BORBELY AUDIO’s primary objective is to develop and sell high quality kits for DIY audio amateurs. We started 25 years ago by offering hard-to-find components to Mr. Borbely’s amplifier designs, which were published in the AUDIO AMATEUR in the USA and the HIGH FIDELITY in Denmark. Today we are offering high quality kits and audiophile components to the audio amateur community and to OEM customers.
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 |  | | Mr. Borbely at his workbench, testing a custom-made ALL-FET lineamp. |
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Mr. Borbely received an MSc Degree in Electronic Engineering from the Norwegian Institute of Technology, University of Trondheim. He worked seven years as a design engineer at the Norwegian Broadcasting Corp., developing studio equipment, both in tube and in semiconductor technology. In 1969 he moved to the US and worked for David Hafler at DYNACO. Mr. Borbely was named Director of Engineering for DYNACO in 1972. He developed the Cascode output stage for the Stereo 400 power amplifier, and the DYNATUNE circuit for the FM5 FM tuner, for which he received a US patent.
In the 70s he worked at Motorola Semiconductor, developing power amplifiers, low-noise preamplifiers and FM-tuners. Some of this work was put to good use, when he joined The David Hafler Company as Director of Engineering. Mr. Borbely developed the DH101 preamplifier and the DH200 power amplifier, which was the first one to use MOSFETs in the US.
From 1980 until 1997 he worked for National Semiconductor in Germany as its Technical Training Manager. In 1984 Mr. Borbely and his wife Irene started BORBELY AUDIO, which is selling high quality Kits to end-users. Since 1982 he has been publishing his designs in the Audio Amateur Publications (Audio Amateur/Audio Electronics, Speaker Builder, Glass Audio and now in AudioXpress). In the last several years Mr. Borbely has developed a line of ALL-FET audio amplifiers. Besides the kit business, Mr. Borbely is designing audio products for OEM customers.
A selection of Erno Borbely’s articles from the Audio Amateur Publications:
60W MOSFET Power Amplifier, Audio Amateur, 2/82
Third Generation MOSFETs: The Servo 100 (Part I), Audio Amateur, 1/84
Third Generation MOSFETs: The DC 100 (Part II), Audio Amateur, 2/84
The Borbely Preamp, Part I, Audio Amateur, 4/85
The Borbely Preamp, Part II, Audio Amateur, 1/86
A Moving Coil Preamp, Part I, Audio Amateur, 4/86
A Moving Coil Preamp, Part II, Audio Amateur, 1/87
A Simple Curve Tracer, Part I, Audio Amateur, 4/90
A Simple Curve Tracer, Part II, Audio Amateur, 1/91
Balanced Audio Amplifiers, Audio Amateur, 1/91
The New Borbely Preamp: The Modules, Audio Amateur, 2/91
The Gaertner-Borbely Line-Level Preamp, Part I, Audio Amateur, 1/93
The Gaertner-Borbely Line-Level Preamp, Part II, Audio Amateur, 2/93
New Power Amp Modules, Part I, Audio Amateur, 3/93
New Power Amp Modules, Part II, Audio Amateur, 4/93
Modular Active Crossovers, Speaker Builder, 1/94
A 15W SE Power Amp With 6C33C-B, Glass Audio, 5/96
A Differential Line Amp with Tubes, Glass Audio, 1/97
An MC/MM Preamplifier with Tubes, Glass Audio, 2/97
Class-A Power Modules, Audio Electronics, 4/97
Low-Voltage Tube/MOSFET Line Amplifier, Glass Audio, 1/98
JFETS: The New Frontier, Part 1, Audio Electronics, 5/99
JFETS: The New Frontier, Part 2, Audio Electronics, 6/99
The ALL-FET Line Amp, AudioXpress, 5/02
Starter Kits Part 1: EB-604/410 All-JFET Line Amp, AudioXpress, 3/05
A Hybrid TUBE/MOSFET Headphone Amplifier, AudioXpress, 4/05
For back-issues of Audio Amateur/Audio Electronics, Glass Audio, Speaker Builder, or subscription to the new AudioXpress please contact:
Audio Amateur Corporation
P.O. Box 876
Peterborough, NH 03458
USA
Tel: (603) 924-9464
Fax: (603) 924-9467
Email: custserv@audioXpress.com
www.audioxpress.com
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 | | | The Webmaster's cat loves Mr. Borbely's Phono Preamp |
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 | | | Another Borbely cat that loves Audio Amplifiers |
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