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							| SP13 | SP13B/SP13C |  Pentode for series feed Introduced in 1934, SP13C: 1035 
					
						| SP13 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc | base |  
						|  | m | f | f | k | g3 | - | g2 | a | g1 | P |    
					
						| SP13B SP13C | 1 | 2 | 3 | 4 | 5 | 6 | 7 | tc | base |  
						|  | m | a | g3 | f | f | k | g2 | g1 | B7 |    
				
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | ra | gm | Pdiss |  
						| 13 | 0.2 | 200 | 100 | -2 | 3 | 1.1 | 2,000,000 | 2.1 | 1 |  |