The result of 6 years of engineering development, the MaxiPreamp Digital Tube Tester is a precision measurement station for the test bench or sales counter. It's designed to test dual triodes and other signal tubes for the electrical characteristics of Gain(A), Transconductance (Gm) and noise (dBv). Any of the standard dual triodes common in today's audio amplifiers such as 12AX7, 12AU7 and 7025 can be tested. With optional adaptors the MaxiPreamp will also measure 6DJ8 and octal base dual triodes such as 6SL7 and 6SN7.

The MaxiPreamp is an entirely new approach to signal tube measurement and is the most comprehensive tester yet in its testing capabilities.The instrument uses two proprietary high-performance current sources, an independent circuit for each section of a tube under test, to create the most accurate results possible for todays demanding listeners. Test results are scanned by a precision analog to digital converter to keep crosstalk and destabilization to a minimum.

The MaxiPreamp mounts up to four tubes at a time, and can measure one tube while heating and stabilizing three others simultaneously. The instrument has separate controls for Measurement Function, Gain Type, Socket Select, Audio Output Level and Section Listen. The Function control selects the type of test, while the Gain type calibrates the MaxiPre for high, medium and low Mu types. The Output Level controls the audio level at the dual RCA jacks, and the Section Listen switch allows you to audition each amp in a dual triode individually. The Noise Test is calibrated in absolute dBV and is a broad spectrum True RMS measurement averaged over time.

The MaxiPreamp is used by the electronics tech, music store salesperson, or audiophile enthusiast to quickly test a tube for quality and function. Each of the four test sockets has two bi-color LEDs indicating operational status for the two amp sections in a dual triode - you get eight individual testers in one package! All tests are continuously sampled, averaged and then updated to get the most accurate measurement. Test results are displayed simultaneously for both sections in the backlit LCD panel and digitally updated 4 times a second.

Only $949

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