Jump to content

Search the Community

Showing results for 'accutron' in topics.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • WATCH REPAIR DISCUSSIONS, HELP & ADVICE
    • Watch Repairs Help & Advice
    • Your Walkthroughs and Techniques
    • Your Current Projects and Achievements
    • Tools & Equipment
  • WRT LOUNGE
    • WRT News & Announcements
    • Introduce Yourself Here
    • Your Watch Collection
    • Watch or Horology Related Videos
    • Chat About Watches & The Industry Here
    • Relax Zone: Chat About Anything Here
    • Help & Support With This Website
  • CLOCK CORNER
    • All Things Clocks
  • WATCH REPAIR TUTORIALS & INFORMATION
    • Watch Repair Course
    • Watch Parts and Tools Suppliers
    • Resources and Articles

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


ICQ


Yahoo


Jabber


Skype


Location


Interests

  1. I contacted a respected watch repairer to ask about repairing Bulova accutron tuning fork watches. The reply came back that parts were impossible to source so he couldn't help me. Does anyone on this form repair these watches. I have 2 that were working but now don't and I would prefer to pay for the repairs rather than go through the whole process of trying to learn how to do it myself. Life's too short to start another field, I just want to get to grips with mechanical watches. I started this thread because another member posted about receiving coils which were damaged in the post and it got me thinking.
  2. Recently I got an early 214 from 1963 that had a faulty coil. The coils on these are in two parts, a cell-coil and component coil, joined by three fine insulated single-core wires. The Cell coil had gone O/C due to water/battery leak rotting out the fine wires where they attach to the soldered binding-posts--Mainly because Bulova hadn't covered a small section of the wire with any protective varnish. A replacement cell-coil was bought from the guy in Bulgaria and the old one replaced on the coil assay. Fitting to the movement, it didn't run. It would go for about 5-10 seconds after plucking the fork, but the hum would slowly die away. I assumed the resistor and capacitor were messing round --so replaced these in the component coil side. Still the same. I checked the transistor--but it looked good in testing--I replaced it anyway, using a silicon device tacked in to test, altering the bias by changing the resistor from 3.9 meg to 2.2 meg, to accomodate the different bias requirements between a Silicon and the old Germanium device it was replacing and tried again. Exactly the same! I monitored the current using my home-made PSU, it would initially pin the meter and that would die away to 5uA, but the movement still not running and no hum either. Plucking the fork, it would run for 5-10 seconds, then the hum would die away, and no appreciable difference in current draw. The clue was the constant current it was drawing after the initial pulse. It was perfectly clear when I dragged the Scope out and checked. The coil set was oscillating at 200 odd KHz! When the fork was plucked, the 360Hz was modulating the 200KHz. I guess a Long-wave radio could have picked it up if it was close by! Fortunately,--Bulova had also run into this problem as well and on some coils added an extra capacitor to the component-coil to damp out the radio-frequency oscillations. A 0.01uF (1 Nanofarad, 1000pF) cap was installed at the point the wires from the cell-coil attach to the component-coil. Its placed between the leads of the drive coil (Red wire) and the feedback coil (Green wire). Doing likewise with an 0805 1nF SMD cap cured the issue completely and the movement runs normally, even self-starting--with lots of wires and components hanging out of it! I just now need to rebuild it all properly and neatly into the component-coil recess--Which should be fun!. I'm guessing that the inductance of certain Cell-coils must be just right to cause this oscillation so they added the extra cap on those causing troubles.
  3. Looking for a good cell-coil for a 214. original is a three-wire coil, but I can re-wire a two-wire cell coil into a three to work in place, if you have one going spare, maybe from a set with a duff component-coil. Thanks.
  4. Hi all , After not winning auctions on a few watches ,.. a similar model to this one , 2 Accutron Astronauts , 2 Omega SeaMasters , I pulled the trigger on this Beauty . It had a BIN price of $899,99 or make offer . I had been watching this watch for about a month along with about 20 or 30 other watchers . The date code N1 places it as a 1971 model . I made an offer that was accepted by the seller and now this Baby is on its way to me .
  5. Hi All , The postman delivered this Accutron 2180 today . In good condition and running smooth . The dial fades from dark blue to light blue . I installed a new Bulova strap I had and will install a new crystal soon . The date on the back says N3 , which translates to 1973 . Also on Craigslist here on Oahu , Hawaii I picked up this Tissot Visodate Heritage for an offer under $200 . I had been looking at them on the "Bay" , and at the local Auth. Dealer . I'm Stoked...
  6. Hi, Some of the first watches I worked on were accutron 214's and I have always liked them. Anyway a week or so ago I was searching the web and came across this one. It was described as humming but the hour and minute hands were hanging up as well as being 14kt gold. I decided to take a chance and put a $550.00 bid on it. It is turning into one of my favorites .
  7. After Geo started the time to hum topichttp://www.watchrepairtalk.com/topic/426-time-to-hum-again/?hl=accutron#entry2872 I had to have one! I brought this little number yesterday & it arrived this morning. these are a really pleasing watch, prices are VERY reasonable & there's loads of history available about them online & the buzz from the tuning folk is lovely to listen to. I'm amazed these aren't dearer to buy. Anyway mines a 1969 (year I was born) Accutron spaceview, with the Swiss 770 case, wide gray chapter rings & orange second hand. the wider chapter ring & orange second hand tie in with it being a later 1969 as they changed these details due to falling sales against the increasingly popular 218 models. also my case back is missing the mention of water resistance which was taken off later in the 1969 year so its quite easy to date. Lee
  8. Hi All . Well I finally got an Astronaut !! I had been searching for a while , and bidding once in a while , but just missing on closing the deal at the last seconds a couple of times . I had this one in my Ebay watch-list and decided to pay a little more for one that had just been serviced by a watchmaker that specializes in accutrons , in New York . I made an offer that the seller accepted . The seller lives in Virginia . When I got the watch I could not set the hands so I contacted the seller . He in turn contacted the watchmaker who said he guarantees his work , so send it to him and he would take care of the problem . The seller paid for the postage and $500 insurance to New York and the watchmaker paid for the postage to get the watch back to me . It was delivered today and runs great . I had a new crystal waiting for it and I Installed it this evening .... I'm stoked . The attachments are the sellers pics ....... The watchmaker installed an Accucell 1.35 volt battery , which is the original operating voltage for the Accutrons . The actual watch with new crystal and the watchband look much better than the pics .
  9. Hi guys, I'm having problems with starting up this watch, I've just replaced the battery & there's nothing happening, has anybody got any ideas! [emoji3] Sent from my iPhone using Tapatalk
  10. As these Manuals are in the Public Domain I thought I would upload them. Hope they may be of use. Vich Accutron 218 service manual2.pdf Accutron218ServiceManual.pdf
×
×
  • Create New...