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Speaker termination

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nuckollsr(at)cox.net
Guest

Posted: Thu Feb 15, 2007 4:09 pm Post subject: Speaker termination

At 09:07 AM 2/15/2007 -0500, you wrote:



 	  Quote: 	
		  Hi Bob,

         I'm about to close up the front of my "9" and there is a pair of

wires coming from the Icom A200 for an external speaker.  Should I

terminate them with a resistor or just leave them open.  I do not intend

to utilize a speaker in the cockpit.


	


    Good for you. Refer to the instruction manual. If they

    don't call out a dummy load, you can just leave it open.

    Actually, the few radios I've see that called for a dummy

    load on unused outputs would probably have been quit

    stable without it.



    The only think I can think of that would prompt a designer

    to require loading an unused input is to accommodate

    an output stage instability under light loads. Modern

    audio amplifier ships don't have this problem.



    Bob . . .

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wrmaxwell(at)bigpond.com
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Posted: Fri Feb 16, 2007 5:42 pm Post subject: Speaker termination

You can safely leave the dummy load resistor out.



Bill

---

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