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				Triode 
				Introduced in 1930 
					
						
							| 1 | 2 | 3 | 4 | 5 | base |  
							| f | a | f | g | k | B5 |    
					
						| Vf | Af | Va | Vg | mAa | ra | gm | Pdiss |  
						| 4 | 1 | 175 | -2.5 | 5 | 11,100 | 3.6 | 4 |  
					
						| Equivalent | 354V, 41MHF, 41MTL, 
						4GPAC, A4110, 
						AC/HL, AG495, 
						AN4, AR17, CV1037, CV399, 
						D4, Dn284, DW4011,
						E424, HL4,
						HLA2,
						K1694, 
						
						KL70504, NR31,
						REN904, RS4324, RV4100, TE24, 
						T425, TL415, VR37, 
						VT90, 
						WE27 |  |  |  |