Ken's Corner (Bass Forums Sponsored By KSB)

Go Back   Ken's Corner (Bass Forums Sponsored By KSB) > Double Basses > Luthier's Corner

Reply
 
Thread Tools Display Modes
  #1  
Old 11-23-2014, 07:54 PM
Mark Stefaniw Mark Stefaniw is offline
Junior Posting Member
 
Join Date: 01-31-2010
Location: Evergreen, CO
Posts: 7
Mark Stefaniw is on a distinguished road
Default Bridge leg placement over bass bar

What is the conventional thinking on how the bridge leg should be positioned over the bass bar? Centered? Half the bar thickness narrower?

I'm contemplating a new bridge for my big Romanian flatback (42" scale). Currently the bridge leg is well inside the CL of the bass bar. See attached images for measurements.

If I center the leg over the bass bar, than the toes will likely over hang the f-hole eyes.
Attached Thumbnails
Click image for larger version

Name:	DCP_2350.JPG
Views:	253
Size:	853.2 KB
ID:	3073  Click image for larger version

Name:	Gyorgi bridge.JPG
Views:	431
Size:	964.7 KB
ID:	3074  
__________________
Mark Stefaniw, Bassist
Low-C Double Bass Studio

www.MarkStefaniwMusic.com
303-679-4437
Reply With Quote
  #2  
Old 11-23-2014, 08:54 PM
Ken Smith's Avatar
Ken Smith Ken Smith is offline
Bassist, Luthier & Admin
 
Join Date: 01-18-2007
Location: Perkasie, PA
Posts: 4,995
Ken Smith is on a distinguished road
Default

The center leg over the bar places the outer foot edge closer to the f-hole eye. For healther basses I think this is ok but some like the bridge foot edge just over the inner edge of the bar or half way in to vibrate the bar from the inner edge/half. Is the foot edge is inside the inner edge of the bar, you can crack the bass right there. All the pressure without out support.

usually the width between the inner f-hole eyes determines the width of the bridge's outer feet. So, is it is 155mm, the you get a 155mm bridge +/- 5mm.. Or something like that.

The sound changes as well by this width as well as the soundpost placement. Also, not all bassbars are placed exactly in their optimum placement for a particular bass.
Reply With Quote
  #3  
Old 11-23-2014, 10:02 PM
Arnold Schnitzer Arnold Schnitzer is offline
Senior Posting Member
 
Join Date: 01-22-2007
Location: Putnam County, NY
Posts: 453
Arnold Schnitzer is on a distinguished road
Default

The general rule of thumb is that the bridge foot should overhang the outer edge of the bass bar 5 to 10mm. Some makers and repairers don't fully understand the bass bar/ bridge/ f-hole relationship, and so there are situations where this does not really work because of a mis-located bass bar or overly narrow f-hole placement.
Reply With Quote
  #4  
Old 11-25-2014, 05:47 AM
FrankDeets's Avatar
FrankDeets FrankDeets is offline
Junior Posting Member
 
Join Date: 11-05-2014
Location: Lyon, France
Posts: 15
FrankDeets is on a distinguished road
Send a message via Skype™ to FrankDeets
Default

also, great pictures!
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 01:00 PM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2007 - Ken Smith Basses, LTD. (All Rights Reserved)