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				HF pentode Introduced 
				in 1933 
					
						| 1 | 2 | 3 | 4 | 5 | top | base |  
						| g2 | f | f | g1 | k,m | a | B5 |    
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | ra | gm | Pdiss |  
						| 4 | 1.1 | 200 | 100 | -2 | 3 | 1.1 | 2,000,000 | 2.3 | 1.5 |    
							
								| Equivalent | 5-447, AF2, AS4100, 
								DH204,
								E447, HP4105, 
								HP4106, 
								KL70701S, MT4110, 
								MVSPen, RENS1294, 
								RS4347, T4700, TE47, 
								TF2, VMP4, VP4, W519,
								WE25 |  |  |  |  |