Tech Notes Columns

I started writing my Tech Notes Column for the agricultural publication, Dealer Progress in 1996. My company Agri-Tech had been selling, installing and maintaining electronic controls for custom applicators and we were on the leading edge of precision ag working in three states.

Tech Notes has tried to pass on valuable training information for the field technicians, the guys that keep all the technology running the machines.

These early Tech Notes are available at “tech notes archive”. I left the advertising in place as I scanned the magazines. Thought you might get a kick out of seeing high tech in the late 1990s!

I started writing Tech Notes again in 2016. The Tech Notes columns have been published in print in CropLife IRON and you can find at and search Tech Notes or John Dignan. Precision Farming Dealer has also run Tech Notes features.

The series of Tech Notes columns can be a very useful training tool for new field techs or serve as a re-fresher for the more experienced.

Let us know what you think of the Tech Notes Columns. Please send any comments or suggestions for new columns to me at

John Dignan
Senior Engineer and Founder at Ag-Tester