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						 Double triode 
							
								| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  
								| a(2) | g(2) | k(2) | f | f | a(1) | g(1) | k(1) | fct |  Heater has central tap, 
						so it can be used for 6.3V operation. 
							
								| Vf | Af | Va | Vg | mAa | ra | gm | Pdiss |  
								| 12.6 | 0.15 | 250 | -2 | 1.2 | 62,500 | 1.6 | 1 |  
					
						| Equivalent | 12AD7, 12AX7, 12DF7, 12DT7, 12DM7, 
						5751, 
						6681, 7058, 7729, B339, CV4110,
						CV492,
						E83CC,
						ECC83, M8137 |  |