I installed a Tiny Tach on my A65 w/Slick mags and initially I couldn't understand how a coil of a few turns of wire wrapped around a shielded plug wire was going to pick up a signal, but I followed the instructions anyway. Well, it didn't, so I opened the shielding up with a scribe just enough to coil the signal wire around the plug wire behind/inside the shielding, solving the problem. The tach indication was accurate when checked against an optical tach, and it was still functioning fine after more than 4 years & 400 hours without a change of batteries. I'm with Jeff. I too imagine that electronic ignitions could give different results.
Ken Jones, kenbjo...@cinci.rr.com Sharonville, OH EAA Chapter 974 - www.eaa974.com - Home of 6 KRs
