|  | 
			
				| 
			
				|   | 
				 Output pentode Introduced 
				in 1929 
				
					
						| 1 | 2 | 3 | 4 | 5/sc | base |  
						| f | a | f | g1 | g2 | B4/B5 |    
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | ra | gm | Pout | Pdiss |  
						| 4 | 0.15 | 250 | 150 | -19 | 12 | 3 | 45,000 | 1.3 | 3 | 0.6 |    
					
						| Equivalent | 2-443,
						B443, D100, 
						DX3, L43, L415D, L506, M704, M1004, PM24,
						PP415,
								R79, RO4243, 
						TU415, W443 |    |  |  |