one time when chasing a really screwing problem i had my OScope (a rather old one) out and plugged it in with both traces to compare some delays. you can get the ignition pulse by just laying a lead next to one of the ignition wires. for tach it doesnt really matter which one. then use the normal dividing and multiplying of pulses per centimeter of screen at time displayed. but i have never seen a tach that was off by very much one way or another that wasnt within the range of deviation. even digital tachs have to report by sampling. a lab grade tach would be far to expensive. jimt On Wednesday, Oct 16, 2002, at 23:24 America/Denver, Leon Korkin wrote: > Volks, > I know there was some talk re signal to tach in the past. > Would like to get or make tach checking device just to > quickly test tach at a set value. Anybody knows what would this signal > be? Square vaweform? Frequency? > TIA > Leon > 85 Subwagen Westy > |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.