Editing 6SN7 (section)

==Successors to the 6SN7 ==
The 1954 '''6CG7'''<ref>{{cite web|title=6CG7|url=http://www.radiomuseum.org/tubes/tube_6cg7.html|access-date=10 June 2014}}</ref> and '''6FQ7''' are electrically equivalent to the 6SN7, with [[Tube socket#Noval base|nine-pin miniature ("Noval")]] base (RCA, 1951), also made as an 8.4V 450mA series string heater type as the '''8CG7'''.

In contrast to what some sources claim, the '''ECC40''' with [[Tube socket#Rimlock base|Rimlock base]] and introduced by Philips in 1948 cannot be considered a successor to the 6SN7<ref>{{cite web|title=ECC40|url=http://www.radiomuseum.org/tubes/tube_ecc40.html|access-date=10 June 2014}}</ref> as the electrical characteristics are too different.

The 1946 miniature [[12AU7]]/'''ECC82''', with similar, but not identical, electrical characteristics to the 6SN7 and ECC32, and a filament usable on either 6.3V or 12.6V supplies, is more widely used than the 6CG7/6FQ7.