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  1. #11
    Join Date
    Aug 2004
    Location
    Christchurch, NZ
    Age
    60
    Posts
    2,509
    When my Unilite module like that went phut I just brought the sensor wires out and used them to trigger an external box such as a Pirana. Way cheaper and it's run for years like that. Another important point with the Unilite is that you MUST run with an in-series resistor (ballast resistor) in the coil LT.

    Looks like Pirana is sold under the name of Newtronic now.
    Last edited by mylesdw; 27-04-21 at 09:50 PM.
    Cheers

    Myles D-W

  2. #12
    Join Date
    Jan 2006
    Location
    Chelmsford Essex
    Posts
    1,670
    Hell there is not a lot in it . About £5 of parts. Think there must be a hall effect transistor which is used to be triggered by a magnet is usually how these work . You should be able to check the diodes with a meter if it's got a diode setting. The sensitive part is the hall affect which might of popped. Look at CPC for parts .R..S components are good if you want next day but a bit of a premium

  3. #13
    Join Date
    Aug 2004
    Location
    Christchurch, NZ
    Age
    60
    Posts
    2,509
    I think they are optical rather than Hall-effect. Just an LED and a sensor. Only need to bring three wires out. The advantage of doing it this way is that there is nothing left in the distributor that is likely to break. The Pirana box I used cost about forty quid as far as I remember so I carried a spare (which I never used!)
    Last edited by mylesdw; 27-04-21 at 11:39 PM.
    Cheers

    Myles D-W

  4. #14
    Join Date
    Jan 2006
    Location
    Chelmsford Essex
    Posts
    1,670
    There is not a lot inside. They have a real mark up on about £5 worth of electronics. I fitted a Pertronix replacing my Mallory dual.points and never missed a beat.
    It looks repairable and good thing is it's not resin potted which is a real surprise.

  5. #15
    Join Date
    Oct 2013
    Location
    Ilford essex
    Age
    50
    Posts
    163
    If I can't get hold of the components I will take a look at those other suggestions, many thanks
    Dax MK4, RV8

    Better to try, and fail....than to fail to try.

  6. #16
    Join Date
    Sep 2004
    Location
    Broughshane Ballymena Northern Ireland
    Age
    69
    Posts
    524
    Hi , Were you able to repair your unit ?
    Jim

  7. #17
    Join Date
    Oct 2013
    Location
    Ilford essex
    Age
    50
    Posts
    163
    Quote Originally Posted by jrv8 View Post
    Hi , Were you able to repair your unit ?
    Jim
    Afraid not, could get the chip anywhere so ended up buying a new unit from a Corvette supplier for £60.
    Dax MK4, RV8

    Better to try, and fail....than to fail to try.

  8. #18
    Join Date
    Jan 2006
    Location
    Chelmsford Essex
    Posts
    1,670
    Quote Originally Posted by bigkev38 View Post
    Afraid not, could get the chip anywhere so ended up buying a new unit from a Corvette supplier for £60.
    What was the broken transistor part no that you were trying to source? I have lots of different supplier sources. Might give you a spare unit for a few pounds or sell on. Always one to repair things to component level.
    John Desz

    Essex & Herts Area Rep. UKCC

    Dax 351 Cleveland T5 2.88 PL

    Events posted and meeting updates follow Face Book.

    https://www.facebook.com/groups/170236225077355

  9. #19
    Join Date
    Oct 2013
    Location
    Ilford essex
    Age
    50
    Posts
    163
    Quote Originally Posted by jon1d View Post
    What was the broken transistor part no that you were trying to source? I have lots of different supplier sources. Might give you a spare unit for a few pounds or sell on. Always one to repair things to component level.
    Hi Jon, we did all the usual web searches and came up blank, if you can find one that would be great.

    Here's a picture of it close up.

    Dax MK4, RV8

    Better to try, and fail....than to fail to try.

  10. #20
    Join Date
    Jan 2006
    Location
    Chelmsford Essex
    Posts
    1,670
    [QUOTE=bigkev38;607855]Hi Jon, we did all the usual web searches and came up blank, if you can find one that would be great.


    Hi,

    CPC Farnell do the component. The case style package is different but you can modify the case if required. The centre pin2 is common with the case and is not required.

    Bargain £1.20 +vat plus p/p.

    https://uk.farnell.com/on-semiconduc...st=ngp15n41clg
    John Desz

    Essex & Herts Area Rep. UKCC

    Dax 351 Cleveland T5 2.88 PL

    Events posted and meeting updates follow Face Book.

    https://www.facebook.com/groups/170236225077355

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