Yaesu 800SDX & watches ?

Discussion in 'General Technical Questions and Answers' started by KD0CAC, Jun 3, 2016.

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  1. KD0CAC

    KD0CAC Ham Member QRZ Page

    Bought here a few days ago , with warning it may / or may not function , may need new connectors .
    Cleaned up the connectors , even used the last 4-5" of wire to connect to controller to test , seemed everything worked , except that it had a very short travel , about less than 1/4 turn & stop , would go both ways but stops at 1/4 turn .
    All functions , preset , speed , light works - just stops - the stop sounds like it locks up .
    Take apart and find there was epoxy inside at the center of the top cover .
    Look at the outside & part of the channel that guides the mast clamps was broke off , so they wanted to stop leaking with the epoxy .
    Now comes the clock part , the main drive gear - four layer plate gears , to the inside of top cover .
    Had one tooth broke off and one bent over to the next tooth .
    My guess is they did not get the timing correct when putting it back together from the epoxy repair , and the stop switch was being activated in the one direction - that broke & bent the teeth .
    Now again back to the watch part ;)
    I was talking to a couple of friends about making new gears [ they knew I no long had access to mill & lathe ,
    My reply was they were making watches long before they had mills & lathes .
    Emailed Yaesu after one day Yaesu emailed back they no longer had those parts , so I will be doing a little watch repair .
  2. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    The main reason to stick with Hy-Gain type rotators.:)

    They're super simple, rarely break, and if they do, spare parts are readily available all over the place.
  3. KD0CAC

    KD0CAC Ham Member QRZ Page

    On the other side of that , maybe start repairing Yaesu rotors , built is work ;)
    Wish I still had my shop , could make a lot of what is not available .
    When I get to a better internet connection , I'l have to load some pictures .
    I now have 2 rotors that were out of timing , one was operated , the one I am fixing now , the other was never operated - so will be ok , now that I have learned how to do the gear-timing-setup .
    Have to keep an eye out for Yaesu rotors / parts .
  4. KD0CAC

    KD0CAC Ham Member QRZ Page

    Here's some pictures ,
    Dang , downloaded from iphone to email and file is too big , so can not post ?
  5. WA7DU

    WA7DU Ham Member QRZ Page

    For the life of me, I do not understand why Yaesu will sell rotators in a market, then not support them with service and spare parts. I wonder what the sales are in other markets such as Asia, Austrailia, Europe, and the rest of the southern hemisphere. There is a break-even point somewhere, and a point somewhere up the Profit-Loss function where available capital is better used. Me like Yaesu radios, me no like Yaesu business plan.
  6. KD0CAC

    KD0CAC Ham Member QRZ Page

    Ya I've heard that before buying , but the 1st SDX came from a fellow club member with very little use and the computer control board new in box , for too good of a price .
    Then just got this 2nd one with issues , figured if nothing else , some spare parts , also at a ok price .
    But with a little bit of welding & cutting , I can repair the four layer gears and have a 2nd complete working unit .
    The only scary part is , that ham disease - I may have to keep looking for broken ones to fix , or parts ;)
  7. KD0CAC

    KD0CAC Ham Member QRZ Page

    Posting pictures , the 4 gears stack to make the main drive for rotor top - something bound it up and broke off one tooth and bent over the next , my intention is to use welder to fill in missing metal & grind / file the profile of the 2 missing teeth .
    So much for having spare parts , now a spare rotor .

    Attached Files:

  8. W9GB

    W9GB Ham Member QRZ Page

    SINCE you are likely dealing with METRIC Gears, here is one knowledge source.
    Elements of Metric Gear Technology
    Complete document (PDF)

    Small Parts (Florida), now a division of Amazon, formerly offered a wide variety of gears.
    There product catalog was reduced after Amazon's purchase.

    Here are "other sources" from my Rolodex.

    SDP/SI - Stock Drive Products / Sterling Instrument
    2101 Jericho Turnpike
    New Hyde Park, NY 11040
    Phone: (800) 819-8900 or (516) 328-3300

    SDP/SI : Gear documents
    Micro Fasteners (no gears, specialty nuts/bolts/etc.)
    Component Supply Company (no gears, speciality is tubing and plastics)
    Last edited: Jun 10, 2016
    KD0CAC likes this.
  9. KD0CAC

    KD0CAC Ham Member QRZ Page

    Oh dang , now you just bumped several projects up a few notches on the list of things to do .
    One of which is HP 8640 sig gen , the plastic gears that are known for shrinking & cracking on the shaft .
  10. W9GB

    W9GB Ham Member QRZ Page

    SDP/SI can handle all of those projects -- many with "off-shelf" gear (no custom required).

    You could easily create replacement gear sets (volume) and
    sell for both HP 8640 and Yaesu rotators.

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