Jump to content

MrRoundel

Member
  • Content Count

    416
  • Joined

  • Last visited

  • Days Won

    7

MrRoundel last won the day on February 15 2019

MrRoundel had the most liked content!

About MrRoundel

  • Rank
    WRT Addict

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. I knew an optician who used to have people come back in with glasses saying, "I just can't see with these new glasses." As his story goes, after the second time of adjusting various things on the fit of the specs, he'd just nod and take them in the back. He said that he'd put the specs down on a table and dance around them, chanting various mystical chants that implored the spectacle gods to make them right. He'd then hand them back to the patient, who would often smile with acceptance before walking away happy, and without knowing the miracle they had just been a part of. Yours must be frustrating because it's easy to prove that the watch is working, which you do. With eyeglasses you can't experience what the wearer is. Perhaps you should suggest that they get their eyeglass prescription updated. I know a guy...
  2. I have been concerned about the coronavirus being transmitted via the mail from the beginning. I thought that it may be the reason why so few young children seem to have been contracting the virus. After all, with few exceptions, mail is usually retrieved and handled by adults. Just a hair-brained theory I had. Who knows if it has any validity. With one stupid exception, I have washed my hands immediately after opening the mail. After that brain-flatulence, I know bring in the mail and drop it in a bin. Two days later I open it. If something is in a plastic container/envelope, I will handle it more carefully, as it is reported that the virus can last 72 hours on plastic. Our overuse of plastic may get us yet. So yes, I agree that mail transmission has to be considered as we work our way through this pandemic. Gloves, hand-washing, mail quarantine bins, whatever it takes to outlast the spiky little devils. Stay healthy all. Cheers.
  3. Adjusting the trimmer capacitor didn't have any effect on the movement. This morning I received an alert that a seller on the auction site had NOS parts for the C641movement. After verifying that it was indeed NOS, I ordered it from overseas. Fingers crossed that it works. I'll have to work on removing the old one from those posts. I'll report back once the part arrives to see if I can get some more expert advice on replacing the part. Thanks again, all. Stay well.
  4. Thanks for your troubles, JohnR725. All good reads/references. I did find an image of a 350 series GP quartz on Hodinkee. It showed the types of clips you mentioned. They do indeed look easier to deal with. I will pop the back off today and take a look at that area where the negative contact drops down under the battery. Thanks again. Cheers. C350 image ~ half way down.
  5. No, I'm not sure. Most coils in quartz watches I've seen have visible windings. I just figured it was the coil based on its size, shape, and that it had two leads. That and the fact that the literature that JDM provided the link to has the two pins that the "dumbells" attach to as test points for what they call the coil. That said, they didn't have an obvious connection to what you say may be the crystal. BTW, I'm sure you're right about that. I was basing it mostly on inexperience. Thanks again, AndyHull.
  6. Yup, pull out those old projects to see if skills have progressed enough to complete them. I'm looking at my lathe as it calls to me to really learn how to use it, especially to make a balance staff. Of course I might have to find a higher table/bench to place it on, as where it is is pretty low and my neck doesn't like it. Yes, everyone be careful. I'm using hand sanitizer (Purchased a few days before the big run on it.) whenever I'm out and have touched shared surfaces, etc. Lots of hand washing. too. I do have a couple of N95 masks that I've had for a while. I might wear one the next time I go to the market. That said, if I can stay far enough away from other shoppers I probably won't need it. It may be best to save it in the event that I do get sick with the virus. Take care, all.
  7. Thanks, AndyHull. Yes, it would be nice to get it running. Overall it's a very nice watch and the quartz movement is of pretty high quality. Maybe not for serviceability, but it is well put together it appears. Virtually every one of these C641 movement watches is either not working or has been retrofitted to a more modern quartz movement. Had I have known how difficult/impossible it is to repair them I'd have passed on the purchase. Still, it's a very nice looker, IMHO, and is worth retrofitting. The coil on this watch appears to be encased in aluminum/aluminium, rather than having wire that can be soldered. It looks more like an old capacitor than it does a coil. You can see it in the images. At this point I have carefully reassembled the watch and put it aside until I can figure out what movement to put in it. Thanks again for all of your help and input. Cheers. The watch has the original marked GP leather band on it. It wasn't worn a lot. I wouldn't be surprised if it has been in the dead zone for quite a few years. I believe it is from the late seventies to early eighties.
  8. Thanks, jdm. All I know is that my meter is one that is made for using with automotive electronics. UEI is brand. As I said, at least I started with the lowest range on ohms setting. It's possible that I torched the wire within the coil. It's also possible that it was torched before. One thing for sure, watch didn't work at all with new battery. I even hit the pivots with some quartz oil to see if I could decrease physical resistance. No luck. I guess I'm resigned at this point that it's going to need a retrofit. No telling at this point whether I was just kicking a dead horse, so to speak. But it is certainly a dead watch. Oh well. Thanks for all of the help, folks. Stay healthy out there.
  9. It's so scarce around here that I'm almost down to using watch paper. I'll be OK as long as my new cheese diet kicks in. But of course that may bring on other issues.
  10. Based on the 641 diagram, I checked the coil resistance at the noted test points. While it may not be open, it does show very high resistance. It is in the order of 3 million ohms. I started low on ranges and showed nothing until I got to the "M" scale. With spec at 9500 ohms and reading at 3 million ohms, I'd say there's a coil problem at the very least. No?
  11. Thanks, JohnR725. Those are great references. I have basically given up on cleaning the movement, as that PCB does indeed look like it as soldered at the posts rather than being clipped on. I'm going to run through the checks based on what you and AndyHull have supplied. I'll report back on any developments. Cheers.
  12. Yes, hard to say the sequence during manufacture. Maybe that's why GP won't work on these? De-soldering those joints seems like it would be a bit dangerous to the PCB and joint. They may indeed have put the PCB in position under those clips and then hit it with solder. Thanks again, AndyHull.
  13. OK, so here's what I was afraid of. There are these little clips that are part of the PCB. It looks like they are soldered to the PCB and use a "C" clip that slides horizontally around the post. If I'm not mistaken I have to somehow lever between the train-bridge and these clips to push them off the posts. I already have the two screws out that hold the PCB so it shouldn't have as much stress on the solders. That said, I'm sure that ideally you would push both clips off at the same time. Sorry about the focus. Both clips are sort of a dumbell shape, with one side open to clip onto the post. The one on the left is at a slightly different angle. Any suggestions? Thanks.
  14. Thanks, AndyHull. Is household rubbing alcohol sufficient, or do I need to get something else? I do have denatured alcohol and naptha here. I'm wondering if the denatured alcohol might break down the coatings on the PCB or other plastic components. Looking at the movement carefully under magnification I can see that this caliber wasn't made with serviceability in mind. The PCB isn't very stout. I'd best be careful removing it as I attempt to clean the watch. It will be interesting to see what lies beneath, under the PCB. We'll see if the signs of minimal battery leakage (No salting on the Union Carbide so it may have been before that was put in.) carry through under the PCB. I still have my fingers crossed that I can get the movement going with a clean and oil. Time will be told...or not. Cheers.
×
×
  • Create New...