources, which he thought were credible, and this article is the result of his investigations, fed by those sources. This article was originally published in audioXpress, August 2020.

Ultrasone Unveils Volcano Headphone Tube Amplifier

September 7, 2020 by audioXpress Staff

Ultrasone Unveils Volcano Headphone Tube Amplifier

The Bavaria-based headphone manufacturer just introduced a new high end product to complement its existing high-end Edition Series headphones. Designed by Ultrasone and manufactured in Hungary, the new Volcano headphone amplifier continues the brand's tradition of aiming for reference products with superior sound quality, also perfectly matched to the Ultrasone Edition 15 reference headphones. Each Volcano is a carefully handcrafted unit, in a solid metal chassis and front panel with real wood side panels.

Book Review: Getting the Most Out of Vacuum Tubes

August 20, 2020 by Jan Didden

Book Review: Getting the Most Out of Vacuum Tubes

I ordered this book, Getting the Most Out of Vaccum Tubes, from KCK Media Corp. while I was researching tube service life issues. It is an unusual book, not discussing what you can do with tubes, how to use them in circuits, operating parameter calculations, or that sort of thing. Instead, it is solely devoted to factors that decrease useful service life or cause catastrophic failures.

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