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HV Test Technology Inc. was founded in 2004 to provide technical support to users of Biddle/AVO/Megger High Voltage Test Equipment of any age. We specialize in repairs, upgrades, NIST traceable calibrations, in addition to solving sensitivity, interference, test fixture, transient voltage spike and grounding problems for Partial Discharge [Corona] & RIV Test Systems.Our large stock of hard-to-find parts for Biddle Partial Discharge [Corona] Detectors and Master Calibrators, built between 1976 and 2004, allows us to provide fast repair turn-around times.We can also provide troubleshooting assistance to on-site repair technicians.  Contact us with your needs at one of the addresses given in the header.