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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
I think I need to give some more info. The PA system that I am adding is a -24vdc system that uses a four wire setup:
1 -24vdc
2 Ground
3 Signal +
4 Signal -
The intercom system is a Nutone IMA-516
The existing horn is being used as a speaker and a mic depending on if the intercom is...
I am trying to installing an external amplifier onto a existing intercom system. When switching from the talk mode to the listen mode the unit uses the speakers as a microphone which is causing the system to feedback. I wanted to know if I installed a diode between the intercom and amp will that...
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