This standard applies to the quality classification of Class A tuning variable capacitors with integral Class C pre-adjusted capacitors in film dielectrics. This standard only gives some test items and technical indicators and must be used together with GB 6252, GB 11301 and related detailed specifications.
SJ/T 9551.2-1993 history
1993SJ/T 9551.2-1993 Type C film dielectric variable preset capacitors--Quality grading standard