24. The 400 Mc./s. flux from Cassiopeia A
1957 ◽
Vol 4
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pp. 154-154
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The first trial of equipment designed for 400 Mc./s. absolute flux density measurement was completed just prior to this symposium. Using the midday sun, the gain of a 7·5 metre Würzburg (equipped with a TE°11 circular wave-guide feed) was found by comparison with an ‘optimum’ pyramidal horn of 20·2 square wave-lengths aperture. Cable losses and signal powers were measured against the available noise power from two co-axial resistors, one at ambient temperature and the other stabilized at the boiling-point of pure nitrogen.
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2014 ◽
Vol 59
(17)
◽
pp. 4827-4844
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2013 ◽
Vol 811
◽
pp. 347-352
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1963 ◽
Vol 5
(3)
◽
pp. 190-194
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