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Download this stock image: . The Bell System technical journal . .^^^^^ kwvvvC-. ( k ^ k t k k-rt Ik k k k k k k I.WVrr-.W l|l|l|l l|l|l|l| C, C,-INNER AND OUTER CATHODES S S II I. II ELECTRON STREAMS T -HELIX TERMINATION H -INPUT HELIX G -OUTPUT GAP Fig. 2—Representation of double-stream amplifier with gap output. have mean radii of 0.215 and 0.170 respectively and a wall thickness of0.030 in each case. The short sections of helix which are used for input and output are woundof 0.013 diameter molybdenum wire, 44 t.p.i., and mean diameter of 0.500.The axial velocity of signal propagation along this helix is equal to - 2CRTRY0 from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

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