Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,271   Posts: 1,534,471   Online: 1128
      
Results 1 to 3 of 3
  1. #1

    Join Date
    Jan 2007
    Shooter
    Large Format
    Posts
    284

    x-sync flash only works on bulb

    My Sputnik has developed a problem. The x-sync has started acting odd. Occasionally it will actually fire the flash when the shutter trips. Most often, it doesn't. I've tested it on a flash (Rollei E36RE) and flashbulbs. Same result.

    If I set the shutter to bulb, the flash fires every time. But, on 1/15, 1/30, 1/60, 1/125th, etc, it doesn't trip. The odd thing is that on the flashgun, I can see the ready light flicker when the shutter fires. If I open up the lens to watch the action, I can see the arm make contact with the x-sync post, spark, and then pull away. Since it is sparking (and the flash ready light flickers), I know it is making contact.

    Why doesn't it fire? How can I fix it?

    I've tried contact cleaner on all surfaces as well as a bit of abrasion to improve the contact surfaces. No luck so far.

  2. #2

    Join Date
    Jan 2006
    Shooter
    Multi Format
    Posts
    1,730
    Could it be that the resistance of the circuit has grown stronger with age and corrosion and that the B setting allows enough current to pass to trip the flash, while the momentary contact simply will not allow enough "juice" to flow?

    Not being familiar with the contacting surfaces, I'd ask if there might be a way to put a light dab of silver soldier on the tips of the connections? If not, maybe some conducting enhancement fluid of some sort?

    Also, I'd try to trace the entire path of the flash circuit and look for corrosion.

    Just a guess...

  3. #3

    Join Date
    Apr 2004
    Location
    Montgomery, Il/USA
    Shooter
    Multi Format
    Posts
    5,042
    Can you increase the pressure on the contacts? It may be that the contact isn't solid enough to firmly close the switch during the timed speeds. (switch bounce)
    Heavily sedated for your protection.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin