Repairing Test Equipment- Agilent 6632B and HP 34401A (unboxing)

I recently purchased two pieces of test equipment off Ebay, a bench multimeter (HP 34401A) and a system power supply (Agilent 6632B). Both items were had for a fairly good price. The 6632B was $60US + about $50 shipping, and the 64401A was $110 + $40 shipping.

These wouldn’t be normal prices for these instruments which is typically $500-800 for the multimeter and the PSU around $200-600 depending on condition and valid calibration. These two I bought were both sold as-is / for repair. After a bit of research I found these and pulled the trigger based on what descriptions of the faults indicated what was wrong with the units. In the case of the PSU the picture in the auction pretty much told the full story. Watch the video below for the unboxing.



Once fixed and calibrated, both will be a valuable asset in my lab. Currently my most accurate multimeter would be an old Fluke 87 or my new EEVblog Brymen 235 but they almost pale in comparison to that of the 6.5 digit 34401A. The tronicsLab doesn’t even have a proper DC power supply. Well, with the exception of a DC power supply made in college with a 5/-12/0-15v adjustable output (LM317 driven so we both know the 0 is not a real spec).

A video for each repair will be made showing the repair of each instrument in the days to come. Stay tuned for more videos involving both of these instruments.



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