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Just put my panel back in after transponder repair. Now I hear a 
		
	
		
		
		
		
		
	
		 
		
	
	
	significant noise in the headset when pressing the mic-tx button - seems like ignition but sometimes white noise. Same thing from both radios and either Pilot/Copilot headsets. Have a RST-564 Audio Panel and dual LightSpeed Plasma II ignition - the ignition grounding checks out OK. --------------------------------------- SQ2000 http://www.abri.com/sq2000  | 
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