HP3245A Article added, with detailed repair procedure, boards overview and benchmarking.
Detailed article from TEKTRON is ready. Enjoy repair and modifications progress.
Digital domain and DC PCBA are fixed. Was working and passed selftest, but failed after a day of use.
Tomorrow will be first assembly with replaced parts and power on analog side. Full worklog
Cleaning rusty steel chassis frame of precision DMM HP 3458A. Article draft available here
Added new nano-voltmeter Keithley Model 182-M review and teardown. Useful tool for low-voltage measurements and noise analysis.
New step-by-step guide added, covering National Instruments GPIB-USB-HS interfacing on RaspberryPi.
Added simple online interactive calculator to convert noise density figure to specific frequency band AC RMS noise voltage.
Keithley SW-468 switch for Model 2000 repair project received.
Added feedback comment system to articles for user input and comments. Now you can follow us on Disqus
Server migrate to much bigger storage and faster system during this week. Sorry for possible downtime, we will be back online soon. Maintenance finish estimate at 25 May.
Published article about repairing Keithley 2001 7.5 digit multimeter
Added firmware binaries for Keithley Model 2001 (Ver.B06) and Model 2400. Thanks for contributors.
xDevs.com looking for Django + Python developer to work on website development. Those who interested, please contact skype:tin_topmods