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				 Tetrode, selectode Introduced in 
				1932 
					
						| 1 | 2 | 3 | 4 | 5 | tc | base |  
						| g2 | f | f | g1 | k,m | a | B5 |    
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | Ra | gm | Pdiss |  
						| 4 | 1 | 200 | 100 | -1,5..-40 | 3/0.01 | 0.8 | 35,000 | 2 | 1.5 |    
					
						| Equivalent | 5-455, AS4125, DN5004, DW8, H4115D, 
						MM4V, MV4110, MVSG, RENS1214, 
						RENS1274, RS4345, T4500C, TE55, 
						VMS4B, W419, W455 |  |  |  |