By popular demand, we proudly bring you Martin Catt's three-part article on building and using a variable voltage power supply for testing quartz movements. These articles are provided in Adobe PDF format, and are published here with permisison of the author. The third article has many diagrams and photos and is quite large (approximately 4.5MB). It is not recommended for download unless you are on a broadband Internet connection (cable or DSL). For best results, download the files to your computer and then view or print them. This can be done by right-clicking the link below and then choosing "Save Target As..." or "Save Link As..." (depending on browser). Our thanks to the author for making these articles available to the horological community.

Power Supply Considerations for Measuring Lower Working Voltage Limits

Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 1

Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 2

If you have difficulty downloading the third article (above) it is also available split into two parts:

Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 2a

Building a Variable Voltage Power Supply for Testing Quartz Movements, Part 2b

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Comments, questions, and observations can be sent to Mr. Catt at: mlc.power@comcast.net
All information contained in these articles protected by copyright, © Martin Catt 2005.