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작성일 : 03-05-31 00:25
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[파라피드300B/SE] 웨스턴 일렉트릭에 물어본 WE300B관의 파란불빛...(도깨비불?)
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글쓴이 :
모찌
 조회 : 2,265
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일전에 꼼방에 오시는 분중에서 WE구관에선 보이지 않던 신관의
파란불빛에 대한 이야길 들은 적이 있읍니다.
개인적으로 궁금하였고 공장이전에 때른 재생산이 언제쯤 이루어지는지
물어봣엇읍니다. 재생산 시점은 6월말로 보고 있답니다.
그리고 관내부의 현상에대하여는 아래와 같은 답을 보내왓습니다.
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A blue glow may appear in the dome of the WE300B just below the upper mica and the top edge of the plate. The space between the plate and glass is small at this point (less than 1/8 in.) and appears to be the only area of the tube where this phenomenon takes place. The glow is caused by the electrons striking the plate, volatizing the surface, and dislodging atoms of nickel. High-speed barium-strontium electrons from the filament collide with the atom, tearing off electrons, ionizing them and causing a deep blue color even in a well-evacuated tube. The glow is a function of the plate voltage and the number of gas molecules in the envelope. In a good vacuum there are still billions of molecules. The electrons do not cause trouble because they all return to the positively charged plate. The size of the glow also varies with plate voltage and is not the same for each tube: it can vary from not discernable to very obvious even in daylight. It does not affect tube performance as can be shown by observing the characteristic curves during tube operation.
Dangerous levels of gas will ionize throughout the entire bulb from a high voltage spark. It is pink in color and will cause variations in plate current. Air in the tube will ionize in a similar manner i.e. throughout the entire bulb, but will be more blue than pink. It will oxidize the filament and cause the emission to drop dramatically.
Westrex Corporation
PO Box 52455
Atlanta, GA 30355
404-352-2000 x221
fax 404-352-2222
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=:-)
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