My Thomas Duplex hums...loudly.

Discussion in 'Darkroom Equipment' started by jstraw, Oct 28, 2006.

  1. jstraw

    jstraw Member

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    Do they all do this? Is it a symptom of a problem?
     
  2. Gay Larson

    Gay Larson Member

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    mine doesn't hum, that all I have to compare.
     
  3. mikebarger

    mikebarger Subscriber

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    Mine has a slight hum to it
     
  4. blaze-on

    blaze-on Member

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    Mine hummed...then light flickered. I was informed it is probably a bad bulb..I haven't replaced yet to confirm though.
     
  5. dphphoto

    dphphoto Member

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    I used to work in "pro" labs, and have been around any number of these things. They all hum, but some more than others. The one I have now hums, but not enough that I can't drown it out with the stereo. Dean
     
  6. jstraw

    jstraw Member

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    Thanks, folks. I'm not going to sweat it.
     
  7. Black Dog

    Black Dog Member

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    Any particular tune? or is it all modern classical LOL?
     
  8. Jeffrey A. Steinberg

    Jeffrey A. Steinberg Member

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    a loud humm means the ballast in the starter is going. It can be replaced. A low level hum is just the voltage going through the tube.

    --Jeffrey