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Post subject: Sympathetic Resonance
Posted: Thu Jul 09, 2009 2:17 am
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I have a Fendermex Standard Strat, 6 months old, and when I play a B note on the A string 14th fret or B on the D string 9th fret a strange sympathetic resonance starts, It is clearly audible and seems to inter-react/phase with as well as prolong the original note. This happens whether plugged into an amp or not. It does not happen with any other notes. Has anybody any ideas?


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Posted: Thu Jul 09, 2009 3:36 am
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Its more than likely something worked loose that is responding to that certain frequency. Do you hear it on the 19th fret of the low E string too. How about the 4th fret of the G and the open B? Is it there but alot more subdued? If so then its certainly something loose responding to that frequency. Check the neckplate screws, tuning heads, pickguard screws, jackplate screws, saddle height adjusting screws. It will likely be one or two of something in that list.

Myself i find those funny resonances pleasant (yep i often play with the headstock resting on a wooden table). If i could i'd loosen everything so that every note produced that sound.

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Posted: Thu Jul 09, 2009 4:06 am
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I haven't tried the E string 19th fret but nothing appears to happen on the other two. I'm away from my guitar at present but I'll try that. The resonance is so loud it can be heard whilst strumming a barre B Maj chord on the 14th fret with an amp!


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Posted: Thu Jul 09, 2009 4:38 am
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I haven't tried the E string 19th fret but nothing appears to happen on the other two. I'm away from my guitar at present but I'll try that. The resonance is so loud it can be heard whilst strumming a barre B Maj chord on the 14th fret with an amp!


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Posted: Thu Jul 09, 2009 9:02 am
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Have you checked to see if your tremelo springs could be the source?


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Posted: Thu Jul 09, 2009 9:33 am
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I haven't but I will, I'm not sure what I can do if it is though!


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Posted: Thu Jul 09, 2009 9:47 am
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Hi James: Nikininja has very likely hit the nail on the head.

Now you gotta just get your ear down close to the guitar while plucking those resonant notes and try to discover where it's coming from.

I had a similar issue and it finally turned out to be the pickguard vibrating against the body in that spot above the neck pickup where there's no fixing screw. After that, lots of others turned out to have the same issue. Annoying, but easy to solve...

Cheers - C

PS: I'm also with The Ninja on the resonant furniture thing. I have a sofa I sometimes play on, and if I touch the headstock to the back of the seat I get lovely sympathetic bass notes. I've tried fixing that sofa to the headstock with a capo so's I can enjoy the sound all the time, but it's just too darned heavy. :roll:

I also find touching the headstock to the side of a cranked speaker cab gives interesting results...


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Posted: Thu Jul 09, 2009 10:15 am
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James Hall wrote:
I haven't but I will, I'm not sure what I can do if it is though!


If it is the springs, do this:

Cut some small pieces of foam - upholstery foam, left over Auralex, whatever - a little bigger around than the inside of the springs and a little longer. Take a left-over guitar string and bend it, shoving the end of the bend through the center of the spring. Insert one end of the foam piece through the loop in the string, and pull the foam through the center of the spring until it's all the way through. Do this with all the springs and then snip the ends of the foam with scissors to match the length of the spring.

DOing this can really tighten up the fundamentals on a Strat.


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Posted: Fri Jul 10, 2009 5:44 am
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Try a very slight neck adjustment. Sometimes this is all it takes to make such things go away.

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