I sent my tach off to Mike Mancini at Instrument Specialties.
www.instrument-specialties.comInstrument Specialties, Inc.
14 Church Street
Oxford,MA 01540
You guys might remember Mike as he's a board member here (board member "MikeMancini") and he's the fellow interested in doing the body restoration on the Reynolds tribute project.
Mike has the tach and said that it has a lot of garbage in it which will reqire it to be fully demagnetized, cleaned, magnetized again and then calibrated.
I let you all know how everything turns out.
Chris