Proudly MADE IN THE USA- no chinese junk here- these are built to last!

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

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 smaller 9-pin octal based output tubes such as: EL84, 6BQ5, E84L, EL84M, EL84S, EL86, 7189, 7189A, and many more.

This device is *not* compatible with the larger 8-pin octal based tubes such as EL34, 6L6GC and KT88, etc- 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.