AmplitrexAT - 1000usedAmplitrex AT - 1000    Recent Upgrade & Calibration at AmplitrexI have an Amplitrex AT-1000 Tube Tester for sale. It was sent to Chris Terraneau for cleaning, upgrade and calibration in August. I have completed the testing of the last of my tubes in my colle...2750.00

Amplitrex AT - 1000 Recent Upgrade & Calibration at Amplitrex [Expired]

no longer for sale

I have an Amplitrex AT-1000 Tube Tester for sale.  It was sent  to Chris Terraneau for cleaning, upgrade and calibration in August.  I have completed the testing of the last of my tubes in my collection for sale and now am ready to sell it on.  Includes AT-1000 Tube Tester, Manual, Software, Tube Adapters, Power Cord, wireless Mouse and HP ProBook Laptop w/ Win 7 & Tube Test Program.

Payment via USPS money order, bank cashiers check, bank to bank transfer or PayPal (add $80.05) + shipping ( 18 x 17 x 13 / 29 lb. / from 98682).   Ships in the box and materials as shipped from Amplitrex.


Amplitrex AT1000 Tube Tester - Recent Cleaning, Upgrade and Calibration From Amplitrex  - Like New Factory Condition
I paid over $3000.  These are hard to get. It is the simplest to utilize yet most capable tester on the market.

 The Amplitrex AT-1000 is the state of the art computerized tube tester and one of the only tube testers ever produced that is able to work independently and has custom interfaced software for PC operation. 

 The Amplitrex AT-1000 is a current production tube tester and unlike tube testers built 35 to 55 years ago, the Amplitrex offers laboratory grade testing under microprocessor control and makes it possible to check a tube according to the original manufacturers design specifications.   

Even more valuable is the ability to duplicate real world amplifier parameters. With the Amplitrex AT-1000, you will be able to test tubes under the same conditions they are subject to within any amplifier.


•          Your tubes are sure to be dependable
•          Audio tubes are certain to sound good
•          Tubes graded on the Amplitrex are known good and are going to last longer
•          O.S Pre amp and Power tubes are worth what you paid for them
•          An audio noise test is performed and only low noise tubes are passed
•          The Amplitrex assures your tubes are not contaminated internally
•          Peace of mind that your tubes are certain to work without question
•          You can get your tubes exactly matched so you can keep spares that do not need to be re biased by a technician
•          Your tubes are going to make plenty of clean power
•          Your tubes will not make extraneous sound

The AT-1000 is a computer operated, self contained tube tester. The tester is fully solid state and has laboratory measurement accuracy of 1.5% on mutual conductance (Gm) tests.

The tester will operate in the stand alone mode or when connected to a micro computer. When operated by an external computer it provides a greater level of testing with operator control over many different tests. This tester was designed primarily for the audio industry.

Input Power:
105-120 VAC or 208-240V (specify when ordering) 50/60 Hz at 2 amperes maximum

Heater Supply:
1.0 to 12.6 VDC, regulated, at up to 3.5 amperes

Plate Supply:
90 to 500 VDC, regulated, at up to 160 mA (45 - 425V on special order)

Screen Supply:
90 to 500 VDC, regulated, at up to 160 mA (45 - 425V on special order)

Control Grid Supply:
-0.5 to -150 VDC, regulated

Heater-to-Cathode Leakage:
200 VDC, negative on heater relative to cathode, limited to 1 mA, maximum sensitivity is 1.0 uA

Small Signal Diode Test:
200 VDC, 1 uA to 1 mA fwd/reverse

Rectifier Tube Test:
550 VCT RMS (nominal) applied to tube plates. Load is approx. 120 mA peak, measures forward and reverse peak voltage drops for both sections.

Mutual Conductance Test:
0.05 mA/V to 50 mA/V (50 to 50,000 uMhos) with 1 kHz applied to control grid at 0.1 or 1.0V RMS

Shorts Test:
Tube is continually evaluated for shorts during the test sequence

Gas Test:
Detects effects of ionic gas current on grid circuit impedance

Tube Sockets:
4-pin, 5-pin and 6-pin ‘small base’, octal, and 7 and 9-pin miniature high quality NOS Micalex and ceramic sockets are provided. No Compactron sockets are present, but some Compactrons can be tested with an (optional) adapter.

Tube Life Test:
Using Reduced Heater Voltage (user-programmable)

User Interface:
5 menu navigation keys, UP, DOWN, LEFT, RIGHT and ENTER along with a 4-line x 40-character backlit LCD display

Specified for operation at 0 to + 40 degrees C, fan cooled, thermostat protected

Included Accessories:
Power cord, a set of plate/grid cap connectors, user manual and data and upload files on CD ROM

Dimensions and Weight:
14.75" W x 12.25" D x 6.75" H 18.5 lbs

Designed to comply with UL/CSA standards. EMC tested for compliance under FCC and EC requirements

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