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Recent content by timshrub

  1. T

    Makita charger diode

    I'll give it a bash, thanks a lot. Tim :rolleyes:
  2. T

    Makita charger diode

    Finally! I think I've found a suitable diode. This was after working out that some manufacturers refer to them as 'Fast Recovery Rectifiers', this gave a few more hits on Google. The diode is 1N4937, seems to fit the bill, what do you think Resqueline? Thanks Tim:)
  3. T

    Makita charger diode

    Thanks Resqueline, I'll have a closer look.
  4. T

    Makita charger diode

    Just found some more which fit the Current/Voltage requirements but there is no mention of them being a switching diode. What makes a switching diode a switching diode? Thanks Tim
  5. T

    Makita charger diode

    Hello again Regarding the replacement diode for this makita charger I'm working on, I've found various suitable replacements on the internet. They all seem pretty beefy compared to the faulty component but otherwise have the required specs. As far as the switching speed goes I'm not really sure...
  6. T

    Makita charger diode

    Hello Resqueline Thanks very much for the advice, now I can proceed. As I said, I am just a beginner and there is absolutely no substitute for experience and knowledge, which I obviously lack. Very much obliged. Thanks also to you, Steve, for your contribution, things sometimes seem a bit...
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    Makita charger diode

    None of the brown staining caused by overheating was due to me by the way.
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    Makita charger diode

    Here's a shot of the reverse side of the pcb with the diode mounting holes about in the centre of the frame. The diode was tested with a dmm with one of the leads removed and showed almost equal resistance in both directions. As I understand it, diodes of any type should exhibit very high...
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    Makita charger diode

    Here are two photos, one of the diode in question, and one of the symbol on the pcb (marked D5, next to the burn mark....)
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    Makita charger diode

    Hello Steve None of those actually! Sitting here looking at the pcb, the symbol looks a bit like a capital 'M' with long legs. Now I've looked a bit closer, all the other diodes (some of which are definitely run of the mill glass germanium diodes) have a symbol which is a white rectangle with a...
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    Makita charger diode

    By the way, its 3mm long and 2mm in diameter. Thanks Tim
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    Makita charger diode

    Hello Resqueline Thanks for the reply. Its definitely some kind of diode, the pcb is clearly marked with the diode symbol and the component is labeled as 'D5'. It has a black plastic case marked at the cathode end with a silver ring, the numbering is also in silver. I thought diode codes always...
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    Makita charger diode

    Hello all. I'm trying to repair a makita battery charger and need to identify a diode. Diode is marked as either 16N8H or H8N91 not sure which. Any help would be very much obliged. Thanks
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