Hey All,
Have read many posts on here about wiring in a Tacho but this is my first time posting on here.
Building a 82 XS400 for a friend & have finished everything except the Tacho.
Converting to a Electronic Tacho bought on ebay.
I have tried 2 of the same tacho wiring it to the Coil -. First tacho couldn't get to move at all.
Bought another tacho & wired it with a 0.1mf cap> 1K resistor then T to ( 12V zener diode to ground +) & to tacho... As per the attached diagram & picture
With these pieces I got the tacho to move but at idle the needle sat at 2000, when reving the needle moves quite laggy & then when riding the needle jumped up to 4000 & when reving it moved to 2000.
I have used an oscilloscope & have pictures of the coil - attached
Plus pictures of the circuit & tacho etc.
Note: I have tried various capacitors, resistors & diodes but cant get it right.
Also I have tried spare car tachos I have in the same circuit & they seem to work fine without the extra circuit above. So Im thinking the tacho is just faulty but thought I would ask you all first.
Thank you kindly
Have read many posts on here about wiring in a Tacho but this is my first time posting on here.
Building a 82 XS400 for a friend & have finished everything except the Tacho.
Converting to a Electronic Tacho bought on ebay.
I have tried 2 of the same tacho wiring it to the Coil -. First tacho couldn't get to move at all.
Bought another tacho & wired it with a 0.1mf cap> 1K resistor then T to ( 12V zener diode to ground +) & to tacho... As per the attached diagram & picture
With these pieces I got the tacho to move but at idle the needle sat at 2000, when reving the needle moves quite laggy & then when riding the needle jumped up to 4000 & when reving it moved to 2000.
I have used an oscilloscope & have pictures of the coil - attached
Plus pictures of the circuit & tacho etc.
Note: I have tried various capacitors, resistors & diodes but cant get it right.
Also I have tried spare car tachos I have in the same circuit & they seem to work fine without the extra circuit above. So Im thinking the tacho is just faulty but thought I would ask you all first.
Thank you kindly