|   | 
				 Output triode 
				
					
						| Vf | Af | Va | Vg | Ra | mAa | g | gm | Pout |  
						| 4 | 0.15 | 50-150 | -18 | 3,000 | 11 | 5 | 1.6 | 0.2 |  
					
						| Equivalent | 2-405, 2LO, 415XP, D5, DX502, G405, 
						L316, L414, LX414, M54, N406, P414, P415, PM254X, PM4X, R77, 
						RE114, RE124, RO4305, TB05, VT111,
						VT129 |  | 
					
						|  |  
						| 
				Advertisement for the B405 by Mathieu Clement, 
				1927 |  |