Bias checkers can easily measure the current flowing through the tubes in an amplifier, making the bias adjustment process easier.
Tube amplifiers produce completely different sounds depending on the bias current setting. The bias point changes with use, so periodic adjustment with this unit will help maintain stable sound quality.
The bias current can be adjusted for both AC and DC ignition amplifiers as long as the heater is a paraeothermal type vacuum tube.
The amplifier that can be used must have heater voltage (AC or DC 6.3V) between pins 2 and 7. Two socket adapters are included, allowing bias current adjustment of two amplifiers at almost the same time. However, if you wish to use a single one, please use the A connector.
Compatible with most tube amplifiers using 8-pin GT tube sockets.
Power (both AC and DC) is supplied from the amplifier's heater, so batteries are not required.
Easily selects matched pair tubes.
Digital meter for accurate bias current measurement
Low contact resistance due to gold-plated sockets
The printed formula on the main unit makes it easy to determine the proper bias current.
Compact size for easy carrying in a guitar case

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