Early Coolidge tube housing which consists of a cylindrical bakelite tube with open ends; the ends are made of metal (one is chrome-plated); the centre of the tube has a ridge chromed metal section with a round opening which has red glass at the bottom and allows the centre of the tube to be seen.
Early Coolidge tube housing which consists of a cylindrical bakelite tube with open ends; the ends are made of metal (one is chrome-plated); the centre of the tube has a ridge chromed metal section with a round opening which has red glass at the bottom and allows the centre of the tube to be seen.
Centre of the tube housing has maker's marks - "1 [inside circle]" G.E. symbol and the words "Coolidge Tube"; the other mark is Victor symbol and the words "Made in U.S.A."
Permanent Location
Storage Room 0010
0010-F4-10
Dimension Notes
Length: 46.0 cm. x Width: 8.6 cm.
Condition Remarks
Tube was dirty and dusty; the chrome sections show some wear
Copy Type
Original
Reference Types
Person
Book
Reference Comments
Nancy Chisholm; Bernie Ziomkiewicz; "The Trail of the Invisible Light" by E.R.N. Grigg, M.D.