tube noise

tube noise

[′tüb ‚nȯiz]
(electronics)
Noise originating in a vacuum tube, such as that due to shot effect and thermal agitation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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For as long as the FOUR PRINCIPALS can convene meetings, have tea and talk, the rest is just TEST TUBE noise."