Reference Documents

Heathkit AD-1013 Audio Scope Schematic (0.8MB)

DEC M8650 Serial Interface Annotated Schematic with mods (1.6MB)

Eico 685 Transistor Tester schematic (0.5MB)

Eico 685 Transistor Tester Operating Manual (6.3MB)

Eico ST-84 Manual.pdf - searchable (6.5MB)

Carver patent 4,218,660 (1.6MB)

Carver patent 4,484,150 (2.1MB)

Pennywhistle 103 Modem Manual (9.5MB)