GatorMail-Q Re: Cathod ray oscilloscope
Roger Taylor writes:
You can use an ordinary scope. [...]
\Wraping a band of aluminum foil around the spark plug wire will
act as a capacitor coupler[...]
**** You don't need aluminum foil. Just wrap a piece of insulated wire around
the spark plug wire. Three or four turns should do nicely. You can also get
lots of good information off the primary waveform, available at the points
terminal. For a good description of using a scope, complete with waveform
pictures, see "Automotive Test Equipment You Can Build" by Edward Evenson.
- Jerry
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