4
Biasing your Carr Mercury V
The Mercury V is a partial cathode bias (self bias) amplifier and as such does not require a
bias adjustment when changing tubes. Please use matched pairs of output tubes for
maximum performance. The Mercury V can only use matched pairs of 6V6 power tubes.
Carr Amplifiers selects and tests the finest current production tubes specifically for each
amplifier model. Caution should be used when buying replacement tubes from any dealer
who does not have a return policy as all tubes can have problems (NOS tubes are
susceptible to microphonics and failure too).
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