Tach op amp needed for my '90 ZR-1 - ZR-1 Net Registry Forums

Paul Workman · 01-08-2012

Apparently, the op amp driver for my tach is fried...long story. Anyway, I'm appealing to anyone that might have either information as to where to get it, or even the part itself?

The chip is stamped with the numbers

9907A
CS8939J

I'm hoping there is somewhere I can cross-reference it to an OEM.

Note to self: Don't use alligator clips on resistor leads. Next time solder the the fkin connection (while calibrating the tach).

P.

01-08-2012	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Tach op amp needed for my '90 ZR-1 Apparently, the op amp driver for my tach is fried...long story. Anyway, I'm appealing to anyone that might have either information as to where to get it, or even the part itself? The chip is stamped with the numbers 9907A CS8939J I'm hoping there is somewhere I can cross-reference it to an OEM. Note to self: Don't use alligator clips on resistor leads. Next time solder the the fkin connection (while calibrating the tach). P.