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  • Users: simos
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  1. S

    Kundo Kundo Coil/transistor Testing

    Yes, I agree. I'll give it a go, nothing to lose now. Thank you and the other contributors for your advice.
  2. S

    Kundo Kundo Coil/transistor Testing

    Yes, I appreciate the difficult soldered joints are inside. Today I've de-soldered the transistor and taken some measurements (using my cheapo Chinese DMM). I'm assuming the the transistor wires are E, B, C from left to right, looking at the closeup photo in my original post, above. So...
  3. S

    Kundo Kundo Coil/transistor Testing

    Hi, that sounds like good advice! I was thinking of getting something better; I'm just looking at your BSide ESR02 Pro . . . hmm, does it also measure the usual A/V/O units? Maybe at the moment I just need a better multi tester with the usual V/A/O and with a proper semi conductor test...
  4. S

    Kundo Kundo Coil/transistor Testing

    As I said at the beginning, I'm no electrician. I think I'll remove the transistor and maybe buy a replacement - I've read an AC125 would do. I'm encouraged by your earlier remarks about the coils being unlikely to have failed. Thanks for your advice.
  5. S

    Kundo Kundo Coil/transistor Testing

    Hi Raymond, Thanks for your sketch, very helpful. I've done what you said on the transistor, which is still connected into the circuit (not removed). BTW because it is inside a housing it's very difficult to see it there's a larger gap, I'd say the 2 gaps are the same (using a jewellers...
  6. S

    Kundo Kundo Coil/transistor Testing

    Hi, I'll try to reply to this and the other 3 above, and thank you. Incidentally, I've found what I believe to be the Kundo circuit I've got, attached. And just to clarify, my test readings were done without the battery connected. If I connect the meter (set to 20k ohms) across the battery...
  7. S

    Kundo Kundo Coil/transistor Testing

    Hi Kundo experts! I'm attempting to return my Kundo electronic to working order - incidentally it's one of the more recent models with a triangular shaped base and case. The symptoms are that it won't run. I've had a number of this and the ATO type clocks so am familiar with all the usual...
  8. S

    ATO Junghans ATO Electronic

    As I said, above, I wasn't sure about anything! But I believe the old OC33 transistor was faulty, and the replacement solved the problem.
  9. S

    ATO Junghans ATO Electronic

    Hi, Thanks for your thoughts on this. After a lot of investigation, (bearing in mind I'm no electrician!) I was able to resolve all the issues I had. It may be useful to others with ATO issues if I summarise how I finally got to a fully working clock! Just to reiterate, I was originally faced...
  10. S

    ATO Junghans ATO Electronic

    Hi, The query relates to an ATO electronic (transistorised) clock, which I attempted to restore 7-8 months ago. I’m sure you know these clocks use the same principle as the Kundo, but have 2 coil drums rather than one; one being a dummy. Anyway, this ATO showed on doing a resistance check that...
  11. S

    ATO Junghans ATO Electronic

    Frank, Thank you. It was very difficult to measure accurately the 2 wire diameters, but I now think the new wire is around 25% smaller than the original, and therefore presumably a higher resistance per metre. I will use a 3V supply, but do you think this will mean a higher current and...
  12. S

    ATO Junghans ATO Electronic

    Hi, I’m attempting to repair an ATO Electronic Anticlimatic clock, which is in good condition apart from one of the coil windings being open circuit. The three coloured wires, red, blue, green initially gave resistance values 1.6K (B-R) and zero (G-B); the clock would not run. The coil wire...
  13. S

    Atmos 540

    Thanks again, I will encourage my man to apply lubrication to the mainspring!
  14. S

    Atmos 540

    Ed O'Brien Thanks, but could I just check you're talking about the 540 model specifically. The reason I say this is because of what I've read in this link: http://www.abbeyclock.com/atmos540.html where it says, ref Fig 5, that the mainspring should not be removed, and by implication, not...
  15. S

    Atmos 540

    And just to add one thing, I've just spoken to the clock dealer to tell him I'm taking it back for yet another go at fixing it, and he's convinced from my description of the symptoms that the pendulum or tube is 'rubbing at the top'. I also asked him if he lubricated the mainspring, and he said...
  16. S

    Atmos 540

    Thanks for your comments. Like new_hamster I'd be surprised that anything in the basic clock 'set-up' could go wrong, having previously run so well for 5 years, unless it was indeed introduced in the cleaning or servicing process! But as I've said the shop in London is reputable and specialises...
  17. S

    Atmos 540

    Hi, My first post on this forum. I've owned an Atmos 540 for 5 years, bought from a reputable clock dealer in London UK. It had been serviced and cleaned, and ran fine until about 8 months ago, when it stopped. I returned it to the dealer, who cleaned it and said all was fine. It has since...
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