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Author Topic: Orcon 1000b lamphouse causing buzzing Matthew Taylor Expert Film Handler Posts: 186 From: Essex, UK Registered: Mar 2004 posted 10-15-2006 01:52 PM                     My Orc 1000 seems to have started some significant buzzing sound in the sound system. The buzzing is only apparent whilst the lamp is on. My CP50 setup even picks up the buzz when I disconnect the sound lead totally, suggesting to me that maybe there's a noise suppression capacitor that has stopped working in the lamphouse. Would I be on the right lines with this theory?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 10-15-2006 03:00 PM                     Your ORC 1000 uses what is in effect a triac lamp dimmer circuit for the current control to the lamp as such it generates switching noise It can be induced or powerline born It is important that the lamphouse has a good ground connection as does the soundsystem Also put the lamp on a different phase of the panel as the soundsystem  |  IP: Logged Matthew Taylor Expert Film Handler Posts: 186 From: Essex, UK Registered: Mar 2004 posted 10-15-2006 04:58 PM                     We only have single phase electricity. Also, this problem has only started happening recently. Surely if it was the usual switching noise I would have had the problem before?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 10-15-2006 05:00 PM                     Check your grounding possibly a loose or corroded connection  |  IP: Logged Matthew Taylor Expert Film Handler Posts: 186 From: Essex, UK Registered: Mar 2004 posted 10-16-2006 11:04 AM                     Do you mean grounding inside the lamphouse?  |  IP: Logged

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