Tube / Valve comparison chart

12AT7 = ECC81 = CV4024 = M8162 = 6201 = 6060 = B309 = CV455 = 6679
12AU7 = ECC82 = CV4003 = M8136 = 5814 = 6189 = B329 = CV491 = 5963
12AX7 = ECC83 = CV4004 = M8137 = 6057 = 5751 = B339 = CV492  
6DJ8 = ECC88 = 12AY7 = 6072  
6CG7 = 6FQ7  
 
6SL7GT = ECC35 = CV1985 = 6188 = 5691 = VT229  
6SN7 = 5692 = ECC32 = VT231  
 
CV378 = CV729 = GZ37 = 5AR4 = GZ34  
CV575 = 5U4G = 5AS45931 = VT244 = 274A  
5R4 = 5R4GY = 5R4GYAGF = 5R4WJAN  
 
6BQ5 = EL84 = 7189A  
6550 = KT88  
EL34 = KT77 = 6CA7  
KT66 = 7581 = 6SL6 = 5881  
 
300B = 6300B  
2A3  
 
211 = VT4C  
845