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The MaxiMatcher II Digital Tube Tester - the latest upgrade of the well known classic test station.

Shipping now for only $695.00 !


  • Accurately measure tubes for amplification quality
  • Instantly identify weak or damaged power tubes
  • Precision matching for plate current and transconductance
  • Selectable real-world plate voltages - either 325 or 400 VDC
  • One step, all-element test for inter-electrode short circuits
  • SmartFuse high speed automatically-resettable protection circuit
  • Rugged plastic carry case with handle
  • US 120VAC, Euro 240 VAC, Japan 100 VAC
The Matcher II is a compact precision measurement station for the test bench or sales counter. The station tests power tubes for short circuits, heater operation and the electrical characteristics of Plate Current (Ip) and Transconductance (Gm). Any of the standard octal-base power pentodes common in today's audio amplifiers including 6L6, EL34, 5881 and 6550 can be tested. With optional adaptors the MaxiMatcher will also test EL84 nine-pin miniature pentodes, Novar power pentodes, 2A3 and 300B power triodes, EL509 plate-cap pentodes and many others.

The MaxiMatcher II is used by the audiophile, service technician, or music store salesperson to quickly test a tube for operation and quality. Start by inserting a tube in the short-circuit test socket to quickly check all tube elements for shorts. Then move easily into accurate electronic measurement by following just three simple steps. The Matcher can be used to precision-select loose tubes into accurate sets for mounting in power amps, or as a point-of-sale aid in selling matched tube sets, or for QC of customer tubes at the sales counter.

The MaxiMatcher II tests up to four tubes at a time, and has a separate extra socket for short circuit testing. Easy directions for use are provided right on the inside lid and the layout is clear and intuitive, making the Matcher simple to use and easy to understand. Separate selector switches for Bias Voltage, Plate Voltage, Measurement Function, and Test Socket Select are provided, along with the proprietary SmartFuse high speed protection circuit. All test data appear on a large, bright 4-digit LED display. Digital measurements are made by a proprietary high resolution sampling A/D converter.

UPDATE 3/24/2017: The MaxiMatcher II is in stock.

AC mains voltage selection

MaxiMatcher Specifications
Directly Testable
Tube Types
6L6, 5881, EL34, 6V6, 6550, 6CA7, 7581, KT88, KT90, KT100
Optional Tube Types
EL84/6BQ5, EL509, 7027, 7591, 7868, 807, 2A3, 300B, 45
(adapter required) click here for adapters
Plate Voltages 325, 400 VDC
Bias Voltages -60, -48, -36, -24, -14 VDC
Filament Voltage 6.3 VAC
Filament Current 6 Amps maximum filament current
Measurement Functions Plate Current (Ip) Range: 0 to 120.0 mA DC ± 1.5 %
Transconductance (Gm) Range: 0 to 19.99 mA/V ± 1.5 %
Test Frequency 1 KHz
Short Circuit test Any inter-electrode shorts up to 1K Ohm, Indicated by LEDs
Protection "Smart Fuse" high-speed current limiter, plus
AGC 1 Amp mains fuse
AC input 120 VAC, 75 watts max. input power (100, 240VAC models available)
Dimensions 8.5" D x 12.5" W x 2.5" H
Weight 11 lbs
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• Stabilize tubes before matching for more accurate results
• Improve reliability by eliminating
early failures
• Visual indicator on each tube to sort out failed tubes
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• Instantly identify weak or damaged
power tubes
• Accurately measure a tubes
amplification quality
• Precision-match tubes for plate current and transconductance
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• Measure preamp tubes for Gain, Transconductance and Noise
• Test any common dual or single
preamp triode
• Audition tubes with dual-RCA Direct Audio Output
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• Adapt non-standard pinouts to
the testers
• Adaptors available for power tubes and for preamp tubes
• SocketSavers for preserving your investment
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