I have actually two of these ModelM keyboards, they are a pleasure to use and make a fantastic sound. The other one is from the 90s, takes a small PS2 adapter and works without a problem.
This one however worked fine for a while then it started to sometimes wildly type random characters, which of course makes it mainly unusable. It does not always do it and tends to take some input between the randomness. This is the keyboard and its adapter:
If anyone has any ideas of what else might cause the intermittent lapses into random characters please say, otherwise I'd like to get the cable replaced. Thing is, I'm not sure how to describe it and if such a cable can be ordered or made to order, as nowadays I don't have a soldering iron and am a bit out of the habit of that kind of DIY.
...and a closup of the holes:
Secondly, how would one describe such a cable in words and is it possible to obtain one anywhere nowadays?