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Otto-1 Multi-Tube Tester Matching System for Guitar Amplifiers 6L6GC 6550 EL34, US $484.00 – Picture 0
Otto-1 Multi-Tube Tester Matching System for Guitar Amplifiers 6L6GC 6550 EL34, US $484.00 – Picture 0

Otto-1 Multi-tube Tester Matching System For Guitar Amplifiers 6l6gc 6550 El34

US $484.00

  • Sparks, Nevada, United States
  • Jan 29th
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Available for sale is a very nice Otto-1 multi-tube tester system.  This tester will test your power output tubes, both 9-pin (EL84, 7189, etc) as well as octal (6L6GC, 6550, KT88, etc).  I do not know if it can test other tubes as well, as there appears to be limited information on this model.  This is a great way to test tubes that will be used in the same circuit.  It seems to have a variety of test functions.  I am assuming you connect an external meter to measure plate current. This unit was acquired from a gentleman who used to restore Fender guitar amplifiers, as well as many ham radio projects.  Due to health reasons, he can no longer enjoy his hobby, and as a result no longer had use for this piece of equipment.  It comes in the original wooden case, and has always been stored indoors in a smoke-free environment.  One of the transformer's paint is flaking a bit, and the handle on the case isn't in the best of shape.  Other than that, it looks great.  Take a look at the pictures below for details. Unfortunately, I do not have the manual, so I cannot test.  I'm sure one can be tracked down online with a little effort.  I am very confident that this unit is fully functional, as it was used just a few years ago. You will receive exactly what is shown in the photos below (no more, no less).  If you have questions about what is included, please ask. Thanks for looking, and let me know if you have any questions.

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