The Virtues of Power Tube Matching

Some amplifiers don't have enough range on the bias pots to handle the range of tubes so that selection must be made from a particular part of the curve to achieve bias. In the "good old days," I'm told, the spread of values was much less, allowing reasonable performance with random selection. Today, however, random selection is certainly not recommended.

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Tube Improvements: Emmission Labs

These tubes are full-wave rectifiers of a special kind, and electrically equivalent to the original Western Electric historical tubes. The series connection makes the middle of the filaments to be virtually grounded, when using a filament supply winding with a center tap.

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Meet Roger Modjeski

"When I select a product, I consider that I am buying the experience and knowledge of the designer who conducted or led the engineering on the product, along with the skills of the people who crafted it..."

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