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Aug 11, 2017 - 11:20:36 AM

RichJ

USA

193 posts
Joined Aug 6, 2013

While sound posts are still on my mind from a recent FH post, and also ordering some sound post stock, wondering what most of you guys consider an appropriate diameter.

Checked with International Violin and they suggest 6.2 mm for a 4/4 and 5.6 mm for a 3/4.

Any thoughts?

Notice - I'm not asking how sound post diameter affects sound, but this will likely get into the thread pretty quick.

Aug 11, 2017 - 2:43:03 PM

771 posts
Joined Jun 26, 2007

The 6.2 is pretty middle-of-the-road. For a 3/4, 5.6 might be slightly small but is unlikely to hurt the typical 3/4. Probably the result of some common machining capability. I've made several 3/4s and used 6 mm posts. Worked fine for my model. I make my own posts, sometimes from the front scraps.

Edited by - captainhook on 08/11/2017 14:44:09

Aug 11, 2017 - 3:14:37 PM

RichJ

USA

193 posts
Joined Aug 6, 2013

quote:
Originally posted by captainhook
 

The 6.2 is pretty middle-of-the-road. For a 3/4, 5.6 might be slightly small but is unlikely to hurt the typical 3/4. Probably the result of some common machining capability. I've made several 3/4s and used 6 mm posts. Worked fine for my model. I make my own posts, sometimes from the front scraps.


I've thought of making my own. How difficult is it?

Aug 12, 2017 - 4:54:40 AM

kjb

USA

452 posts
Joined Jun 8, 2013

make a jig , you can look up I would think , not that hard. 

Aug 12, 2017 - 8:27:05 AM

RichJ

USA

193 posts
Joined Aug 6, 2013

What I really meant to say was: Is it worth the time and effort when you can purchase a years supply for a few bucks?

Edited by - RichJ on 08/12/2017 08:27:43

Aug 12, 2017 - 8:40:17 AM

Forest

USA

70 posts
Joined Nov 5, 2011

I ordered these sound posts on Ebay from China, they are .249-.250 inch in diameter.

http://www.ebay.com/itm/5pcs-great-spruce-violin-soundpost-high-quality-violin-soud-post-/201991778106?hash=item2f07a5ef3a:g:AXsAAOSwd4tUHTse

Aug 12, 2017 - 9:22:28 AM

RichJ

USA

193 posts
Joined Aug 6, 2013

quote:
Originally posted by Forest
 

I ordered these sound posts on Ebay from China, they are .249-.250 inch in diameter.

http://www.ebay.com/itm/5pcs-great-spruce-violin-soundpost-high-quality-violin-soud-post-/201991778106?hash=item2f07a5ef3a:g:AXsAAOSwd4tUHTse


Yikes! 50 posts for a buck and free shipping.

Is 6.3 mm a bit on the thick side?

 

At that price it's got to be worth a shot but arn't they a bit on the "thick" side?.

Aug 12, 2017 - 1:30:19 PM

5913 posts
Joined Mar 19, 2009

I don't know much about sound posts, but isn't the fit more important then the diameter?

Aug 12, 2017 - 2:37:39 PM

2028 posts
Joined Dec 23, 2007

I agree, Lee.  OP is overthinking things.  6.2 from IVC is only .1mm off from the other link.  1/10th of a mm is incredibly small, and is unlikely to affect anything.  Wood and fit are much more likely to affect tone than a miniscule bit of extra wood.  

 

head of a pin = 1-2mm.  So we're talking about literally 1/10-1/20 of a pinhead.  Irrelevant for most fiddles and players. Maybe all fiddles and players.

Aug 12, 2017 - 3:23:19 PM

771 posts
Joined Jun 26, 2007

quote:
Originally posted by RichJ
 

What I really meant to say was: Is it worth the time and effort when you can purchase a years supply for a few bucks?


Probably not, for you at least. I always have lots of scrap spruce and prefer to have posts that are split out both directions so that I know the grain is truly straight. Does it really matter? Maybe only to me and a few others. I also like to use finer grain posts than you can buy. There are several approaches to making them but for just one planing is probably quickest.

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