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				| 
			
				|   | 
				 
				Tetrode 
				Introduced in 1933 
				
					
						| 1 | 2 | 3 | 4 | 5 | tc | base |  
						| g2 | f | f | g1 | k | a | B5 |    
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | ra | gm | Pdiss |  
						| 4 | 1.1 | 200 | 100 | -1.5..-40 | 3..0.1 | 0.8 | 350,000 | 2 | 1.5 |    
					
						| Equivalent | AS4125, 
						DN5004, DW8, E455, H4115D, MM4V, 
						MV4110, MVSG,
						RENS1214, RS4345, T4500C,
						VMS4B, W419, W455 |  |  |  |