The term "565X" also appears as a partial identifier in professional literature:
: These components were standard in DIY electronics kits and repairs for controlling voltage within circuits. The term "565X" also appears as a partial
: While no longer in active production by Radio Shack, these "565X" parts are often found today in the "Excellent (C-7)" condition category on specialty hobbyist and parts sites like Trainz . Academic and Technical Identifiers The term "565X" also appears as a partial