I have an interesting problem with a Yamaha C7 c 1980. Nickel pins. There is one pin in which I can't get the becket to not slip and be pulled through the pin. Interestingly I've tuned this piano many times. At this most recent tuning I was going over the tuning and noticed that one unison (high treble) had slipped considerably. My first thought was that I had for skipped it somehow in my sequence. But as I pulled it up to pitch again it simply continued to slip back. I realized that the becket was moving so took off the string, cut off the old becket and reinserted the string with a longer becket. This one slipped as well. Since the string spanned two notes and was high up in the piano I decided to leave it until I could decide to either replace the tuning pin or figure out exactly why this was happening. I've avoided nickel tuning pins for various reasons (mostly looks and tuning lever feel) when possible but haven't encountered something like this. There is clearly something about the pin which is causing this to happen but I'm not sure exactly what that is. Thoughts? David Love www.davidlovepianos.com
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