audioXpress February 5. With a simple connection, you can convert a full- wave bridge rectifier I-C (such as the Radio. Shack ). Archive issues for (PDFs) audioXpress has been serving up the best in DIY, electronics, and innovations in audio since ! With an increased focus on. audioXpress Issue May Click To Enlarge. Item #: AX-FI; Manufacturer: audioXpress. VOLUME NUMBER 4. May Tang Band Full -Range.

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In this article, Joel Hatch explains how to build a variable frequency synchronous motor controller to audioxrpess turntable speed. This article was originally published in audioXpress, September This article was originally published in audioXpress, February December 12, by Gary Galo. This article was originally published in audioXpress, April In this project article for audioXpress, George Ntanavaras describes the design and construction of a high-quality RIAA preamplifier for moving coil cartridges based audiopxress high-quality Analog Device AD op-amps designed for low-noise audio applications and driven from very low source impedance.

The output of this audioxpdess is back-fed into the secondary of an audio output transformer, generating high voltage AC V at 40 kHz. July 25, by Pete Millett. Now that turntables audioxpres back in force, this excellent project not only allows some knowledge about a vital part of the motor’s rotational speed adjustment, but it also dives into one of the most crucial aspects of a record player for anyone interested xudioxpress a little DIY or restoration projects.

Following the publication of its original SE 6C33C amplifier in audioXpress JulyAri Polisois returned with more information on how to further simplify the whole construction and reduce the costs.

The Mighty Mouse is indeed a good sounding and inexpensive project audioxprss is also a good introduction to tube amplification. The Audio Voice Newsletter. The project started with a clean sheet, looking to address potentiometer design with a quality that rivaled existing designs while maintaining a reasonable cost. This article was originally published in audioXpress, October There’s no better way to pay tribute to Ron than revisit some of these projects. All items in category Project Articles.


December 13, by Gregory L. This article was originally published in audioxpress, March This article was published in audioXpress, March May 8, by Ari Polisois. April 19, by Aidioxpress Loewenstein. Stamler A Power Supply Spreadsheet This article describes a spreadsheet program for designing low-voltage power supplies using common IC three-terminal regulators.

A PP 25L6 Amplifier In this classical tube amplifier project, author Bob McIntyre offers what is effectively the foundation for many designs that we can find currently in the market.

Getting the Most from THAT’s Balanced Line Drivers and Receivers

I developed the PSU, which, together with the sophisticated shunt, sets a new standard for audio voltage regulators. This is not surprising.

The entire system runs on 8 AA batteries and should operate for approximately 4 hours continuously. Each file has two main pages: This article was originally published in audioXpress, March April 28, by Ari Polisois.

Aurioxpress this article, Ron Tipton explores the use of stroboscope discs to determine whether your turntable is auidoxpress to the correct rotational 2100. A pot with 64 levels and precision metal film resistors that is hard to beat for sound or facility, as he describes it.

This signal is rectified, filtered, and regulated in a conventional sense. This article was originally published in audioXpress, June The high voltage supply works by creating a square wave with a timer. February 7, by Paul J. October 31, by George Ntanavaras.

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. Charvat, two audioxprexs are used with a battery powered high voltage supply. This article was published in audioXpress, April This article from respected author Ari Polisois deals with a single-ended amplifier with enough power to drive even the most difficult speaker systems – delivering 50W per channel.


October 17, by Ron Tipton. I completed the design and construction of an archival phono preamplifier, which provides variable audoxpress along with several other operational necessities for playing vintage records rpm discs, pre-RIAA LPs, lacquer transcription discs, and so on.

This article was originally published in audioXpress, December When it came to selecting topologies for the balanced inputs and outputs, I ruled out transformers due to high cost, physical bulk, and weight. We think that’s more to it.

The author describes a microphone amplifier designed to interface a standard dynamic microphone to a soundcard or other computer microphone input with a 5V through 2. Apart from looking at some commercially available stroboscope discs, Ron Tipton explains how to print one from files that are freely available on the Internet, and explains how to build your own multiple-LED lamp to check the rotations. This is a project that quickly became the focus in lots of tube-oriented forums and has inspired long threads and many iterations, including further articles published in audioXpress from the author himself.

Sadly, the audioXpress community lost one of its most esteemed and prolific writers. This article was published in audioXpress, July The square wave is fed into a small audio power op-amp.

AudioXpress interview

The results, as the author describes, “combine the advantage s of the push-pull mainly power to the wonderful character of the SE: March 27, by Joel Hatch. This article by Ron Tipton details the design and construction of audiixpress TDL Model high-performance microphone preamp, using a differential input stage that used compound transistor pairs with circuit resistance values, computer optimized for very low output noise.

The spreadsheets are in audioxrpess Excel format, and should work in just about any spreadsheet program. March 21, by Ron Tipton.