AC Adapter

WendyL2@aol.com
XXX, 10 Nov 1994 04:55:05 -0400 (EDT)

Bought an AST Gridpad and an AC adapter from Radio Shack. I thought I was getting a specific adapter for the Tandy Zoomer but got a "universal" adapter. I figured out that the Gridpad is 4.5 volts but don't know whether it is positive or negative polarity. Anybody know?