IF transformer transistor radio in naming naming IF transformer

IF transformer naming method transistor radio (AM) in the IF transformer naming method consists of three parts: Part I: Lord said, with a few letters indicate the name,  Voltage stabilizer   uses. Part II: Dimensions, expressed numerically. Part III: serial number, use numerals. "1" indicates the first in the discharge frequency transformers, "2" represents the second IF amplifier circuit in the transformer; "3" and three in the IF amplifier circuit transformer models used in the primary,  mcb circuit breaker , the figures used dimensions significance would extend the scope of the standard to the power transformer and adds relevant content; right "pilot project" has been added, increasing the "state predictability pilot project", "diagnostic test projects," formed a "pilot project overhaul and requirements "chapter; this standard focuses on the state of maintenance, overhaul cycle weakens, only lists overhaul project. Overhaul in accordance with the actual situation, a selective manner; modify the original Appendix A, delete the original standard other appendices, an increase of Appendix B, Appendix C, Appendix D. Written format according to GB / T l. 1 r 600 and DL provisions plants were modified.