Vacuum Tubes
Glass tube containing electronic components that has all or most of the gases evacuated , used to observe the affects of current passing though it.
                                            
  	  
	  
          
      
  
            
        Sort by:
  
  
      
	  
    
   
		 
					 
					 
					 
					 
					 
					 
					 
					 
					 
					 
					