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				Triode 
				
				Introduced in 1927 
				
				  
				
				
					
						| 
						Vf | 
						
						Af | 
						
						Va | 
						
						Vg | 
						mAa | 
						ra | 
						
						gm | 
						
						Pdiss | 
					 
					
						| 4 | 
						1 | 
						250 | 
						-3.5 | 
						6 | 
						12,500 | 
						2.4 | 
						1.5 | 
					 
				 
				 
				
				
					
						| Equivalent | 
						10E/17, 164V, 244V, 5-424, 
						A4110, AG495, AL495, 
						AN4, DN254, Dn284, DW4011, I253, MH4, 
						K1694,  
						KL70504, 
						REN904,
						REN1104, RS4324, 
						T425, 
						VR37, W308, 
						W428, 
						WE27 | 
					 
				 
				 
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