HP 3245A repair
Precision source with an ugly power supply 
Personal Projects
Keithley 2000 repair
6.5 digit multimeter with a simple ADC failure 
Probe Deskew Tool
Correct for skew between current and voltage probes 
Keithley 580 Micro-Ohmmeter
The meter that started it all 
HP54602B Repair
My first oscilloscope 