This was the original AVT (Amiga Video Terminal) I designed before AEA commissioned me to do a more capable version (here) for them.|
This model did audio (AFSK) A/D in such a way as to be optimized for SSTV. It connected to the Amiga's parallel port. It required an external 8 VDC to 12 VDC power source.
Everything was done directly in hardware in this design, there was no CPU on board. I designed the PCB in Boardmaster.
The elimination of the IC part numbers was pure paranoia on my part. I laugh at myself today about it.
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