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Manufacturing a 14AP4 Picture Tube

 

These pictures and text appeared in magazine articles in 1939

 

Blowing the bulbs by hand

Trimming excess phosphor from sides of 14AP4 picture tube

 

Inspecting the tube for defects

The steps in making the electron Gun

 

Installing the gun

 

Fusing the gun to the tube

 

Sealing off the tube after heating and evacuating

 

RF heating of the getter

 

Pressure testing the completed tube

 

 

 Here are some more detailed photos (courtesy of Mike Schultz)

The gun attached to the stem

 

RF heating of the getter