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We rebuild and calibrate the Triplett 3444, and offer a modification by adding a digital plate current meter so you can read up to 199.9 ma at the same time as you test for gm, no switching required. It will also measure the actual current for diodes and rectifiers which the 3444 can not do now.

We modify the 3444 to be able to use 121vac to 124vac, from the original 117vac.

It takes a full week to do this work, every part is measured, three days just to calibrate the line, 72 hours to burn-in the new parts. Triple calibrated. We can think of no tester or analyzer which requires a long burn-in and absolute fine tuning like the 3444. They leave here with less than 1% error from specification. Calibration is good for a minimum of 5,000 hours of actual in-service use, that is more than ten years for most.

We have the original factory floor master 18 page calibration with notes, and the calibration docs. on the web are not accurate.

Chris was a good friend.

regards
Bud Allen