The Acoustic Guitar Forum

Go Back   The Acoustic Guitar Forum > General Acoustic Guitar and Amplification Discussion > Build and Repair

Reply
 
Thread Tools
  #1  
Old 06-19-2017, 05:05 PM
tmatmatma tmatmatma is offline
Registered User
 
Join Date: Jun 2017
Posts: 2
Default Problem with very slack string tension on 12 string guitar

I have just acquired a very nice old Kimbara 12 string acoustic for a great price. The purchase was from gumtree - upon inspecting the guitar the only obvious issue I could spot was that the all the strings had not been changed by the previous owner for many, many years. I bought the guitar on the spot and replaced all the strings. Unfortunately, on about three of the strings - the high octave E, A and G strings - the tension is way, way too slack. I attempt to tune them up, but the looseness of the string does not allow them to stay in tune and obviously they are simply not comparable to the other high octave strings, which sound feel great.

I am trying to determine the source of the problem. The machine heads do not have screws on them, they are part of an enclosure. I have seen advice elsewhere recommending to tighten these, but obviously this is something I can't do.

I did notice that the circular base of these three machine heads is not entirely flush with the headstock. I have tried removing the strings and pushing the machine heads flat, but they don't appear to be moving much.

From the description given, can anyone offer any advise over what to do in this situation? Would removing all the machine heads and reassembling be advisable? I want to check before I take anything apart.

I have enclosed a picture to try and show how the problem machine heads don't appear to be entirely flat (although I have noticed a couple of strings which are not so slack aren't entirely with flush machine heads either, albeit at less of an angle), though I don't know if I have captured this well. I could possibly take a video if the info I have given here doesn't reveal an obvious answer. Any help would be greatly appreciated!



Reply With Quote
  #2  
Old 06-19-2017, 06:10 PM
mirwa mirwa is offline
Registered User
 
Join Date: Sep 2013
Posts: 2,263
Default

The top washers are actually a small press in mushroom shaped cover that surrounds the shaft of the machine head.

They will not affect the tuning or function of the machine heads, if you want them to sit flusher, remove the string clean the hole and press them firmly into place

Steve
__________________
Cole Clark Fat Lady
Gretsch Electromatic
Martin CEO7
Maton Messiah
Taylor 814CE
Reply With Quote
  #3  
Old 06-19-2017, 07:38 PM
ricklt ricklt is offline
Registered User
 
Join Date: Feb 2017
Posts: 184
Default

The screws in the gear on the back of the headstock are the screws that need tightened. That should solve your problem.

Sent from my XT1650 using Tapatalk
Reply With Quote
  #4  
Old 06-19-2017, 09:19 PM
LSemmens LSemmens is offline
Registered User
 
Join Date: Aug 2016
Location: Riverton South Australia
Posts: 1,668
Default

Good score. As above, the washers, do nothing in regards tuning, and the screws just neded a little tightening.

Are you sure that you set the string in the bridge pins properly?
__________________
Maton CE60D
Ibanez Blazer
Washburn Taurus T25NMK
Reply With Quote
  #5  
Old 06-20-2017, 04:18 AM
tmatmatma tmatmatma is offline
Registered User
 
Join Date: Jun 2017
Posts: 2
Default

Quote:
Originally Posted by LSemmens View Post

Are you sure that you set the string in the bridge pins properly?
I now think this could be the issue. I've ordered new pins in case these old ones are past their best.
Reply With Quote
  #6  
Old 06-20-2017, 04:43 AM
HHP HHP is offline
Registered User
 
Join Date: Aug 2007
Location: Indianapolis, IN
Posts: 29,372
Default

Dumb question, but are you sure you are tuning an octave above the primary string? If you can get it to pitch, its not the pins or the machine heads as they would affect both octave and primary.
Reply With Quote
  #7  
Old 06-20-2017, 07:11 AM
runamuck runamuck is offline
Registered User
 
Join Date: Jul 2006
Posts: 1,524
Default

You're saying that when brought up to proper pitch the problem strings are slack, correct?

If that's right, the string gauges are wrong.

There may be other issues with the tuners but they're irrelevant to the strings being slack.
Reply With Quote
  #8  
Old 06-21-2017, 01:25 AM
ricklt ricklt is offline
Registered User
 
Join Date: Feb 2017
Posts: 184
Default

Can you explain how you tuned it. Did you tuned it once and call it good. Not trying to say you don't know what you are doing. Just trying to get a good picture of what's happening. I have to tune mine 3 or 4 times initially, to get it right, and then a couple of times later after the strings stretch. I'm sure you probably know all this, but if you don't, it might explain the problem.

Sent from my XT1650 using Tapatalk
Reply With Quote
Reply

  The Acoustic Guitar Forum > General Acoustic Guitar and Amplification Discussion > Build and Repair

Thread Tools



All times are GMT -6. The time now is 01:09 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright ©2000 - 2018, The Acoustic Guitar Forum
vB Ad Management by =RedTyger=