PRIMALUNA: Beware of Fake AutoBias

What you are about to read  is critically important. If you own, or are considering buying a tube amplifier, you need to know the facts about tube life. Your tubes can last many many years armed with this information. Think of biasing like adjusting the engine idle speed on your car. It’s very much the same. Most cars idle […]

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CONVERSATIONS WITH COLIN: Transformer noise through speakers … when switched off!

Dear Colin, step up transformer noise. I purchased an amp from Europe that needs 240v [ I am on north American voltage].. I bought a step up/step down transformer to equalize the voltage. it works, but the transformer produces noise through the speakers, even when the amp is turned off. the transformer I bought was […]

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KOETSU: Can a retipped Rosewood really be worth £1000?

The thread starts: Picked up a used koetsu rosewood signature last week for £600. It was advertised as in excellent condition and had been given a clean bill of health from a dealer. The cart arrived and the bodywork and cantilever are in excellent condition but the diamond is very worn, and it sounds poor. […]

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CHORD COMPANY: News

Chord Company’s HDMI cables use the same high-quality materials and unique construction techniques that the Wiltshire company has become famous for, offering music, movie, TV and gaming fans the proven advantages of Chord Company-built cables. Every Chord Company HDMI cable is handmade to order at the Amesbury (Wiltshire) factory, located just outside the world-famous Stonehenge. […]

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ZONAL LIMITED: What happened?

V J Singh writes … A long running British manufacturer of blank tape, it’s usually classified as a Scottish concern but the only address found was actually in Redhill in the south of England. Produced tape from the 50’s into 1999 when they announced their intention to leave the media business. It is unclear if […]

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SOLEDGE: Howard Popeck speaks at length to people with interesting things to say: Mr. Raphaël Bini, the driving force behind French audio maker Soledge High End Wireless Audio System.

Hello Raphaël. How did your interest in music reproduction start? Well, I suppose everything starts with music listening during as a youth, with a father playing music, either on a piano or guitar, or on his HiFi system. Then, my father being an electrician and repairing TV sets, meant that I grew up with electronic […]

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IMPEDANCE: How to measure it?

Dear Colin, Zero autoformers; how to measure impedance please? I got a pair of Speltz zero autoformers recently but when I measure the total impedance, my multimeter sees only 0.4-0.6 ohm no matter what I do. It seems the multimeter could only read the DC resistance from the autoformer itself but not the total impedance […]

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