The Amp Hour episode #20 talks a bit about the Bob Parker ESR meter. The mention starts at the 10:05 mark and ends around 12:15.
http://www.theamphour.com/
I have no idea of the history as described by Dave Jones (eevblog) is accurate or not.
http://www.theamphour.com/
I have no idea of the history as described by Dave Jones (eevblog) is accurate or not.