Tektronix  4051

I had first used the Tektronix 4051 in 1978 while working with a company that was manufacturing memory and a 9 track tape system for the 4051.  I had managed to save some software, documentation, and diagnostic hardware for the 4051 but I didn’t have a 4051 until I found one a few years ago.   It was not functional when I received it but I was able to restore to full operation.   It had a shorted capacitor on the analog board that was blowing a fuse in the power supply.   It also damaged a transistor in the power supply (In electronics repair there is an adage that says “there is always a transistor that protects the fuse”).     I have added photos below of the circuit boards and the system in operation.  

 

I'm trying to start a 4051 / 4052 software archive.   I have some tape listings here.   If you have something to contribute please send me a copy at:

 

4051;  Docs:   ROMS

I also have several peripherals for the 405x series computers:

4924 Tape drive system;   DOCS:      ROMS  {manuals available, pending scan}

4907 File Manager (8" floppy drive system) ;  Docs:  ROMS

 4631 Hard Copy   

4662 Plotter  ROMS   {manuals available, pending scan}

4663 Plotter  ROMS  {manuals available, pending scan}

Note: some documentation provided is from bitsavers.org, and additional materials may be found there.

 

Memory board.    We were manufacturing a “clone” of this board at the company I work for in ’78.   I still have a few of the bare boards and some of the RAM.  I filled the empty sockets to get the full 48k.

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Back side of RAM board.

 

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Main board 

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 RAM board mounted on main board

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Analog control board

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Tape Drive board

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Power Supply

 

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Cover removed

 

 

System in operation

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Back of unit, ROM pack, backpack.

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