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> electronics help with devere 504 dicromat |
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#1
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electronics help with devere 504 dicromat
hi
i have a problem with my devere 504 mk iv and 250w trans tan it keeps blowing bulbs not all the time but slot more than it used to measuring the voltage across the lss as mp its 28v which seems a bit high for a 24v lamp but it might be just how they made them can any of you electrically able people check the voltage across your lamp Also if anybody has a circuit diagram for the transtab 250 that would be amazing best robin |
#2
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Not got the same equipment, but would expect worse case scenario of +/- 10% of design frequency. More like +/- 5%. Off load that is. With bulb running then near spot on...
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#3
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A few years ago I had quick bulb failures and like you checked the voltage at the input in the Mk 4 head. Mine was 28V too. I cleaned up the pins on the lamp and also the sockets in the connector. Since then I have not had any problems. Also the quality of the lamps can alter the life. I was using lamps sold for disco lighting. Since then I have changed to known make lamps such as Osram or Philips and they seem to last better.
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#4
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thanks for the reply’s
I’ll try cleaning up the pins and holder and see if that improves things I use the Osram bulbs - i got a box of 12 15 years ago but have only changed twice till lockdown and have been thru 6 ! best robin |
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