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Questions about tubes and gear that glows. FAQ

RE: Buy tubes from the right vendor that meets your needs because they do sound different.

The product has changed, process is the same. Today semiconductors are produced and marketed the same way. One design is made with the same process, then tested at the die level and binned according to parametric test results. They are wire bonded and packaged with different part numbers, the devices with the better specifications command a higher price.

Some customers take this a step farther, with in-house testing for either more stringent or different electrical characteristics. Only the devices that pass these tests are used in their products, the rest are resold.


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