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Questions about tubes and gear that glows. FAQ

What makes a tube is its electrical properties

An 845 is an 845 unless it is broken or defective.

The meter measures the current through the tube. The brand of tube does not matter in setting bias, it is the tube type, 845.

You said "The amps have a Bias Voltage adjustment pot, but I've no idea what to set it to. I've mislaid the amp's instruction book too!" This information is on their site.



Edits: 03/07/15

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