#31
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All metals are elastic and, in the case of filaments like guitar strings, are wound by the tuning machines to a certain elastic tension where each will emit a frequency relative to their varying tensions.
Once the strings begin to stretch out they lose their initial tension (tuning) and must be re-tensioned with the tuning machines. They will continue to stretch throughout their usable life, requiring corrective tuning, until their elasticity is gone. This is fatigue. Once a string reaches its fatigue point it will break if tightened. When a string will no longer stretch it will not lose tension anymore. This is when people claim their (old) strings hold tuning very well. They may hold their tuning but their sonic frequency response is only a fraction of their response when new. This is the point they are said to go flat. I've read many, many posts claiming a preference for stretched-out (flat) strings. That's not a bad thing. It just means that their guitars do not provide the sound they like with new strings on. I buy guitars that sound their best with new strings and change them often. That all said, new strings are not at their highest (possible) tension when tuned to pitch. They are only at their tuned tension. They can be stretched beyond that to their breaking point, which exceeds their normal elasticity for their alloy characteristics and respective cross-sections (circular mils), or metallurgical specifications, but they are alloyed and sized to meet the demands of music wire requirements. This includes ensuring the total tension of all the concert-pitched strings combined to be of a value that does not place undue compression loads grain-wise across the guitar top, or excessive shearing loads on the bridge, and still manage to have the flexibility needed to easily pluck them (place them in motion). This means the strings are engineered to specifications that far exceed concert pitch playing demands if they are to offer reliability, longevity (ear dependent) and playability to the user. This means they are capable of stretching well beyond their concert pitch mean tension respective of the frequency responses they are design to emit. All strings of a certain alloy will stretch after being brought to concert pitch. We all know this because we usually have to retune them frequently after replacing them until they settle down and become somewhat stable. This is the normal stretching out. Coatings cannot impart anything to the metal to prevent this characteristic. They can only slow down the entrance of corrosive skin acids by virtue of their coatings (wound strings only) but the unwound strings typically reach their flat states of fatigue well before any corrosive damage occurs to the wound strings. The rate of stretch over the life of a particular alloy/size string lessens with age until it can't stretch anymore. The rate is increased and the life is decreased with playing (player induced fatigue) so the maximum life of a string varies with age and play. But, remember that it's metal elasticity that makes strings resonate at frequencies dependent upon their tensions higher, lower or at concert pitch stretch . |
#32
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Quote:
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Derek Coombs Youtube -> Website -> Music -> Tabs Guitars by Mark Blanchard, Albert&Mueller, Paul Woolson, Collings, Composite Acoustics, and Derek Coombs "Reality is that which when you stop believing in it, doesn't go away." Woods hands pick by eye and ear
Made to one with pride and love To be that we hold so dear A voice from heavens above |
#33
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It's on the Internet. It must be true.
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#34
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Quote:
If a guitar were strung with strings of a non-elastic material, and tensioned below it's breaking point, it could not produce a given pitch -- i.e., oscillate appropriately -- when plucked? It would not return to its original length, and be good for one note? Or maintain integrity through "strength"? |
#35
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If you want a real deep dive into tension and torque--
http://siminoff.net/cms/wp-content/u...whitepaper.pdf Currently trying his strings for the first time and I do like them for low tension strings and half the price of the similar Santa Cruz strings. |
#36
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Sounds like a good experiment, put some accurate tensiometers on a composite frame and monitor tension and length in a climate controlled room. Need more time and money.......
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#37
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Dont believe everything you hear on the internet -
its like this forum -most is just a persons opinion - were guitar players - that doesn't put a PHD after our names .
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--------------------------------- Wood things with Strings ! |
#38
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Since I've learned to properly seat my strings when I put them on my guitars go weeks at a time without going out of tune. The only thing that changes that is when major weather fronts go by. I suspect that has more to do with the wood changing to humidity that string change. The top flexes and changes the bow of the neck ever so slightly. Just my opinion.
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#39
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Old strings become harder to tune because they are no longer perfectly uniform along their length. Perfect intonation can only be achieved with a string that is uniform. But I don't believe the typical amount of reduction in cross section is enough to feel as lowering the tension. I believe the main reason for this perceived effect of lowered tension is a reduction in the bending stiffness of the wound strings, due to loosening of the windings. This is one reason that strings go dead. |
#40
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Last edited by charles Tauber; 02-21-2019 at 08:09 AM. |
#41
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Quote:
- Glenn
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My You Tube Channel |
#42
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Yes, interesting topic from a materials engineering perspective. Thanks.
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#43
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But John Arnold is a known expert in the world of acoustic guitars and guitar related materials. If he says this is what happens, I tend to believe him. - Glenn
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My You Tube Channel |
#44
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Quote:
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Faith Mars FRMG Faith Neptune FKN Epiphone Masterbilt Texan |
#45
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Quote:
. Last edited by charles Tauber; 02-21-2019 at 08:09 AM. |