MicroVAX II Console Garbling Characters

Actually, since connecting terminal and machine to the same wall socket, the garbling seems to have much reduced, but I do get lots of dropped characters all the same. For example the prompt to enter date and time appeared without the final colon. I then pressed CTRL-R to repeat it and it just typed "PLEASE", with no further characters, but it then echoed the date and time as I entered it. Like I said, it seems to be able to send a certain number of characters and then loses the rest. I saw the cab kit comment, and I also wonder about that too. I am pretty sure the terminal is OK though, because it seems to work OK on other machines and I had exactly the same problems when using a DECserver 90M and Putty (so no terminal at all). I can try swapping some parts around to see if or when the problem goes away. I suppose I was just hoping someone might have seen similar problems, but I can do some deeper analysis to narrow it down more. Regards Rob