Hollow-State Electronics: The Orange Valve Tester MKII
The Orange Valve Tester MKII is a new microprocessor-controlled testing system from the famous British guitar amplification manufacturer. Featuring greatly improved algorithms with an updated database containing the test results of literally hundreds of new, used, and faulty valves, this MKII tester requires no knowledge of valve theory. A user simply inserts a valve into the correct socket, selects the valve type from the list, and presses the ‘OK’ button. The status of the valve under test is quickly revealed.