MULLARD Transmitting Triode VO/250
              Triode d'émission
              Sendetriode
              PAT. APPN. 27599/21. PATENT No. 158720.
              No information available.
			  • 
			  A paper published in 1925 in The Engineer, which mentions the patent #158720.
			   
			  
			  Hauteur • Height • Höhe : 30,5 cm • 1'
			  Diamètre • Diameter • Durchmesser : 10 cm • 3" 9/10
			  
			  
               
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