Articles

Q-tron Audio bias calibrator technical background
Aug 22, 2021 · 50 minute read
Technical background about adjustment of bias, (operating point)
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The story about the reliable low distortion OTL amplifier
Aug 3, 2020 · 15 minute read
How we designed our OTL amplifiers
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High Performance Volume Control
Aug 2, 2020 · 25 minute read
Volume control with better performance than any potentiometer
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About

Q-tron was founded already 1976 by my brother Ulf and myself Hans Beijner to develop and produce advanced electronics. Throughout the years we have developed and produced special designs for the Swedish Military and Industry. Both of us have a background at Ericsson where my brother worked with sales and support and myself with electronic circuit design and product management.

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