Archive issues for (PDFs) audioXpress has been serving up the best in DIY, electronics, and innovations in audio since ! With an increased focus on. Your one-stop shop to audioXpress and Circuit Cellar products. Keeping you up- to-date on trending developments in audio and embedded electronics. Title: Audioxpress Burson Opamp review, Author: Burson Audio, Name: Audioxpress Burson Opamp review, Length: 4 pages, Page: 1, Published.

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High-Frequency filament converter for DHT’s.

May 8, by Ari Polisois. This article was published in audioXpress, April So, you can use it however you audioxprezs, for aucioxpress or non-commercial use. There are other cases where I have asked vendors to sell PCB’s as a service to hobbyists. I do sell things, including projects I no longer need, PC boards for my designs, and occasionally parts and tubes. I do this through eBay – I maintain an eBay store “pmillett”. The “Millett Hybrid” effort and others at HeadFi are examples and excellent models of how the DIY community should work, in my opinion.

Audiodpress 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. I’m currently living near Fort Collins, Colorado, and work for a Silicon Valley semiconductor company.

Muting relay PCB to eliminate the “thumps”. I also have written articles for AudioXpress magazine formerly Glass Audio on occasion. A high-end Tube Microphone Preamp.

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.

The “Engineer’s Amplifier”an affordable, aufioxpress push-pull TV pentode amp.

Pete Millett’s DIY Audio pages

When it came to selecting topologies for the balanced inputs and outputs, I ruled out transformers due to high cost, physical bulk, and weight. This article was published in audioXpress, July The Audio Voice Newsletter.


I try and help, but it sometimes takes me days – even weeks if I’m traveling for work – to respond. I recommend that if you don’t already have it you download the latest version of Adobe reader.

I’ve put some info from the old Wheatfield Audio web site here that might be useful, especially if you own an HA-1 or HA That said, I would appreciate it if you at least let me know if you are going to use any of the circuits or especially PCB Gerber files to make commercial products, or to sell bare PCB’s. This article was originally published in audioXpress, June There’s no guarantee that if you try and build anything like this stuff that you won’t electrocute yourself, the kids, or your cat, or burn your house down March 21, by Ron Tipton.

An isolated current sensor board to measure plate current using a PanelPilot meter. The DIY “Butte” solid-state headphone amp. A two-channel shunt-regulated adjustable bias supply. High-Gm driver pentode test data. ResCalca cool utility program you can download that calculates combinations of standard resistors to get a particular value.

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. EL push-pull single-stage “spud” amp experiment.

This article was originally published in audioXpress, October We think that’s more to it. This is a depository for various audio designs and projects – mostly tube – that I’ve put in the public domain, as well as additional info to support magazine articles that I’ve written, and an ever-growing amount of technical data archives relating to vintage and tube audio.

I do some commercial audio design work outside of my “day job”.

T-reg: A High-Voltage Regulator for Tube Amps

This article was originally published in audioxpress, March Most pictures are hyper-linked to full-size pictures, audioxprsss you can audioxpres in if you click on them.


Please, if you send me e-mail, make sure that there is a logical “subject”, or your mail will get dumped along with all the junk mail spam that I get – it’s up to about junk e-mails per day now.

In ALL of these cases, I make no profit from any of the sales. 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.

A PL single-ended amplifier. Some files have compressed images that may not work correctly with older versions of Acrobat reader. This article was originally published in audioXpress, December I owned and operated Wheatfield Audio, which made tube headphone amps but no money! Audipxpress items in category Project Articles.

Where to get stuff – an assorted list of some of my suppliers. In this article, Ron Tipton explores the use of stroboscope discs to determine whether your turntable is set to the correct rotational speed. March 27, by Joel Hatch. 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.

A compactron triple-triode driver for push-pull amps. I completed the design and construction of an archival phono preamplifier, which provides variable equalization along with several other operational necessities for playing vintage records rpm discs, pre-RIAA LPs, lacquer transcription discs, and so on. There are some cases where products are being sold not only with my permission, but active involvement. April 28, by Ari Polisois. The “” Push-Pull amp using driver boards below.