Tach question
Thread Starter
Instructor
Joined: Jan 2007
Posts: 196
Likes: 0
From: Ponoka Alberta
Tach question
Hey,
Does any one know, on a 76 what will happen to the tachometer if there is no Filter in the line?
any help would be greatly appreciated.
thanks in advance
peace
Does any one know, on a 76 what will happen to the tachometer if there is no Filter in the line?
any help would be greatly appreciated.
thanks in advance
peace
Melting Slicks
Joined: Sep 2004
Posts: 3,223
Likes: 666
From: Northeast
Feel lucky?
1. nothing will happen
2. you get a spike and fry the circuit board. Spend $60 on a new board and then decide you should have kept the filter.
depends if you want to take the chance.
1. nothing will happen
2. you get a spike and fry the circuit board. Spend $60 on a new board and then decide you should have kept the filter.
depends if you want to take the chance.
Racer
Joined: Jul 2005
Posts: 499
Likes: 1
From: Winnipeg Manitoba
The Tach filter is more of an RF filter designed to reduce noise that could be heard on the radio.
It does very little to protect the tach from spikes on the tach signal line.
The tach circuit board already has a filter on board that protects it from overvoltages on the tach signal line.
The most common failure of this vintage of tach is a blown zener diode on the POWER lines.
