• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

uTracer3+

The manual very very complete. Nothing to worry about. It will take you trough the whole process step by step with many checks along the way. Ronald is very very responsive if there's any help you need. For the money it's probably the best you can buy in terms of a tube tracer.
 
It's a top top top product.

Manual is clear and easy. The build is not that difficult.
Amazing functionalities.

It opened my eyes as to "see" inside the tube's data.

Here is mine.
 

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Yes very accurate, but when using an additional PS for the heater, like I did.

I cross checked my results with an Amplitrex, and Maxi-preamp / matchers.
As well with my trusted 100% rebuild Sencore MU150.

The quick test gives all the info you need at the bias point you desire.

Two things are missing IMO:
- noise test.
- continuous mode especially to burn/test power tube under load. The tester pulses and measures so the plates never get hot. You can't damage a tube under test unlike analog testers.