Nobsound Vacuum Tube Amp Amplifier Plate Bias Current Probe r 8 Pin Socket for EL34, KT88, 6L6, 6V6, 5881, 6550, KT66, KT100, KT120, 7027 (CT1-C, Cathode Current)

Q: If this lets you check the cathode current via pin 8, why does it say it is a "Plate bias current probe"?

Because the cathode current is controlled by the plate bias. You adjust the plate bias variable resistor to get the correct cathode current.

Q: Does this have a 1 ohm resistor installed?

There's not a resistor- leads are in line with cathode. Bias current is measured directly with this device using an amp meter.

Product ID: 406734474

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Nobsound Vacuum Tube Amp Amplifier Plate Bias Current Probe r 8 Pin Socket for EL34, KT88, 6L6, 6V6, 5881, 6550, KT66, KT100, KT120, 7027 (CT1-C, Cathode Current)

Have a Question? See What Others Asked

Is this tester measuring the cathode current (ik) through the tube, so the sum of plate current (ip)+ screen current (is)?

If this lets you check the cathode current via pin 8, why does it say it is a "Plate bias current probe"?

Does this have a 1 ohm resistor installed?

Will this work for 7591 power tubes?

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