| Standard ID | SJ 1121-1976 (SJ1121-1976) |
| Description (Translated English) | Electronic tubes, Type FU-7 (J) |
| Sector / Industry | Electronics Industry Standard |
| Classification of Chinese Standard | L36 |
| Word Count Estimation | 10,137 |
| Date of Issue | 1976/11/25 |
| Date of Implementation | 1977/10/1 |
| Regulation (derived from) | Industry-Science (2010) No. 77 |
| Summary | This standard applies to FU-7 type of tube. Next to the piping hot oxide cathode beam shot quadrupole power bulb launch tube. And national economic sectors of radio equipment, food products for high-frequency power in the general defense amplification, frequency, and amplitude oscillations with. |