This paper deals with a study conducted on a low noise fluorescent lamp with the so-called “an enlarged coil cuthode” in which the major coil diameter as well as the pitoh of a coiled coil cathode are made larger than usual, also accounting for its effect of noise suppression in conneotion with many experimental results.
On the other hand, “the enlarged coil cathode” has been discussed about its noise suppression mechanism. Again the basic criteria of noise level have been obtained for designing this type of cathode.
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