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ID number:  BIRRC-P0904
Institution:  Research and Cultural Collections
Named collection:  Historic Physics Collection
Title / Object name:  Cavity magnetron – commercial short wavelength model CV20
Object type:  Cavity magnetron
Date made:  Early 1940s
Materials:  Mainly copper and glass
Measurements:  Actual anode block 20 mm diam., 12 mm high with 12 cavities approx 1 mm diam. and 4 mm long. Mounted in larger block 3.8 cm diam. with 7 cooling fins 7.6 cm dia. Overall length 18.5 cm

Commercial magnetron for wavelengths of about 1 cm. Cut open to show internal structure. In the image the cathode lead and negative high voltage supply are on the left and the microwave output is on the right.

Inscriptions / Translations:  CV20 KB/S

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