抄録
(1) To make resistance tubes of extremely low voltage coefficient Kυ and of satisfactory characteristics the authors found the parallel filament type most suitable, where Kυ is a coefficient in the formula V=KυI1.85.
And also it was found that series type is most suitable to make tubes having extremely high Kυ.
(2) To design resistance tubes of Kυ of desired value, the relation between Kυ and filament size w (M. G.) and filament length l was investigated. In consequence the next formula was obtained.
Kυ=22.3(l-5)w-1.676
