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 Post subject: RICKENBACKER 660-12 Intonation problems,
 Post Posted: Wed Jun 15, 2011 11:46 pm 

Joined: Sun Mar 06, 2011 6:46 am
Posts: 3
Hi from UK. On Mar 7 2011 I posted a piece about intonation probs with my 660/12. When tuned to pitch it was fretting seriously sharp on frets 1-3 on strings 8, 10 and 12, the heavier the string the sharper the note. Suggested fixes in reply to my post were to ensure that the neck was set up with no relief and use a good quality string. With that in mind the neck was duly adjusted and I fitted some D’Addarios with an 046 12th. Neck is 100% true.
I still have the problems but have noticed something interesting. The intonation is perfect when I play a G bar chord but when I play the three-fingered G, strings 12 and 11 are sharp. Playing single string solos fret sharp too so it’s a pressure thing.
This is new to me; I have a ’64 335, Custom Tele, Epi Casino, Yamaha AEX, Hamer Standard and Amistar Stager and I have never had this prob before with any of them. Any ideas? Fixes? Ironic given the lowish profile of Rickenbacker frets.

 Post subject: Re: RICKENBACKER 660-12 Intonation problems,
 Post Posted: Fri Jun 17, 2011 5:55 am 

Joined: Sat Sep 27, 2008 10:49 pm
Posts: 573
Location: Stanstead, QC
Strings are too thick for the nut grooves. They are riding high in the slot and not touching bottom so that fretting is the same as "bending" the strings since they are riding much too high over the first few frets.

I bet that you also have problems getting those strings to stay in tune as well. As you tighten the peg, the string will prefer to bind in the slot first, build up a certain tension, then suddenly slip tighter.

Loosten the offending strings, fold a piece of fine sandpaper, moisten it with rubbing alcohol and run the business side slowly and gently in the offending grooves a few times then re-try.

I am willing to bet that your problem will disappear within half an hour of gentle work.

P.S.: this is not, strictly speaking, an intonation problem and seems to be very common. It would be nice of the moderator added a sticky to this combined with other posts under the title "12-strings too sharp in the lower neck positions".

 Post subject: Re: RICKENBACKER 660-12 Intonation problems,
 Post Posted: Sat Jul 23, 2011 4:50 pm 

Joined: Sun May 27, 2007 1:28 am
Posts: 7
Location: Toronto
Had a very similar problem with my 330/12. My local guitar shop took a look, and the first comment from the tech was that the nut was too high. The angle was so great at first position that it would bend the notes on g chord.

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