acrosonic string breakage

Dave McKibben davespianotuning@earthlink.net
Sun, 30 Oct 2005 08:02:38 -0800


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List:

I just tuned a Baldwin acrosonic that by S/N was 15 years old, but it appeared to be older.
My question revolves around the attached picture ( as best I could draw the problem ).
The strings A2, A#2, G2, G#2, F2,F#2 and C3 all broke when doing an 80-100 cent pitch raise.
I warned the owner that I could tune it to less than A440 to help reduce string breakage but she wanted it at A440 so she could play with other instruments.

All the strings were on the bottom row of tuning pins, which creates a steeper angle to the Vbar.
The angle to the Vbar was so great, that the last coil on the pin was trying to cut across the previous adjacent coil on the tuning pin.  ( see pic ).
It appeared to me THAT is why the strings broke, each one right at the pin coil.
It did NOT appear that the pins were pounded in, creating a steeper angle.

My question is:
Is this normal pin / string coil configuration for acrosonics?
has anyone seen this before, and what might the problem and fix be?
I'm sure someone on here knows the answer !

Thanks much

Dave McKibben
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