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Topic: Just cant find the problem on B pedal |
Greg Lambert
From:
Illinois, USA
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Posted 25 May 2017 11:54 am |
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| When I raise my Ab to an A with the B pedal and lower the E's with the lever my A goes sharp. Cant seem to find anything wrong. No other string goes sharp or flat so its not related to cabinet drop. I dont see any movement with the A string mechanisms either and the head stock is stable as are the tuning keys. |
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Ricky Davis
From:
Bertram, Texas USA
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Posted 25 May 2017 2:32 pm
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Which Ab to A string?? and what gauge is it??
And do you have adjustable return springs?? and is there a raise helper spring on the string you are talking about?
Ricky
_________________
Ricky Davis
Email Ricky: sshawaiian2362@gmail.com |
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Lane Gray
From:
Topeka, KS
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Posted 25 May 2017 2:40 pm
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Where in Illinois? If you're along Interstate 70, I can take a look at it Saturday or Sunday
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2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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Lane Gray
From:
Topeka, KS
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Posted 25 May 2017 2:42 pm
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If it's the third string, look for a ball end or something transferring effort from the 4L scissor to the 3R
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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Greg Lambert
From:
Illinois, USA
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Posted 25 May 2017 6:54 pm
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Its the 6th string. Nothing else goes sharp
Last edited by Greg Lambert on 25 May 2017 6:58 pm; edited 1 time in total |
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Greg Lambert
From:
Illinois, USA
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Posted 25 May 2017 6:55 pm
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| Lane Gray wrote: |
| Where in Illinois? If you're along Interstate 70, I can take a look at it Saturday or Sunday |
Thanks but I from way down south about 40 miles from Ky. |
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Greg Lambert
From:
Illinois, USA
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Posted 25 May 2017 6:57 pm
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| Ricky Davis wrote: |
Which Ab to A string?? and what gauge is it??
And do you have adjustable return springs?? and is there a raise helper spring on the string you are talking about?
Ricky |
No helper , its a Derby D10. I do have adj. return spring that I have already tried. |
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richard burton
From:
Britain
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Posted 26 May 2017 12:38 am
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It could be cabinet raise, which occurs when some strings are lowered, releasing tension in the cabinet, which causes the cabinet/changer axle/headstock to flex slightly, and will be most noticeable by the 6th string slightly rising in pitch.
I always use a wound 6th string, as it is much less susceptible to cabinet drop / raise than a plain string. |
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Ricky Davis
From:
Bertram, Texas USA
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Posted 26 May 2017 6:26 am
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Yes; it is the result of using a Plain 6th string. Go to a wound .022 and troubles with that will be over. Or try a different maker(mainly Jagwire) of the plain .020p or .022p.
Ricky
_________________
Ricky Davis
Email Ricky: sshawaiian2362@gmail.com |
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Jim Palenscar
From:
Oceanside, Calif, USA
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Posted 26 May 2017 6:52 am
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That's not an uncommon problem- do as Ricky says  |
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Jerry Overstreet
From:
Louisville Ky
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Posted 26 May 2017 7:00 am
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I've never noticed this kind of problem on a Derby and I always use a plain 20. In fact, Charlie recommended a 22P.
If you're just noticing a little variation on your tuning meter it's no big deal. If, however, it's audible and it's a lot, then something must be dragging or binding somewhere in the mechanism.
Flop the guitar over on it's back and observe what's happening when you activate those changes. Your guitar should be able to accommodate these gauges without major tuning problems. |
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Greg Lambert
From:
Illinois, USA
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Posted 26 May 2017 12:39 pm
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| Jerry Overstreet wrote: |
I've never noticed this kind of problem on a Derby and I always use a plain 20. In fact, Charlie recommended a 22P.
If you're just noticing a little variation on your tuning meter it's no big deal. If, however, it's audible and it's a lot, then something must be dragging or binding somewhere in the mechanism.
Flop the guitar over on it's back and observe what's happening when you activate those changes. Your guitar should be able to accommodate these gauges without major tuning problems. |
I can actually hear a slight raise in the pitch. Up the neck it becomes more noticeable.
I cannot see anything move under the cabinet. Guess Ill try a different type of string. |
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Georg Sørtun
From:
Mandal, Agder, Norway
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Posted 26 May 2017 8:08 pm
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| Greg Lambert wrote: |
| I can actually hear a slight raise in the pitch. Up the neck it becomes more noticeable. |
That it is more noticeable up the neck indicates that you are dealing with a slight changer-axle flex. No easy fix for that but to replace the axle with a more rigid one, and before even attempting that it must be determined that the axle really is flexing.
| Greg Lambert wrote: |
| Guess Ill try a different type of string. |
That's the way to go. A wound 6th should reduce the problem to next to nothing, if your PSG (and copedent) can handle a wound 6th. |
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Kevin Fix
From:
Michigan, USA
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Posted 26 May 2017 8:08 pm Strings
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| Going from a plain to wound will do it. That, or move rod on bell crank farther away from cross shaft. |
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