F/S HP 9830A system

The line votlage is not a problem, at least not with the HP parts of the system. HP machines of that date (and I know this applies to the 9830 and 9866 because I have both, and I have schematics of both [1]) typically had a mains transformer with 2 primary windings. One was a plain 120V winding, the other was a 120V winding tapped at 100 V. There were 2 slide switches on the back of the instrument, giving 4 possible input voltage settings : 240V : Both 120V windings in series 220V : the plain 120V winding in series with the 100V part of the other winding 120V : Both 120V windings in parallel 100V : The two 120V windings in parallel with mains input to the 100V section. That winding acts as an autotransformer, stepping up the mains to 120V for the other winding. There might be an issue with mains frequency if that mass memory unit is an 8" floppy drive. Such drives normally used synchronous motors, so the spindle speed was controled by the mains frequency. Well, it would probably be a small fraction of what the machine is worth, but even so, I couldn't even really afford the shipping costs, let alone actually paying for the machine. -tony