John Robertson wrote:
Amazing....this machine can be duplicated with a scope and a small AC
power supply. All Huntron did was package it nicely and charge an arm
and leg for.

Circuits for this sort of gizmo were very common in the 70's and are
probably on the 'net

A quick Google search with the terms "circuit diagram curve tester
oscilloscope" found a number of interesting suspects. The one on
Agilent's scope is very nice...

John :-#)#
In the military we called it an OCTOPUS. For an example see:

http://www.tpub.com/content/neets/14.../14191_142.htm

73, Roger

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