Strange Pop????

Discussion in 'Lighting and Hardware' started by smoke665, Sep 22, 2019.

  1. smoke665

    smoke665 TPF Supporters Supporting Member

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    Had an episode the other day. I had an AB800 and 2 AB400's hooked to a power strip with switch. Never had any issues with this, have actually run up to 6 lights before. Generally though I turn off the lights at the switch on the lights, and then turn off the switch. The receivers for the Cyber Commander plug inline so, to actually turn them off I need to kill the power. Anyhow the other day I forgot and left the lights on, and just hit the off switch on the power strip. The other morning, came in, hit the power strip switch, and thought someone shot me, there was a really loud POP. No smoke anywhere, nothing appears harmed, all the flash tubes are good, all the modeling lights work and the Cyber Commander works. I've used them 2 or 3 times since without issue (though I remember to turn the lights off so they don't all come on when I hit the main power switch). Anyone ever encountered this????? It's got me skittish now. LOL


     
  2. Designer

    Designer Been spending a lot of time on here!

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    Once I had an old speedlight pop, and it was toast.
     
  3. smoke665

    smoke665 TPF Supporters Supporting Member

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    First thought a flash tube had blown or a capacitor but nothing appears to be harmed. No burnt electrical smell either.
     
  4. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    Do your lights automatically discharge when you power them down?
     
  5. smoke665

    smoke665 TPF Supporters Supporting Member

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    They do when you hit the switch on the light, but not sure if they do when you kill the power.
     
  6. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    I'm guessing what may have happened is that by turning the power off at the power bar, rather that at the light, when you powered it back up again, the condenser tried to dump while it was charging. If you din't blow the capacitor, Id' say all is good, but I'd recommend against doing that in the future.
     
  7. Derrel

    Derrel Mr. Rain Cloud

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    I would suggest turning off the lights at their own power switch individually, rather than turning off the power at the power switch.

    John might be right, that the flash units tried to dump the capacitors at the same time they were charging. Not all flash units dump their storage charge when switched off, but quite a few do

    nobody likes to hear a mysterious pop!
     
  8. smoke665

    smoke665 TPF Supporters Supporting Member

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    Considering I almost had an accident in my pants, when it popped, I'm pretty sure it will be a long time before I forget to turn them off before I kill the power again. When you get to be my age, those kind of surprises aren't healthy!!!:aiwebs_016::aiwebs_016::aiwebs_016:
     
  9. compur

    compur Been spending a lot of time on here!

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    Some power strips have surge suppressor circuitry in them. If that is the case with your strip, then when you turned it on with all flash units on there likely was a surge and you may have blown a component in that circuitry such as an MOV.

    And, if that is what happened, your strip may still seem to work but it may not protect your gear from future spikes.
     
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  10. smoke665

    smoke665 TPF Supporters Supporting Member

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    I wondered if the pop I heard might have come from it, because it sounded like I was right on top of the noise. Like someone lit a firecracker under me. :aiwebs_016: I may just trash that one. I've got several anyhow.
     
  11. Original katomi

    Original katomi TPF Supporters Supporting Member

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    For the cost of a new one it could be worth saving UR expensive lights
     
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  12. RVT1K

    RVT1K No longer a newbie, moving up!

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    It's a long story but while working on a radar system, someone did what they were not supposed to do (we had safety interlocks disabled due to troubleshooting).

    When the wrong switch was thrown, it sounded like an M-80 went off in the enclosure we were working in. I remember that a big, wire-wound power resistor blew its guts all over.
     
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