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				 Pentode Introduced in 
				1933 
				
					
						| 1 | 2 | 3 | 4 | 5 | top | base |  
						| f | g2 | f | g1 | k,g3 | a | B5 |    
				
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | Ri | gm | Pdiss |  
						| 4 | 1.1 | 200 | 100 | -2 | 4.25 | 1.8 | 1,400,000 | 2.5 | 1.5 |    
					
						| Equivalent | 5-447, AF2, AS4100, 
						DH204,
						E447,
						H4129D, HP4105, 
						HP4106, 
						KL70701S, MT4110,
						MVSPen,
						RENS1294, 
						RS4347, T4700, 
						TE47, TF2, VP4, VMP4, W519 |  
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