Going through some older post I came across one in which claims were made about problems with some of the older system check tachometers. Can anybody enlighten me on what years these issues were occurring? and what were the issues/problems. Thanks.
You'll need to be more explantory with your request. I personally started in this line of ework back in 1960 when there were no tachometers, than learned the systems as they came into being. As it stands, I have no idea of what you speak.
If you're asking about all of the tachometers made from day one and the possible problems they could encounter, that's going to be difficult if not impossible to answer.
