[pianotech] String Replacement Emergency Question (well, kinda)

Terry Farrell mfarrel2 at tampabay.rr.com
Fri Feb 11 10:33:50 MST 2011


Hi Folks.  I just got back to my shop after trying to replace a  
spliced bass string and have run into a problem.

The piano is a 1950 good condition (relatively speaking) American  
console piano. Bass string broke (monocord) the other day while  
tuning. Strings are a little bit tubby, so I recommended splicing  
rather than replacement to maintain even tone. String broke right at  
the tuning pin. I spliced the 0.049" wire (ouch!) and made a nice neat  
little (well, no so little because I could only pull so hard on the  
darn thing - couldn't tighten it up much) knot. I made the knot as  
close to the end of the broken string as possible. Unfortunately, the  
string has it's tuning pin fairly close to the upper speaking length  
termination (what the heck do you call the little steel pin (looks  
like a small hitch pin) on that ridge on uprights that the strings  
bend around and form the upper speaking length termination? I'll refer  
to it as the upper termination pin (UTP)).

So I go to the home this morning and attempt to install the spliced  
string. Put everything in place and find that the knot won't quite  
pull past the UTP (I thought it would once I get a little tension on  
the string). Tap it a bit, won't go. I tried twisting the string for   
exposure of a more favorable part of the knot to the UTP - still won't  
pull past the UTP. Maybe a little more tension - nope, won't go - knot  
still hung up on UTP.

Okay, so plan now is to remove some windings and make a knot a  
centimeter or so lower into the speaking portion of the string. I know  
it may affect string tone - I figure I'll just try it and see how it  
sounds.

That's not the problem. The problem is that I have now bent the UTP. I  
think it is bent enough that whether I put a re-spliced string on the  
piano or a new string, that the pin may fail - and even if it doesn't  
fail, it may bend a little more and not retain the string.

Seems to me I have two options: Cross my fingers and go for it and see  
what happens. Problem with that is that the UTP may break, and if it  
does, it will likely break right at the plate surface - that will make  
it nearly impossible to remove. The other option is to attempt to  
remove it while I have something to grab onto and try to pull it out  
(while again, crossing my fingers). If it pulls out, then all I need  
to do is find a similar size (or a bit larger) steel pin and replace.

I'm looking for recommendations. I keep telling myself to keep my  
camera with me. Maybe this will convince me to do so. Sorry, but no  
picture. I've chopped off many a hitch pin, but not UTPs. Are they  
just tapped in and I should be able to simply pull one out?

I realize that I can drill a hole immediately adjacent to the original  
pin (if it were to break) and install a new one. But that will move  
the string way over and then I'll have a poorly aligned hammer (I  
guess not that big a deal) and I'll have to fart around with the  
damper. I'd rather utilize the original UTP hole. Probably would have  
been smart of me to have measured the diameter of the UTPs in the  
piano. I guess I'll have to bring a few sizes of drill bits and steel  
pins with me when I go back (ASAP - in an hour or so).

I wonder how many hours it's gonna take me to replace one string (at  
my standard string replacement fee). Crud.

Glad I like to watch some very philosophical television shows. Because  
of that I am well aware that "worse things happen at sea!"

Terry Farrell


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