Could you elaborate a little on sources of interference and ideal positioning of components relative to each other?  Since the problem is intermittent, trial and error could be a very lengthy process.  Especially if I don't know what exactly I'm looking for. 
 
Thanks for the quick response! 
		
	
		
		
		
		
		
	
		
			
			
			
			
			
			
			
			
			
				
			
			
		 
		
	
	
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