On 03/30/2013 07:45 AM, Brett Bump wrote: You need a VT55. Good luck finding thermal paper for it though. ;-) We bought 2 new (old stock) VT55's in the early 80s. They were kind of fun for graphs, but not worth what the school paid for them. I'd love to have one of those. They're all pretty much gone at this point, unfortunately. The few that remain aren't able to be pried out of their owners' hands. (and I don't blame them one bit!) -Dave -- Dave McGuire, AK4HZ New Kensington, PA