This is the straight 8 showing the frequency spectrum of the touch tone phone. The oscilloscope at top left is being used as XY monitor. If you zoom in you can just see the two frequency peaks. Below it is the AX08 Laboratory Peripheral which drives the scope, reads the control switches for the games, and has A/D converter. Below it is the DF32 disk drive. To right is the Straight 8 computer and ASR-33 Teletype.
The DMTF frequency chart is below the PDP-8.
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Feel free to contact me, David Gesswein djg@pdp8online.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with. I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation.
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