Ukulele bracing bridge and piezo questions

If it's not a guitar or a bass guitar discussion, and it's got strings, put it here.

Ukulele bracing bridge and piezo questions

Postby Steve Senseney » Sun Feb 05, 2012 1:16 pm

I am progressing on a pair of bass uke builds.

These will have the black polyurethane strings. The bridge on the commercial products look as if the bridge is much beefier, has more gluing surface, and is located further from the sound hole.

The concept of the surface mounted piezo is to pick up body vibrations.

The concept of a underbridge mounted piezo is to pick up string vibrations.

Since the piezo is producing most or all of the sound, should I put in a really heavy bracing? Use a heavy bridge plate? Ignore any sound from the body?
Steve Senseney
 
Posts: 673
Joined: Fri Jan 06, 2012 2:45 pm

Re: Ukulele bracing bridge and piezo questions

Postby Jens Poulsen » Mon Feb 06, 2012 5:15 pm

The Pahoehoe strings are rather low-tension, so you don't need to beef up anything. It will be worthwile to strive for a decent non-amplified sound, I converted an existing baritone 'uke into a bass, and it is certainly loud enough for practicing.
Jens Poulsen
 
Posts: 4
Joined: Fri Feb 03, 2012 10:04 am

Re: Ukulele bracing bridge and piezo questions

Postby Steve Senseney » Mon Feb 06, 2012 6:15 pm

Thanks.

While I have your help, what did you do for compensation on the strings?
Steve Senseney
 
Posts: 673
Joined: Fri Jan 06, 2012 2:45 pm

Re: Ukulele bracing bridge and piezo questions

Postby Jens Poulsen » Mon Feb 06, 2012 6:49 pm

A quick job with a ruler says: going gradually from about 8 mm compensation for the E string to about 4 mm for the G string.
If you stray to the forum at ukuleleunderground, you can search for a couple of threads about u-bass conversions (including my humble efforts).
I'll give you a more thorough answer tomorrow (bedtime in this part of the world).
Jens Poulsen
 
Posts: 4
Joined: Fri Feb 03, 2012 10:04 am

Re: Ukulele bracing bridge and piezo questions

Postby Jens Poulsen » Tue Feb 07, 2012 6:33 pm

So here is the result of a more thorough measurement: Scale length 48.7 cm + 9 mm for E, 8 mm A, 6 mm D and 5 mm G (give or take a mm, as the rounded saddle makes it a bit difficult to see precisely where these fat strings touch).
Jens Poulsen
 
Posts: 4
Joined: Fri Feb 03, 2012 10:04 am

Re: Ukulele bracing bridge and piezo questions

Postby Steve Senseney » Tue Feb 07, 2012 6:39 pm

Thanks! I appreciate your help.

I have a couple of busy days ahead of me (day job!). I won't be able to do much for a while.
Steve Senseney
 
Posts: 673
Joined: Fri Jan 06, 2012 2:45 pm


Return to Other Stringed Instruments

Who is online

Users browsing this forum: No registered users and 2 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 •