Tube bases
A lot of different bases. For the not so common types an example is given. Most of them have defined names which is shown together with some size information.
Diam. means the circle on which the pins are (equally) spaced.
Spacing is the angle between the pins, some sockets have varying spacing.
 
2-pins 3-pins 4-pins
2p-3538.jpg (31804 byte)
Photocell 3538		 3-pin.jpg (12588 byte)
EA50		 b4.jpg (45193 byte)
European B4
5-pins
b5.jpg (48576 byte)
European B5		 p5.jpg (28402 byte)
P5
diam: 18,5 mm
spacing: x°		 UX5
diam: x mm
spacing: 60/90x°
5p-ba.jpg (39581 byte)
Siemens Bo		 5p-qb.jpg (66257 byte)
Philips QB3/200		 5p-qy.jpg (69084 byte)
Philips QY3-125
5p-rl.jpg (47395 byte)
Telefunken RL12P50		 - -
6-pins
  ux6.jpg (19174 byte)
UX6
diam: 19 mm
spacing: 60°		  
7-pins
b7g.jpg (19826 byte) 
B7G - Miniature
diam: 9,5 mm
spacing: 45°		 b7g-6me10.jpg (16442 byte)
B7G
6ME10		 ux7.jpg (45174 byte) 
UX7
diam: 21 mm
spacing: 51/52°
British 7p 7p-vidicon.jpg (19189 byte)
3/4" vidicon
diam: 10 mm
spacing: 45°		 7p-832.jpg (66959 byte)
832A
7p-ec.jpg (50484 byte)
Siemens Ec
 - -
8-pins
b8a.jpg (29131 byte)
B8A - Rimlock
diam: 11,5 mm
spacing: 45°		 b8g.jpg (38635 byte)
B8G - Locktal
diam: 18 mm
spacing: 45°		 octal.jpg (33935 byte)
Octal
diam: 19 mm
spacing: 45°
European Y8A
diam: 28 mm
spacing: 26,5°		 Subminiature
diam: 6 mm
spacing: 40°		 8p-vidicon.jpg (38465 byte)
1" Vidicon
diam: 16 mm
spacing: 40°
8 p8.jpg (36435 byte)
P8
diam: 30 mm
spacing: 30/54°		 w8.jpg (63697 byte)
RL12P50
9-pins
b9a.jpg (22220 byte)
B9A - Noval
diam: 12 mm
spacing: 36°		 b9d.jpg (35982 byte)
B9D - Magnoval
diam: x mm
spacing: 36°		 B9G 
diam: x mm
spacing: x°
Novar 9p-f2a11.jpg (40971 byte)
F2a11		 9

10-

pins
     

11-

pins
 11p-dg3-12.jpg (41876 byte)
DG3-12A
diam: 17 mm
spacing: 30°		 11p-o.jpg (46454 byte)
27M2		  
12-

 

dp12-compactron.jpg (36221 byte)
DP12 - Compactron
diam: x mm
spacing: x°		 b12b.jpg (58676 byte)
B12B
diam: 27,5 mm
spacing: 30°		  12p-spigot.jpg (53485 byte)
B12B with spigot
diam: 27,5 mm
spacing: 30°
13- pins
13-zm.jpg (38463 byte)
ZM1020 et al
diam: x mm
spacing: x°		    
14- pins
 diheptal.jpg (66687 byte)
pin 6 & 13 omitted
diam: 46 mm
spacing: 25,7°		 14-zm.jpg (33483 byte)
Display tubes
diam: x mm
spacing: x°		  
     
16-

pins
     
17-

pins
17-pand.jpg (39106 byte)
Pandicon ZM1200
diam: 18,3 mm
spacing: 20°		 17-b7971.jpg (61530 byte)
Nixie B7971 et al 
diam: 36 mm
spacing: 20°