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DIY Engl E650 Blackmore amp bias adjustment. By Calgaz77

As I had to replace the tubes in my amp recently I thought I would give a hand to others doing the same thing. This tutorial shows two things. 1, Were the bias pot (adjustment) is in the E650 model. 2, The benefits of using Eurotubes Pro One Bias Probe. Please remember that tube amps can store charge in them for a long time after they have been unplugged. The charge can kill so if you don't know what your doing get an amp tech to do the job. I was zapped by a Marshall 30 years ago, so be careful. Just don't touch anything inside even when its been off and unplugged for days. I'm sure the guys at Eurotubes will set you in the right direction they have complete bias videos on YouTube. Just do plenty of research. By the way, the question near the end about the unknown (bias) pot is, a hum balance pot for the heaters of the tubes.