Hi, What can I say... Thank you so much for sending the BIN files for the EPROM's, that was most kind of you. If you no longer have the 1631, then I take it that you do not need the grabbers. If you still require them, just send your address and I will post them off to you. I was given the HP1631D by a kind gentleman on the vintage radio forum. He had played around with it and re-written some of the EPROM's (bad move). I will program them up tonight and see what happens.... Thank you so much once again, if I can help you in any way in the future just let me know... Daniel.