SPECTRA LOGIC S20 – Disk / Tape Controller

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This is a Spectra Logic – Spectra 20 controller which provides both SMD and Pertec interfaces via DG device emulation. 

I am very happy to finally get my hands back on one of these controllers as I used to repair this PCB and it’s ‘plus’ counterpart in my first paid job. 

This example is in reasonable condition considering it was salvaged from a second hand store! 

More on this PCB in due course once I have bench tested it (Need a Pertec Drive First!).