Narf Posted March 9, 2006 Share Posted March 9, 2006 Hi, Just a quick question, I’ve had a few lamps (CP43’s) go over the past few days on the show I’m currently working on, They have all come from two Cadenza PC’s (which are well maintained), We have changed the dimmers on the units in question and also checked the wiring to each of the Cadenza’s. The lamps have all blown in the same way with the Start and End of the filament (the outside coils) been blown off and a burn mark on the inside of the quartz. Does anyone have any ideas on why this may be happening or where I can find some other information from???? Fran Link to comment Share on other sites More sharing options...
Jivemaster Posted March 9, 2006 Share Posted March 9, 2006 Two things cause premature failure in my experience, no-brand lamps and burnt holders. Lamps run so close to their destruction temperature that they rely on cooling through the pins and holder. -If the contacts are burnt the contact actually generates heat and this kills lamps. Link to comment Share on other sites More sharing options...
Narf Posted March 9, 2006 Author Share Posted March 9, 2006 Hi, The Lamps are well maintained, and the lamp bases are also fine, that was the first thing we checked, also they are GE Showbiz lamps, so not cheap unbranded ones, Any other ideas anyone??? Link to comment Share on other sites More sharing options...
paulears Posted March 9, 2006 Share Posted March 9, 2006 230 or 240 volt versions? Link to comment Share on other sites More sharing options...
gareth Posted March 9, 2006 Share Posted March 9, 2006 Meter the voltage that's coming out of the socket feeding the lamp - it might be a bit high. If it's right at the upper end of the standard tolerance for mains voltage (230v + 10%), and remains so for more than a short time, you might need to talk to the electricity board. Too high a voltage would certainly cause lamp life problems. Another possibility is that it's just a bad batch of lamps. These things do happen from time to time - if the pinch at the base of the glass isn't sealing properly, or something like that. Save all the lamps, and send them back to GE with a suggestion that perhaps you've got some duff ones. Link to comment Share on other sites More sharing options...
strand600X Posted March 10, 2006 Share Posted March 10, 2006 We had a problem with T19's a short while ago and it was just a bad batch of lamps if you have a new "box" then I would try themBaz Link to comment Share on other sites More sharing options...
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