John, The broan intercom is manufactured today by a company call Nutone. They can be reached directly. The website is www.nutone.com. If they cannot help you you can call a nutone service center which they should be able to refer you to a company. You can also call two companies that repair Broan (Nutone) systems. They are either S & K Electronics www.skelectronics.com or All Electronics www.allelectronicsrepair.com . You are welcome to e-mail or call if you have further questions. Robert Pinell IntraSonic Technology, Inc. www.intrasonictechnology.com

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