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  1. Berry Greene

    Kundo won't stay running

    You have done really well and I can identify totally with the emotional side of fixing things that have a personal sentimental value. Never mind about the help which also gives pleasure the givers, just count your luck on getting such a good result at an early stage. That luck is only made...
  2. Berry Greene

    Kundo won't stay running

    Of course you're quite right about that Wayne. Its the challenge. I have had "drives" to improve my own collection of 400 day models. It worked for a while but only for months rather than a year. I'm talking about timekeeping primarily. They have it in them to be very good. As you say - brass is...
  3. Berry Greene

    Kundo won't stay running

    Wayne et al; That's a wonderful madness that you have there. A glutton for punishment and more torture. Unless and until someone dreams up a simple interlock that will prevent flutter - I will resist more mechanical torsions. How come the Atmos claims are so good? Its a heavy disc type...
  4. Berry Greene

    Kundo won't stay running

    Oh Wayne - don't they just. {Multiply). I think they even argue with each other in the night. They certainly gang up on me. Best rgds. BerryG
  5. Berry Greene

    Kundo won't stay running

    RJDJ2000 All the people of this Forum have been so generous and encouraging to me. I feel a debt like you do. If we can only encourage its something. I have moved on to encompass the strikers and chimers, alarms and 36hr jobs, the watches too when I don't shake too much, as well as the 400 day...
  6. Berry Greene

    Kundo won't stay running

    Everything needs to be spot on before you start. There's so little latitude and that's what makes them hard work. You're asking for a year of operation from a pretty ordinary size of mainspring. Quite apart from driving the escapement, the hands have to turn all those days from a single...
  7. Berry Greene

    Kundo won't stay running

    They really know how to break your heart do these 400 day variety. BerryG
  8. Berry Greene

    Purpose of pendulum suspension springs

    Wow-ee! An eye-opener to the simple. Got it! Whats the down-side? Learned so much from this site. Thanks again - BerryG
  9. Berry Greene

    Purpose of pendulum suspension springs

    Thank you so much for that very full and prompt reply which I am in your debt for. I have ordered some more suspension springs as I think this must be a combination of it being too stiff and maybe reduced power in the train. One positive seems to be that the accuracy is very good. The movement...
  10. Berry Greene

    Purpose of pendulum suspension springs

    I came here looking for more practical, rather than theoretical, issues on the pendulum suspension - interesting though it is. The stiffness of the spring must be an issue when it comes to the selection of a replacement. Is there a measurement method? Just as important, it seems to me, is the...
  11. Berry Greene

    Purpose of pendulum suspension springs

    Interesting thoughts. I want for the torsion too but I would take issue with the idea that gravitational effects are minimal. I don't think they are, as a similar idea has been used to detect earthquakes. More than that - it has been my experience that tiny changes in the weight of the pendulum...
  12. Berry Greene

    Electronic chimes

    I am going to answer my own question here. Upon examining the micro-switch further I had to deduce that the action is neither N/C or N/O. This guy needs to be NN/O (Nearly Normally Open!). To counter the bounce problem the cam actually widens the N/O contacts and allows it to ping to momentary...
  13. Berry Greene

    Electronic chimes

    Its a question really. a Modern MDF Wall clock with all electronic plastic parts. The pendulum is a plastic replica of a grid-iron driven by an electronic unit. The Chimes are a separate little plastic box activated by a switch from within the quartz driven movement. That movement has a switch...
  14. Berry Greene

    Fluttering

    Ha Ha! Oh you gotta laugh. A bit of string...... Thanks for that response Nathan S. It turns out that the length of the suspension spring has a quite tiny effect on the rate. Its thickness works contra to common sense, and flutter is like the work of a leprechaun. Thirty day regulators do at...
  15. Berry Greene

    Fluttering

    Reading through my post of yesterday I find myself wanting to expand or edit it slightly. Narrowing down the cause of flutter is one thing. A cure is something different. I think we are talking here about the power in the system matching to the natural rotation and furling / unfurling of the...
  16. Berry Greene

    Fluttering

    I just gotta say that it has been my experience that these clocks are always on the edge of flutter. Its a most misleading phenomenon as the clock can be rated to go slowly and use the random flutter to make up the lost time. It is therefore not truly isochronous. We can ask if that matters and...
  17. Berry Greene

    1982 Metamec 4.19MHz quartz mantel clock, a couple of questions

    I have one of the Metamec's with the 4.19Mhz quartz Xtal movement. I bought it 2018 for £10 inc carriage (£3) and it wasn't working. I rummaged around and found the trimmer was busted. Not having one I fitted two 47pF caps in place of it and the other half of the 22pF voltage divider assuming...
  18. Berry Greene

    Fixing over-swing in Quartz movements w/ fake pendulum

    It seems so obvious put like that. Thanks for the post - excellent. I was taken with the post about midnight magnet grinding. Oh boy do I know that tired time when judgement is thrown to the wind in some kind of angry desperation. I usually prefer reversible solutions. This is a slightly...
  19. Berry Greene

    Horolovar and thousands of suspension springs

    Hi David, - Thanks for the response. Be very careful with those pin-pallets. They snap off like carrots if you're at all heavy handed! I am certainly not an "expert" but over these last few years I have had hands on with many of the post-war "novelty" variety that were a favourite amongst our...
  20. Berry Greene

    Horolovar and thousands of suspension springs

    Love your post expressing that same old agony I feel myself. I especially like your adapted quote on insanity...... It fits the bill on every level. Ga! Ga! Rgds, BerryG
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