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May 17, 2022 - 5:30:35 AM
Players Union Member

jduke

USA

1156 posts since 1/15/2009

David Holt’s banjo playing has inspired ever since his old PBS show Fire on the Mountain. I particularly like the sound of his Deering banjo. In a video for Deering, he describes the eleven by four-inch (deep) rim as a substitute in creating the tone of the older, larger minstrel banjo rims. I have thought about trying that concept in my next build.

I know I could never re-create the sound of David’s Deering, but the concept intrigues me. I one time built an (shorter than a usual A-scale) banjo that I tune to A. An eight-inch rim was the largest I could turn on my lathe, so I made it much deeper, and it gives the banjo a fuller, mellower sound than might be expected.

I was wondering if anyone here has experimented with rim depth?


 

May 17, 2022 - 5:42:41 AM

kd8tzc

USA

321 posts since 4/11/2022

Jeff, I would to see more of the banjo you created. Looks nice from the one picture but would love to see more.

May 17, 2022 - 7:02:33 AM
like this
Players Union Member

wizofos

USA

6294 posts since 8/19/2012

David Politzer on here did a pretty extensive study and experiment with various rim depths. Here is a link to his paper.

http://www.its.caltech.edu/~politzer/TheOpenBackOfTheOpenBack.pdf

May 17, 2022 - 7:07:10 AM
Players Union Member

jduke

USA

1156 posts since 1/15/2009

Here are a couple of closer photos and an MP3 of me playing Angeline the Baker. Considering its unique design and size, I was pleased with the way it sounds and plays.


May 17, 2022 - 7:11:35 AM
Players Union Member

jduke

USA

1156 posts since 1/15/2009

Glen, Thanks for the link. I'll have to look at it later. Time to go play some music at the Senior Center.

May 17, 2022 - 7:49:05 AM

1351 posts since 1/9/2012

This is sort of a follow-up from about three years later: http://www.its.caltech.edu/~politzer/rim-height.pdf .

The link Glen Wiz suggested was my first attempt at serious "banjo physics."  I've learned a lot over the years.  I post stuff when I think I've got at least some of it right at http://www.its.caltech.edu/~politzer/ .  The newest is on top.  There's a lot there at this point, but you might find something else of interest as well.  There are typically some sound samples, a lot of graphs, a few equations, and attempts at explanations in plain English.  I realize that much of it is not of general interest, but it keeps me happy.

May 17, 2022 - 8:30:51 AM

6923 posts since 9/21/2007

Now that is what I am talking about! Scoop all the way to the 7th fret!!!

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