Vacuum tube pin connections

- information or data about pin connections for thermionic valves or vacuum tubes


Vacuum Tube / Thermionic Valves Includes:
Basics     How does a tube work     Vacuum tube electrodes     Diode valve / tube     Triode     Tetrode     Beam Tetrode     Pentode     Equivalents     Pin connections     Numbering systems     Valve sockets / bases    


Information or data about vacuum tube or thermionic valve pin connections is always useful to have to hand. With the wide variety of tubes that are in use there are many different configurations.

Pin connections were not easy to standardise because of the varying internal construction of the thermionic valves dependent upon their function and the variety of vacuum tube bases available. With single diodes, double diodes, triodes, double triodes, triode pentodes, and many more the variety of configurations and hence the requirements for pin outs is almost endless.

As a result the pin out configuration information for valves are particular to a given vacuum tube and data needs to be sought for each type used.

Image of a Mazda ECH81 triode heptode valve / tube, normally used as a mixer.

Information about a selection of some of the more commonly used vacuum tubes is given below:


Tube type Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9
AZ41 IC a'' IC IC IC a' f f --
DAF91 -f, g3 IC ad g2 a g1 +f -- --
DAF96 -f, g3 IC ad g2 a g1 +f -- --
DF91 -f, g3 a g2 IC -f, g3 g1 +f -- --
DF96 -f, g3 a g2 IC -f, g3 g1 +f -- --
DL92 -f a g1 g2 fct, g3 a +f -- --
DL94 -f a g2 NC fct, g3 g1 +f -- --
DL96 -f a g2 NC fct, g3 g1 +f -- --
EABC80 a'''d a''d k''d h h a'd k'''d, s g a
EB91 k' a'' h h k'' s a' -- --
ECC81 a'' g'' k'' h h a' g' k' hct
ECC82 a'' g'' k'' h h a' g' k' hct
ECC83 a'' g'' k'' h h a' g' k' hct
ECC84 k'' g'', s a'' h h g' k' k' a'
ECC85 a'' g'' k'' h h a' g' k' s
ECC88 a'' g'' k'' h h a' g' k' s
ECF80 at g1 g2 h h ap kp, s, g3 kt gt
ECF82 at g1 g2 h h ap kp, s, g3 kt gt
ECH81 g2, g4 g1 s, k, g5 h h ah g3 at gt
ECH83 g2, g4 g1 s, k, g5 h h ah g3 at gt
ECL80 at gt k, s h h ap g3 g2 g1
ECL82 gt kp, s, g3 g1 h h ap g2 kt at
ECL83 at gt kt h h ap kp, g3 g2 g1
ECL86 gt kt g2 h h ap kp, g3, s g1 at
EF80 k g1 k h h s a g2 g3
EF85 k g1 k h h s a g2 g3
EF86 g2 s k h h a s g3 g1
EF91 g1 k h h a g3, s g2 -- --
EF92 g1 k h h a g3, s g2 -- --
EF93 g1 g3, s h h a g2 k -- --
EF94 g1 g3, s h h a g2 k -- --
EF95 g1 k, g3, s h h a g2 k, g3, s -- --
EF97 g1 k, s h h a g2 g3 -- --
EF183 k g1 k h h s a g2 g3
EF184 k g1 k h h s a g2 g3
EH90 g1 k, g5 h h a g2, g4 g3 -- --
EK90 g1 k, g5 h h a g2, g4 g3 -- --
EL84 IC g1 k, g3 h h IC a IC g2
EL86 IC g1 k, g3 h h IC a IC g2
EL95 g1 k, g3 h h a g2 g1 -- --
EZ80 a' IC k h h IC a'' IC IC
EZ81 a' IC k h h IC a'' IC IC

Key
  a = anode
  f = filament
  g = grid - the suffix number indicates which grid
  h = heater
  IC = internally connected
  k = cathode

If a second letter is present it indicates the section of the valve where the element is present in a multi section valve, i.e. ap is the anode of the pentode section of the valve. Where two similar sections are present, e.g. in a valve where two diodes are present then a' indicates the anode for the first section and a'' indicates the anode for the second section.

This list is offered in good faith, no liability can be accepted for errors.

Image of 6L6 beam tetrode with a glass envelope



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