<I've got two complete H-11 systems but have not yet got them running. Back <burner project setting with all the others. Should get to them I guess so' <I could help several here who have them. I could look up stuff if either o <you need info. Seems Allison has had one for years that she hotrodded with <a better CPU, etc. Thats mroe or less true. Got rid of that box many years ago and am collecting the heath bits to make another. I have many Qbus 11s though and the heath is just another qbus 11 of less substantial design. I happen to like the h11-5 serial board, if DLV11-F or F similar and can be set up for current loop or rs232/423 with or without modem controls. I'm still using one to support a LA100 using the RT-11 LS driver, works very good @9600 baud. Allison