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  1. S

    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.
  2. S

    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...
  3. S

    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...
  4. S

    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...
  5. S

    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...
  6. S

    Atmos 540

    Thanks again, I will encourage my man to apply lubrication to the mainspring!
  7. 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...
  8. 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...
  9. 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...
  10. 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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