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				HF pentode 
				Introduced in 1936 
				
					
						| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc |  
						| m | f | a | g2 | g3 | - | f | k | g1 |  
				  
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | ra | gm | Pdiss |  
						| 6.3 | 0.3 | 250 | 125 | -3 | 10.5 | 2.6 | 600,000 | 1.65 | 2.75 |    
					
						| Equivalent | 5732, 6M7, 6U7, 
						ARP34, 
						BVA246, CV1195, CV1941, CV1053, CV1942, CV1943, CV706,
						EF39, 
						OM6, VR53, VT85, VT86,
						VT180, W63 |  |  |  |