T.R | Title | User | Personal Name | Date | Lines |
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336.1 | one possibility | ERLANG::SUDAMA | Living is easy with eyes closed... | Wed Sep 09 1987 18:32 | 24 |
| It's possible that the string is vibrating at the bridge. I don't
know what kind of bridge you have, or what kind of strings you have
used in the past, but if the bridge slot is not formed properly,
a narrower string might "rattle" at certain frequencies, whereas
a larger string would not. You should have something like this,
looking at the bridge and string in cross-section:
.-\o/-.
not this:
.-|o|-.
Sorry for the crude pictures, but the point is, the sides of the
slot should be tapered. This problem could also occur at the nut,
although that seems less likely since you say it happens when the
string is pressed at the first fret.
I have occasionally seen buzzing of this nature in wound strings,
which I theorize has something to do with an imperfect winding.
That is, I believe the winding may actual not be in good contact
with the core. I have never observed it before on unwound strings.
- Ram
|
336.2 | | INK::FRISSELLE | | Tue Sep 15 1987 15:13 | 25 |
|
A few questions: First, I'm not real familiar with the Yamaha line,
but I assume by the model name that it's a hollow-body electric
ala Gibson ES (or am I on the wrong track?). If so, could the ringing
be some sort of "sympathy" electronic response caused by the acoustic
qualities in the body? Perhaps in combination with a vibration
as described in .-1?
Which leads me to the next questions: Does this happen regardless
of volume level? Does it happen when you play those frets
acoustically, i.e., not amplified?
And finally, is this a new guitar, i.e., is this the first set of
strings you've tried on it? If not, has this happened with other
string sets? Either way, could be you've got a couple of defective
strings, or, as you suggested, this set is not ideal for this guitar.
The only way I know to find that out is to try another set. See
what happens if you go to a different gauge.
My curiosity is piqued -- please let us know what you find out.
Good luck,
steve
|
336.3 | Update... | GNERIC::SIEGEL | | Tue Sep 15 1987 18:15 | 18 |
| The axe is an SE 250 (sorry about the mix-up). I took it to Acton
Music Center, and talked with Dan (nice guy, seemed to know what
he was talking about). He played it without even plugging in, and
immediately said it was due to the 1st fret being too high. He
also noticed that the neck was slightly mis-aligned, so the truss
rod could use an adjustment. He said because of the fret being
too high, the string would go off and play upper harmonics on top
of the base note (or something like that, he talked fast).
Anyway, I'm trying to find a Yamaha dealer around here, or get Yamaha
to authorize Acton to fix it for free (since I bought it recently).
The place I bought it is 450 miles away, so bringing it back would
be out of my way.
What do you think about Dan's diagnosis???
Adam
|
336.4 | High??? | GNERIC::SIEGEL | | Tue Sep 15 1987 18:17 | 3 |
| By the way, by the fret being "high", I mean that literally. It
needs to be sanded down a bit.
|
336.5 | "sounds" reasonable | ERLANG::SUDAMA | Living is easy with eyes closed... | Wed Sep 16 1987 09:41 | 24 |
| That sounds like a reasonable diagnosis. As I mentioned earlier,
this kind of problem might not be noticed with heavier gauge strings
on, because they would ride higher in the notch on the nut. What
appears to be happening, if he is correct, is that the string vibrates
just close enough to the fret so that it doesn't buzz, but does
create a harmonic, just as if you touched the string lightly with
your finger at that position and played it. This harmonic "rings
out" over the fundamental frequency produced by the string, which
is still heard clearly.
The solution to this may be to take the fret down a little, although
it is also posible that the truss rod is a little too tight, and
is therefore pulling the upper neck back a bit more than it should.
I assume he looked at this.
By the way, frets are generally filed down, not sanded. This is
not a big deal, and I don't see any reason why Yamaha should object
to having it done at Acton Music (although personally, I wouldn't
have *anything* done at Acton Music - I won't even walk into the store
because of the way the owner treated me once when I didn't go for a
"hot deal" he offered me - but that doesn't necessarily mean they
don't have a decent repair person).
- Ram
|
336.6 | Acton music, noooo.... | PARSEC::MELENDEZ | | Wed Sep 16 1987 09:52 | 2 |
| I would take it to Mcduff (sp?). I agree with .5 on Acton
music.
|
336.7 | Hmmmm... | ERASER::FRISSELLE | | Wed Sep 16 1987 14:56 | 40 |
| I'm no expert, or maybe I'm just slow to catch on, but so far that
explanation doesn't satisfy me. I mean, he may be right -- I don't have
enough knowledge in this area to contest the prognosis -- but I don't
see how the *first* fret's being too high would cause that harmonic
response.
I assume that what he was getting at is what .5 said:
> What appears to be happening, if he is correct, is that the string
> vibrates just close enough to the fret so that it doesn't buzz, but
> does create a harmonic, just as if you touched the string lightly
> with your finger at that position and played it.
I understand the concept. The problem I have with this explanation is
that you said the ringing only happens when you press those strings *at
the first fret*. If that fret is too high, what could it be vibrating
against that would cause the harmonic? This kind of explanation would
make more sense (to me, anyway) if the first fret were too *low*, so
the strings would be vibrating too close to the *second* fret.
OR if it were some other fret, such as the second, that's too high.
Furthermore, if you're *pressing* the string down on the first fret,
how could that fret be responsible for the harmonic?
I know what you mean about remembering the details of an explanation
that's presented in a hasty manner. I learned long ago to force
fast-talking types to either slow down, reiterate, or further explain
what they've said. Sometimes they realize for themselves that
they've jumped to conclusions. Or not. %^)
I can still believe, however, that *some* kind of harmonics are involved
here. And I'm still wondering about the characteristics of the guitar,
i.e., is it hollow? Does it make that sound *before* you plug it in?
(You mentioned that the repair person didn't plug it in, but didn't say
whether or not it made that sound. If he didn't bother to reproduce
the problem, that's all the more reason I'd want another evaluation,
preferably someplace else.)
steve
|
336.8 | Quick check for high fret, and cure... | TARKIN::TTESTA | Recycle used notes, get an Echoplex! | Wed Sep 16 1987 15:29 | 22 |
| I've tried this method to find buzzing frets, and it may work
for a fret causing harmonics. (You will know, because the buzzing
of the paper will tell you)
Take a piece of *very* thin paper, slide it under the string
at one of the high frets and play the string to recreate the noise.
Carefully slide the paper towards the 1st fret slowly (keep the
paper close on the frets). You may want to play the string each
time the paper covers the next fret. (The string vibrates furthest
on the attack) If you find a fret where the fret buzz (or in your
case "Harmonic") goes away because the paper is now buzzing instead,
then you may have found a high fret. A steel straightedge laid along
the frets parallel to the offending string will quickly confirm
that the fret is indeed higher than the others before it.
You could take it in for filing or if you are handy and have
the right tools (a small flat, fine file) you can file it yourself.
Always file frets in parallel with the string by laying the file
on all frets and *gently* file a few strokes, check with straightedge,
wipe with moist cloth, then play until buzz or harmonic is gone.
Tom Testagrossa
p.s. Of course, a high fret might not be the problem, but if the
bridge and string saddles are o.k. than it must be a high fret.
|
336.9 | Opps, forgot something... | ERLANG::SUDAMA | Living is easy with eyes closed... | Wed Sep 16 1987 15:45 | 20 |
| Agree with .7 and .8 - I forgot you said originally that this problem
only happens when the string is fretted at the first fret. If it
happened when the string was open, then the first fret might be
suspect. Otherwise, it is more likely the second fret that is too
high (or, as suggested, the first fret could be too low), or some
other fret further up the neck.
Also, as I said before, I have frequently found this kind of problem
to result from improper adjustment of the truss rod, rather than
the frets being too high or too low. If the neck is bowed back a
little too much the frets toward the middle of the neck will be "higher"
than those at the ends. Depending on how the truss rod is designed
the position on the neck where the problem first appears will be
different. I have seen it very commonly that buzzing will start
to occur at the first, second, third, or fourth frets before the
others, and fixed this simply by backing off on the truss rod a
touch. I would definitely check this out before starting to file
the frets.
- Ram
|
336.10 | Thanx people | GNERIC::SIEGEL | | Thu Sep 17 1987 10:50 | 9 |
| Wow, I've got a lot of input from everyone - that's good.
I would like to take your advice and go to McDuff's and have someone
there take a look at it for a 2nd opinion.
Where is this place???
Adam
|
336.11 | MacDuff's Location (Again) | AQUA::ROST | Fast and bulbous, tight also | Thu Sep 17 1987 11:04 | 7 |
|
MacDuff's Music is on Rt. 9, westbound side, in Shrewsbury, MA right
after Spag's and right before Leiser Sound.
Hours are roughly 10:30 to 7 during the week, they close at 5 on
Saturdays.
|
336.12 | Solved... | GNERIC::SIEGEL | | Tue Sep 29 1987 14:50 | 7 |
| I took it to Kurland, and Sean adjusted the truss rod a bit. He
said the frets were OK. When I got it home, the ringing was gone.
Thanks for your input.
Adam
|