[Trombone-l] Duo Gravis modification

Eric Edwards eric at elsjledwards.net
Fri Nov 25 18:30:22 CST 2005

 Hi Earl, I believe it would be more trouble to try to articulate both
paddles this way.
You're better off doing an independent thumb-middle finger paddle set-up.
My first bass was also a Duo Gravis and I was always getting cramps,  but I
was too young to think about any kind of mods.

And Stephen,  I think you would also benefit from this type of arrangement
for the levers along with the Greenhoe brace.
If Todd can't help, please feel free to give me a call or e-mail.

But in both cases, I would definitely keep the string linkage,  makes for a
much shorter throw.


-----Original Message-----
From: trombone-l-bounces at samford.edu [mailto:trombone-l-bounces at samford.edu]
On Behalf Of Earl Needham
Sent: Friday, November 25, 2005 4:07 PM
To: TROMBONE-L at server5.samford.edu
Subject: Re: [Trombone-l] Duo Gravis modification

At 03:00 PM 11/25/2005, stjones at umbc.edu wrote:
>Today I becamse the proud owner of a Duo Gravis.  I was completely amazed
>by the horn.  I don't think I've ever played such an open horn, tenor or
>The valves are also excellent, functionally, but the way the paddles
>controlling them  is set up is very difficult to use.  I know I"m not the
>first person to face this.  Anyone have any pictures or descriptions of
>what they've done to make the set up easier to use?  I have a Greenhoe
>brace on the way, which I hope will help.  I have normal to small hands.
>I'm going to have Todd Klontz take a look at it and make some suggestions.

         I've considered this for some years, but I've never done anything 
about it.  I suppose the "quick and dirty" method would be to have a piece 
of square stock (maybe 1/8" square or so) soldered on the D paddle so it 
would also push the F paddle at the same time.  That would probably take a 
lot of the effort out of playing the horn.


Earl Needham, KD5XB, Clovis, New Mexico DM84jk

Looking for one MasterMobile 20-meter coil (might say "Davis Electronics" on

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