Wait, wait! Let me write this down! Hold on!
(scribble scribble)
; )

Smooth plates - the plate of the tube is smooth, rather than "ribbed"
black plates - the plate is black in color as compared to grey (black is
preferred to grey in most cases)
gray plates - the plate is grey in color as compared to black
short plates - the same tube - for example a Mullard ECC83 may have two
versions, one having shorter plates than the other
long plates - see short plate above
round getters - the getter(s) are shaped like the letter "O"
D getters - the getter(s) are shaped like the letter "D"


Bob H.

Just grab that plate in one hand, the chassis in the other,
and FEEL the power of tube audio!!!
(not literally, of course, just kidding. DON'T DO THAT!)