ABSTRACTS OF TECHNICAL ARTICLES 1265 



with Mylar film are likewise promising. As compared to mineral-oil-impreg- 

 nated paper capacitors, unimpregnated Mj'lar capacitors exhibit higher 

 dielectric strength, higher insulation resistance, and can be operated at 

 higher ambient temperatures. Their loss characteristics are comparable with 

 those of impregnated paper and the capacitance stability over the usual 

 range of ambient temperatures approaches that of mica capacitors. Mylar 

 is relatively nonhygroscopic and tests indicate that for moderate atmospheric 

 conditions capacitors made from it do not require additional moisture pro- 

 tection. The film can be metallized readily by current techniques and, when 

 used in metallized capacitors, appears to possess advantages over metallized 

 paper in several respects. 



Wright, S. B.^ 



Higher Frequencies for Ground-Air Communications, Air Univ. Quart. 

 Rev., 5, No. 4, pp. 60-70, 1952-1953. 



1 Bell Telephone Laboratories. 



