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3.8-inch hot cathode high vacuum X-ray tube

3.8-inch hot cathode high vacuum X-ray tube

Victor Electric Company
1920-1925
3 stage audio amplifier

3 stage audio amplifier

General Radio Company
4-inch heated cathode high vacuum x-ray tube

4-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1922
4-inch heated cathode high vacuum x-ray tube

4-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1925
4-inch heated cathode high vacuum x-ray tube

4-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1925
5-inch heated cathode high vacuum x-ray tube

5-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1925
7-inch heated cathode high vacuum x-ray tube

7-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1920
7-inch heated cathode high vacuum x-ray tube

7-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1916
7-inch heated cathode high vacuum x-ray tube

7-inch heated cathode high vacuum x-ray tube

Victor Electric Company
circa 1922
7-inch heated cathode high vacuum x-ray tube

7-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1916
7-inch heated cathode high vacuum x-ray tube

7-inch heated cathode high vacuum x-ray tube

Victor Electric Company
circa 1920
7-inch heated cathode high vacuum x-ray tube

7-inch heated cathode high vacuum x-ray tube

General Electric Company
circa 1920
/ 24

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