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You are looking at a BRAND NEW SRS BiasTool PVT hands-free plate voltage tester.

Allows safe, hands-free measurement of dangerous plate voltage in tube amplifiers- a critical measurement for determining the correct maximum safe bias setting in any tube amp.

One of these devices, along with your Bias Tool, will make your amp biasing job much easier and safer.

This device is the version used with the larger 8-pin octal based output tubes such as: 5881, 6550, 7027, 7581, 8417, 6V6, 6L6, 6CA7, EL34, KT66, KT77, KT88, KT90, and many more.

This device is *not* compatible with the smaller 9-pin mini tubes such as EL84, 6BQ5 and 7189- see our other listings for devices compatible with those tubes and amplifiers.

If you are unsure if this device is compatible with your amplifier or tubes, please contact us prior to purchase, and we will help you select the correct devices for your needs, no problem.