Hmpf

Please put your pickup/wiring discussions in the Electronics section; and put discussions about repair issues, including fixing errors in new instruments, in the Repairs section.

Hmpf

Postby Matt Atkinson » Mon Dec 09, 2019 6:52 pm

Cut binding channels today. I haven’t worked on this guitar for a while and the closed body has been sitting around. Shop humidity is under control. I gave the top a tap as I usually like to do and it sounds tight as a drum. The plates rang nicely before assembly. Dead as a door nail. I have an old beater I made years ago somewhat disassembled, and that one booms when I tap it. Hmpf...
The top is .110”, back is .105
Bracing is fairly light.
Will thinning the top help perhaps? Scraping the tone bars?
Thoughts?
Matt Atkinson
 
Posts: 41
Joined: Fri Apr 18, 2014 2:35 pm
Location: New Hampshire

Re: Hmpf

Postby Barry Daniels » Mon Dec 09, 2019 7:12 pm

Cutting the binding channels will make the body sound dead. Glue in the bindings and you will get your tap tone back.
MIMF Staff
Barry Daniels
 
Posts: 2431
Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Hmpf

Postby Matt Atkinson » Tue Dec 10, 2019 11:07 am

That's good to hear and interesting. I guess solidly gluing the bindings is important for tone? Does this mean wood bindings and plastic bindings have different effects on tone?
Matt Atkinson
 
Posts: 41
Joined: Fri Apr 18, 2014 2:35 pm
Location: New Hampshire

Re: Hmpf

Postby Barry Daniels » Tue Dec 10, 2019 12:24 pm

I don't know about that. There are so many other factors that influence tone. You would have to build two identical guitars except for the binding to see if it makes any difference. And that probably even wouldn't be definitive.
MIMF Staff
Barry Daniels
 
Posts: 2431
Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Hmpf

Postby Alan Carruth » Tue Dec 10, 2019 1:29 pm

Cutting the binding rabbets does two things; it loosens up the edge a bit, and opens a lot of air holes. I'm pretty sure its the leakage that has the most effect on the tap tone sustain, and the pitch, particularly for the 'main top' and 'main back' modes does drop. The 'main air' mode should rise in pitch with all the air leaks. Putting the bindings on stops up all the leaks, and replaces most of the lost stiffness, so you pretty much get back to where you were. I'm not sure there's any difference between plastic and wood binding: I only use wood.
Alan Carruth
 
Posts: 931
Joined: Sun Jan 15, 2012 1:11 pm

Re: Hmpf

Postby Clay Schaeffer » Wed Dec 11, 2019 11:00 am

I've read that violin purflings are lightly glued in place so the top acts as a "hinged" plate rather than one that is solidly glued. I'm not sure that having a well defined tap tone is what makes an instrument sound good. I made a guitar whose back tapped like tupperware. The finished guitar sounded very good. I would be curious to know what other people's thoughts are on this.
Clay Schaeffer
 
Posts: 1362
Joined: Fri Jan 06, 2012 12:04 pm

Re: Hmpf

Postby Alan Carruth » Wed Dec 11, 2019 12:58 pm

I think a well defined top tap tone is probably a good thing. Maybe not so necessary on the back: the top and back have different jobs, after all. A lot probably depends on why the tap tone is 'tight' or not.
Alan Carruth
 
Posts: 931
Joined: Sun Jan 15, 2012 1:11 pm


Return to Flat-Top Acoustic Guitars and Bass Guitars

Who is online

Users browsing this forum: No registered users and 7 guests

Your purchase from these sites helps support the MIMForum, but only if you start at the links below!!!
Amazon music     Amazon books     Amazon tools     Rockler tools     Office Depot    

The MIMF is a member-supported forum, please consider supporting us with a donation, thanks!
 • Book store • Tool store • Links •