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Grid leak biassing
The small amount of grid current in the tube generates a negative bias voltage across this resistor, which biases the tube to the proper operating point with respect to the cathode, which is grounded. This method of biassing is not very stable, and fell out of favour early on in the development of tube amplifiers. Most preamp stages now use cathode biassing as opposed to grid leak biasing.
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- Part of Speech: noun
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- Industry/Domain: Consumer electronics
- Category: Amplifier
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