Looking for low-cost ignition analysis 'scope

[Jason Hawken]

>This is something I have been wanting to do for a while as I find it
>fastinating that you can assess an engine's condition just by looking at
>the spark waveforms.
>
>I have tried he approach of using a "Lab" scope with the inductive pickup
>from my timing ligt for trigger and a piece of metal over the coil in the
>middle of the GM HEI distributor (this is the way the Heathkit analyser
>works as well as other prfessional units I have seen). The interfacing is
>not a problem, where I ran into problems is that the repitition rate of the
>signals from the engine are so slow at idle that the scope does not have
>enough persistance to keep the display on the screen.  When I did this
>(about 10 years ago) I used a Tek 465 100Mhz scope maybe a lesser scope
>would be better but I doubt it because the signal is pretty slow (600 RPM =
>10 RPS /2 = 5 triggers per second).

Well is what you need is a new scope with a write feature.  With this
feature, the scope will keep the display on the screen even after it has
disappeared!

CFN:JH
+------------------------------------------------------------+
+  Jason Hawken                            Ottawa, ON        +
+  jhawken at magi.com                        (613) 728-9043    +
+------------------------------------------------------------+