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Thread: Help! Tacho wiring

  1. #1
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    Default Help! Tacho wiring

    I do hope someone can answer this 'cos Maplins were useless!



    I've got a Skydrive digital Tacho/hourmeter, but the wiring isn't long enough, and worse I've somehow lost the stiff bit of wiring at the end that was wound around the HT leads.

    It looks like a type of coaxial wire??



    What sort of wiring do I need?

    Where can I get it from?

    Do I solder both bits of existing wire to the extension wire, or do I only solder the core wires together?



    [color = red]<font size="4">HELP![/COLOR][/COLOR] Before I Blow up an(other) engine.


  2. #2
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    Default Re: Help! Tacho wiring

    If it's anything like the tinytach, you need to connect tthe cores, insulate, then connect the screen. Any bit of single solid wire will do for the pick up, just solder on to the core and earth to the screen. I have used a bit of ordinary electrical wire out of some twin and earth for the pickup in the past

  3. #3
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    Default Re: Help! Tacho wiring

    it is RG174 50ohm coxial cable, as ewan says you need to join the central conductor, (with a hook and solder joint, and then heat shrink) tease out the screen and solder this also, heat shrink the lot.



    earth the screen to the engine and most certainly a bit of solid copper wire from the back of the cooker will do around the HT, sleave it tho!



    http://www.maplin.co.uk/Search.aspx?...ia=rg174&sourc e=15&SD=Y



    maplins sell it!



    hope this helps
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    Default Re: Help! Tacho wiring

    Quote Originally Posted by dangerman
    it is RG174 50ohm coxial cable, as ewan says you need to join the central conductor, (with a hook and solder joint, and then heat shrink) tease out the screen and solder this also, heat shrink the lot.



    Earth the screen to the engine and most certainly a bit of solid copper wire from the back of the cooker will do around the HT, sleave it tho!

    http://www.maplin.co.uk/Search.aspx?...ia=rg174&sourc e=15&SD=Y



    maplins sell it!

    hope this helps


    You Bet it Helps!

    By Hook & solder, do you mean winding the two ends together before soldering?
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    Default Re: Help! Tacho wiring

    Just to avoid the idiot mistake...



    Is the Screen the outer wire cable or the CORE cable??
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    Default Re: Help! Tacho wiring

    in order to stop the solder joint breaking under vibration, you bend a little hook in each end and solder that, rather than laying them against each other, and or twisting them when flat!





    the screen is the woven braded outer on the coax! its important this does not touch the inner core!




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