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Topic: strange tuning problem |
John Roche
From:
England
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Posted 27 Dec 2011 5:08 am |
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| I have a Carter uni 12 steel , I have a problem with the 6th string tuning, I tune it open and then tune it with the b pedal down, if I press the b pedal a few times the tuning with the pedal down go way out of tune , sharp, now if I wiggle the tuning wrench with it attached to the hex tuner the tuning returns to the correct pitch, I cannot find anything binding and everything is lubed , it is driving me mad..the guitar is as it came from the factory.. any ideas please... |
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Jim Palenscar
From:
Oceanside, Calif, USA
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Posted 27 Dec 2011 7:24 am
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| Check the cross shaft to insure that there is a bit of free play before the pedal engages. If not- back off the stop a bit then re-tune it. |
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Dan Beller-McKenna
From:
Durham, New Hampshire, USA
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Posted 27 Dec 2011 7:25 am
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John,
just stating the obvious, and you've probably already checked this but....
Are there any threads on the pull rod beyond where the nylon hex nut is screwed on? If there were, that might account for the wiggling of the wrench bringing it back to tune(i.e., a thread is getting caught on the changer, keeping the note sharp, but the rod is freed when you wiggle the wrench).
As I said, you likely already checked this.
Dan |
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Jim Palenscar
From:
Oceanside, Calif, USA
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Posted 27 Dec 2011 7:33 am
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| Also- if there is no spacer between the tuning nut and the changer finger sometimes the points of the hex on the tuner will be against the finger and sometimes the sides- causing it to not be consistent and when that happens I round the end of the tuning nut. |
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Dave Grafe
From:
Hudson River Valley NY
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Posted 27 Dec 2011 10:28 am
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Can't say this is relevant but on my P/P if a string gets pushed to the side of its usual track over the finger the tension is directed sideways enough to make the finger stick before it returns fully to the rest position.
This can happen if there is a bump to the bridge when when putting the guitar in its case, so you might check all the changer fingers to ensure that the strings are all properly centered on each. |
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John Roche
From:
England
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Posted 27 Dec 2011 12:08 pm
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Thanks guys , I have checked all the above and there is nothing i can see that is causing the problem.
On the pedal 7 there is also a 6th string G# to A change , now this works fine with no tuning problems.
I have also swapped the hex nut for another but it`s still the same problem .. Thanks again |
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Henry Matthews
From:
Texarkana, Ark USA
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Posted 27 Dec 2011 12:37 pm
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John, make sure the keyhead rollers aren't sticking, this will cause tuning problems. Other than that, it could be a changer problem with maybe the rivit on the changer either too loose or to tight and binding. Had that happen on an Emmons I had. Almost drove me nuts until I took the changer apart.---Henry
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Henry Matthews
D-10 Magnum, 8 &5, dark rose color
D-10 1974 Emmons cut tail, fat back,rosewood, 8&5
Nashville 112 amp, Fishman Loudbox Performer amp, Hilton pedal, Goodrich pedal,BJS bar, Kyser picks, Live steel Strings. No effects, doodads or stomp boxes. |
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richard burton
From:
Britain
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Posted 27 Dec 2011 1:41 pm
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John,
Take a look at the brass roller (on the bellcrank) where the hook on the pull rod from string 6 connects.
I have seen an instance where that brass roller was worn on one side, which if it turned during tuning, could cause the problem that you're experiencing.
Unlikely, I know, but with the changer finger working correctly with another pedal, one has to look further up the pulling train |
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Henry Matthews
From:
Texarkana, Ark USA
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Posted 27 Dec 2011 2:36 pm
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If you are only pulling a half tone with the pull that tunes ok, then your whole tone pull must be the problem. I still say it could be in the changer but you might also check the return springs and make sure that they aren't letting the changer pull away from the stop on a raise. They should only move for a lower. If Carter's have a phillips screw on the endplate to tighten spring, try that.Tighten up untill spring no longer moves on a raise.If no adjustment screws, you may change out springs from another string that doesn't pull that is a little stronger.--Henry
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Henry Matthews
D-10 Magnum, 8 &5, dark rose color
D-10 1974 Emmons cut tail, fat back,rosewood, 8&5
Nashville 112 amp, Fishman Loudbox Performer amp, Hilton pedal, Goodrich pedal,BJS bar, Kyser picks, Live steel Strings. No effects, doodads or stomp boxes. |
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John Roche
From:
England
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Posted 28 Dec 2011 5:16 am
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I have removed the hex nut and file it flat where it presses against the changer and it seems to have done the trick, got a gig tonight and will check it throughout the night, hopefully it has been sorted..
Thanks again to all of you for you help.... |
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John Roche
From:
England
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Posted 29 Dec 2011 12:11 pm
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Well after playing last night I finally found the problem, it was caused by some hard foam I had put under the rods for the sixth string to reduce the little bit of clatter I was getting in the studio.
the foam must to have being giving way from the tension on the pull rods causing the tuning to change.
.. |
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Ransom Beers
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Posted 29 Dec 2011 1:02 pm
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They had the same problem wit the space shuttle didn't they"LOOK OUT FALLING FOAM"
I had a similar problem,come to find out it was the wood shrinking causing the changer assembly to hang up.Took some spacers off of the 1/2 in. axle & now it works fine.Thanks to Jerry Fessenden. |
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