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Prewar Camera Tubes

For an excellent discussion of the difference between the first two television camera tubes, the iconoscope and the image dissector, please see this article by James O'Neal. Here is the early electronic camera gallery.

Monoscopes

The Monoscope on the Reverse Time Page website

Monoscope tube made by American Television Institute students (late 30s - early 40s). Usually there is a pattern of some sort on the target (right). This tube has a slotted disk instead. Here is the schematic diagram of the transmitter and receiver used with this tube.
RCA 1698 "Pattern" Monoscope (1939). This tube has numbers and geometric shapes in it.	DuMont Phasmajector (1938)
RCA 1846 Iconoscope with monosocope pattern (1942)	Experimental RCA Monoscope (ca 1938)
National Union Monotron (1938)
RCA 1699 Monoscope (1939). This tube was custom made with the TV station's test pattern and call sign. The museum has a pattern generator using this tube. Here is a lesson from United Television Laboratories about this tube.

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