ET-18-6 Memory Expansion board kit for Heathkit HERO 1 ET-18 robot with docs

Description

This is a brand new memory expansion board kit for the Heathkit HERO 1 robot.  It is the latest run of the ET-18-6 memory expansion board.  This is in full kit form that requires soldering.  Instructions on how to build the board as well as install it in the robot are included.  The kit includes all the parts required to build the board as well as the cables and hardware to install it in the robot.  This board mounts inside of the HERO 1 robot about the CPU board.  It runs the CPU at a slightly faster 4Mhz clock rate that is needed for the serial routines to work.  There are six 28-pin sockets on the board to accept additional memory or option ROM chips (available separately).  The standard configuration usually has the AutoMode ROM, Utility ROM, three 8K RAM chips, and the BASIC ROM.  A great way to expand your robot and a fun kit to build!  This would make an great addition to your vintage robot or computer collection!
Picture shows the kit contents but it also includes the assembly and installation documents.
Free shipping within the continental US.
Many other original HERO robot parts are on hand as well as upgrades.  If you need something just ask.  Also expert board level repairs for all the HERO robots using factory and custom test fixtures are available.