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

Excelente producto.

Worked as described. Was able to read my plate current easily on my tube amp. Great tool for checking the bias of your tube amp. The leads could be slightly longer but, still a good product.

Worked very well, easy to use. Decent quality.

Good build quality and a very attractive price. Note that leads are quite short. Not a problem for me. If it is a problem, just extend the lead.

For the price I was not expecting much but this is actually a great little device and is not as expensive as other bigger names. I used it to bias a Deluxe Reverb Reissue, 6V6 and worked great! So much easier and safer than probing tube sockets in the chassis. The leads are not very long though, so keep that in mind. Plus, if you’ve not done this before, the leads are dangerous if in the tube socket with the amp on and out of standby. Make sure those leads are inserted in the multimeter prior to energizing the amp. Also make sure to let the tubes get good and hot, settled in before final bias. I actually like to get new tubes that have had a 24 hour burn in time to help.