|  | 
				  
				 Double transmitting triode Introduced in 1938 
				(VT61A has different filament and base) 
					
						| 1 | 2 | 3 | 4 | 5 | 6 | 7 | tc1 | tc2 | base |  
						| f | nc | g(2) | k | g(1) | nc | f | a(2) | a(1) | U7B |    
					
						| Vf | Af | Va | Vg | mAa | Pdriv | Pdiss | Pout | Freq |  
						| 6.3 | 0.8 | 300 | -50 | 80 | 2 | 5 | 15.9 | 50-250 mHz |    
							
								| Equivalent | 10E/11442, CV18, CV1061 |      |