Happy New Year! Progress summary for 2015
Published: Dec. 30, 2015, 10:22 a.m.

Summary and our progress during year 2015, and some future plans. Happy New 2016!

XMAS time for precision project at
Published: Dec. 21, 2015, 6:55 p.m.

Perhaps you wonder how Xmas looking for volt-nuts? Well, happy X-mas here, got some happy aged LTZ1000, LM399 and resistors to play with. Read in.

Two new articles, Neutron ATE and L&N decade review
Published: Dec. 16, 2015, 7:08 p.m.

Two articles online, our own PSU ATE unit project, Neutron and L&N 4754 resistor decade review KX LTZ1000/LM399-based reference article online
Published: Dec. 9, 2015, 10:34 a.m.

Article about our own ultra-stable LTZ1000/LM399 voltage reference is published. Check it out.

New article covering HP 3245 Universal source
Published: Nov. 4, 2015, 10:02 a.m.

HP3245A Article added, with detailed repair procedure, boards overview and benchmarking.

New repair article - HP 3456A DMM worklog.
Published: Oct. 29, 2015, 10:45 a.m.

Detailed article from TEKTRON is ready. Enjoy repair and modifications progress.

Repair progress update on HP 3458A
Published: Oct. 11, 2015, 1:19 p.m.

Digital domain and DC PCBA are fixed. Was working and passed selftest, but failed after a day of use.

HP 3458A first test assembly with new parts
Published: Oct. 4, 2015, 5:18 p.m.

Tomorrow will be first assembly with replaced parts and power on analog side. Full worklog

HP 3458A - Repair update, cleaning chassis
Published: Sept. 28, 2015, 3:40 p.m.

Cleaning rusty steel chassis frame of precision DMM HP 3458A. Article draft available here

Keithley Model 182-M sensitive voltmeter reviewed.
Published: Sept. 25, 2015, 12:14 p.m.

Added new nano-voltmeter Keithley Model 182-M review and teardown. Useful tool for low-voltage measurements and noise analysis.

Added new article about usage of NI USB-GPIB-HS with Raspberry Pi
Published: Aug. 15, 2015, 9:42 p.m.

New step-by-step guide added, covering National Instruments GPIB-USB-HS interfacing on RaspberryPi.

Added new calculator for noise density En math.
Published: Aug. 3, 2015, 7:05 p.m.

Added simple online interactive calculator to convert noise density figure to specific frequency band AC RMS noise voltage.

Received replacement switch Keithley SW-468
Published: July 22, 2015, 8:12 p.m.

Keithley SW-468 switch for Model 2000 repair project received.

Added comment engine to website articles and service pages
Published: July 3, 2015, 9:05 p.m.

Added feedback comment system to articles for user input and comments. Now you can follow us on Disqus

Server migration - services might be temporary unavailable
Published: May 18, 2015, 5:51 p.m.

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.

Repairing Keithley Model 2001
Published: April 7, 2015, 10:17 p.m.

Published article about repairing Keithley 2001 7.5 digit multimeter

Uploaded Keithley 2001 B06 and 2400 C10 firmwares
Published: March 25, 2015, 5:22 a.m.

Added firmware binaries for Keithley Model 2001 (Ver.B06) and Model 2400. Thanks for contributors.

Django+Python developer wanted
Published: Jan. 29, 2015, 6:33 a.m. looking for Django + Python developer to work on website development. Those who interested, please contact skype:tin_topmods

Articles are split into sections per type
Published: Sept. 18, 2014, 12:53 a.m.

Articles are split per type into guides, repair worklogs, reviews of production gear and general articles. Division is set to aid easy navigation and resource search.