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speco tacho (diode)
https://www.ausmini.com/forums/viewtopic.php?f=2&t=41205		 Page 1 of 1
Author:  Caponix [ Fri Apr 18, 2008 11:58 pm ]
Post subject:  speco tacho (diode)
hey guys

firstly before i get flamed for not using the search tool...i have :lol:

so anyway:
i am going to be wiring up the tacho tommorow. i reckon ill have no problems wiring up most of it (ive allready got a tacho installed, so i can trace wires) but the one thing that has me muddled, is the instructions tell you
"for Points ignition vehicles
when fitting a speco meter tachometer to points ignition it MAY be necessary to fit the enclosed 1 amp rectifier diode"

it then goes on to say that for 'mini minors':
"many of these vehicles will not operate an aftermarket tacho when fitted. it may be necessary to fit a 3amp universal diode in line in the coil wire"



SOOOOO>
my questions are:
1. if i wire up the tacho without the diode (it may not nned it, correct??? :? ) will this cause any damage to the gauge?

2. should i be wiring up the 3amp universal diode from the very start?

3. (if applicable) HOW do i wire in the diode.....from my research and basic electronics i know it goes on the wire (duh), but do i cut the wire, solder in this diode inbetween the two bits of wire.....OR....???????

Cheers guys

(oh and mods if you wanna move this thread to somewhere else thats allgood) :lol:
Author:  Wombat [ Sat Apr 19, 2008 8:58 am ]
Post subject: 
If you need a diode and don't put it in there is a high probability you could bugger the taco. Put it in anyway - won't harm if not needed

Put it at either end of the connecting wire - no need to cut unless you can't get at the ends - and yes solder the connections and preferably shrink wrap the joins
Author:  drmini in aust [ Sat Apr 19, 2008 9:07 am ]
Post subject: 
Wombat wrote:
If you need a diode and don't put it in there is a high probability you could bugger the taco. Put it in anyway - won't harm if not needed

Put it at either end of the connecting wire - no need to cut unless you can't get at the ends - and yes solder the connections and preferably shrink wrap the joins

Don't solder until you have tested it, if the diode is reversed the motor won't run. 8)
Author:  Caponix [ Sat Apr 19, 2008 12:12 pm ]
Post subject: 
Wombat wrote:
Put it at either end of the connecting wire - no need to cut unless you can't get at the ends - and yes solder the connections and preferably shrink wrap the joins


sorry i just want to check...
um...so ive got my green wire thats heading to the coil.....do i cut that wire and solder in that diode (after testing which direction it faces) in between those 2 bits of wire??

thanks
Author:  Mick [ Sat Apr 19, 2008 12:34 pm ]
Post subject: 
Yes.
Author:  Kennomini [ Sat Apr 19, 2008 1:22 pm ]
Post subject: 
Show us your guages
Author:  Caponix [ Sun Apr 20, 2008 12:39 am ]
Post subject: 
thanks heaps for the help guys

installed it tonight....had a few hiccups due to the diode, firstly not facing the correct way, then not getting connection to the wire (what do you expect when a lazy-ass like me puts it in elec tape and expects it to work :lol: ) , but now its working nicely. 8)

thanks again :D
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