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Manufactured by General
Electric, this Coolidge tube was used for diagnostic x-rays and is
a high vaccum tube. It measures 21 1/2" long and 7" in diameter. This tube
dates to around 1917 - 27, as the evacuation nipple is present. The purple
tint of the glass indicates the presence of potassium in the glass. The
anode is to the right and shows damage
from the electron beam. The cathode to
the left. The high voltage connection on the anode is somewhat unusual.
The electrical connection on the cathode is a srew-cap
type.
This tube was purchased in 1936 at the cost of $40.00. |
