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a jolt

Posted by Lew (A) on May 4, 2016 at 10:19:22

In Reply to: RE: Direct Drive posted by airheadair on May 3, 2016 at 18:24:26:

To work on my Beveridge DD amplifiers, I bought a special probe rated for 6kV. It looks like a short sword with an insulated "hilt", so that voltages at the sensor end cannot jump across to the handle end. On one occasion, the tips of my fingers were overhanging the hilt, just on top of its bulge, not really on the danger side. Nevertheless, while measuring (only) 1600V, I got zapped on my exposed fingertips, which later split open and required quite a while to heal. Needless to say, I was very careful thereafter about how I gripped that probe. Bill Thalmann showed me his scars from working on my unit, too; he got it much worse but also only in the fingers, fortunately. Across the chest and you're a goner for sure. The Bev amps use +/-1600V, or 3200V from + to - poles. The Sound Lab ESLs require much higher voltage, although I don't know, and SL won't say, exactly what that voltage is, probably at least 6kV.

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