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Author: Subject: Angle between body - neck? Please help
oudde
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[*] posted on 12-12-2009 at 03:00 PM
Angle between body - neck? Please help


Is it necessary to make an small angle (downwards) between the neck block and the neck, so when the strings apply their pressure will straighten the whole oud structure (like the long neck bouzoukis), and if yes, how many degrees would that be? Please help!:bowdown:

I was making arabic neys since now and i want to make my own oud
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Dr. Oud
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[*] posted on 12-13-2009 at 03:13 PM


The oud neck is much shorter than a long neck lute like bouzoikis or saz, so it does not bend with string pressure. There is negligable change in action before or after tuning the oud. The best way to check the angle of the neck is with a string through the bridge, over the top nut. There should be a clearance at the neck joint between 1/8 inch (4mm) and 3/16 inch (6mm).



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[*] posted on 12-14-2009 at 06:31 AM


As far as the behavior of the neck on oud Dr.Oud is correct. But 1/8 inch=3.175mm and 3/16 inch = 4.76 mm. I would prefere 2.5 mm. max.
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[*] posted on 12-14-2009 at 12:14 PM


Quote: Originally posted by oudmaker  
I would prefere 2.5 mm. max.


The 3mm action I have on my oud is the maximum I would accept ... I would prefer 2mm. 6mm are an absolute no-go in my opinion, though I often read, what Richard reported.

I vaguely remember, that I read anywhere, that the neck's end at the nut should be around 3mm lower than the top of the soundboard, when no strings are attached.

Is that correct?




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[*] posted on 12-15-2009 at 05:41 AM


It is wrong. Make your oud such a way that the neck will hold on its original posture under normal standard tuning. I consider to expect any movement on neck is not acceptable. That is the most important part of the oud building next to the sound of course.



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[*] posted on 12-15-2009 at 07:06 AM


Quote: Originally posted by oudmaker  
It is wrong.


Good to know, thanks.




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[*] posted on 12-15-2009 at 09:40 AM


Quote: Originally posted by Aymara  
...I vaguely remember, that I read anywhere, that the neck's end at the nut should be around 3mm lower than the top of the soundboard, when no strings are attached. Is that correct?

Actually, the height of the strings passing through the bridge will determine the angle of of the neck relative to the body. Without any strings, the top nut end of the neck will locate between 1mm and 3mm below the plane of the face. Without this setback, the height of the strings at the bridge will result in a high action. However, that is not the best way to measure the action, as the string holes in the bridge can change the result. Use a string tied on the bridge, preferably the first string so you can check the height as well as the side edge of the fingerboard.




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[*] posted on 12-15-2009 at 10:03 AM


Quote: Originally posted by Dr. Oud  
Without any strings, the top nut end of the neck will locate between 1mm and 3mm below the plane of the face.


I thought, this might be something like a rule of thumb, but the real action will also depend on the strings tension, which differs from one set to another.

I also read, that this neck angle is neccessary, to avoid the action rising too soon by a warping neck caused by the string's tension in combination with temperature or humidity changes.

At first sight, that sounded logical to me.




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[*] posted on 12-16-2009 at 01:00 AM


Thanks to all for replying.
So, the ouds soundboard with the fingerboard are aligned in a perfect line.
Correct or wrong??
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[*] posted on 12-16-2009 at 11:05 AM


Quote: Originally posted by oudde  
...So, the ouds soundboard with the fingerboard are aligned in a perfect line.
Correct or wrong??

If the fingerboard and face are in a perfect line, and you wish the action to be low, the strings at the bridge will be too close to the face to allow plucking without hitting the face. Raising the strings at the bridge for plucking clearance requires a set-back of the top of the neck to align the fingerboard with the string plane.
The neck rarely warps, it is usually the body bending.




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[*] posted on 4-6-2010 at 01:55 AM


Richard,
So we are back to the problem of how to adjust the "lean-back" of the neck, which Alfaraby says is no big deal.

Meanwhile most of the ouds I have played in the last few months would be perfectly usable ouds if not for the neck leaning too far forward causing a > 4.5 mm action or the strings being very low above the sound board. It's a rare oud that sounds good and plays well with that kind of action! ! Something like 8 out of 10 ouds are usable only as flower pots or student demoralizers right out of the gate or within a short time! That's absurd! If anyone can tell us how to quickly adjust that neck angle, they can really do some good!
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[*] posted on 4-6-2010 at 03:37 AM


Oudde,

Assuming that everything is in perfect line, soundboard, neck and neck join.
When opening the neck join (where the neck will fit), the opening must be lower at the front and higher at the back side , the difference could be between 0 and 1mm. this way when glueing the neck it will lean forward just a bit and after the strings are in place, the pressure line up everything to 0. but this always depends on many factors of courses, the wood used for the neck and neck join, is it quarter sawn? humidity etc...

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[*] posted on 4-6-2010 at 06:34 PM


There are two subjects here. Richard is pointing out that expecting the neck to flex is wrong. He is also recommending an action height that is a bit higher than several here present members find acceptable. I too prefer 2.5 mm.

So the big question is what to do if the oud has a high action, minor adjustments are insufficient, and there's not enough clearance above the soundboard to lower the bridge holes?

Alfaraby says he adjusts the neck angle routinely, and that it's "as simple as putting a coin into a machine". Can Alfaraby please help and explain briefly how he does it, so we can all have the action we want?

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[*] posted on 4-6-2010 at 11:54 PM


Quote: Originally posted by fernandraynaud  
So the big question is what to do if the oud has a high action, minor adjustments are insufficient, and there's not enough clearance above the soundboard to lower the bridge holes?


I thought, the standard routine would be to let a luthier exchange nut and bridge to achieve the desired action ... or am I wrong?




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[*] posted on 4-7-2010 at 12:49 AM


Unfortunately, you are wrong. Sketch it and you will see.

I have one oud that I have been scratching my head over for months, because I don't like its 4.5 mm action.

Lowering the strings by drilling new holes in the bridge has limits, as you can't work the risha comfortably too low over the soundboard. There is a limit and I'm trying to understand the limits of the compromises. It seems like if I really wanted a 2.5 mm action, I'd have to be whippin' my Faridism a couple millimeters above the soundboard!!!

Some bridges also have other structural or geometric limits. On my Syrian, for instance, the bridge is sloped, so lowering the holes shortens the scale, thankfully not significantly in this case.

Raising the nut goes hand in hand with raising the whole fingerboard. I had found a suitable Brazilian rosewood board to glue over the existing fingerboard and then realized that long fingerboards, like on my Sukar, are mounted a special way so as not to dampen the vibration of the soundboard. I think it was Sazi who told me about his bad experience gluing on a layer of soundboard: the tone changed.

Not using a loop but just tying a knot in the string, like a ball end, drops the action a little bit, and I'm doing that on another oud where that's sufficient.

So what else can we do? Show me! What can your luthier do by swapping bridges and nuts?

So here's the pattern: 1) many ouds have a tendency to high action 2) there is no way other than re-setting the neck angle to lower the action a couple millimeters without causing other problems and 3) unless we learn how to easily loosen and re-set a neck, an adjustable neck like on a Sukar is a necessity.

Oy
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[*] posted on 4-7-2010 at 02:37 AM


Quote: Originally posted by fernandraynaud  

Is there a pattern here?: 1) many ouds have a tendency to high action 2) there is no way other than re-setting the neck angle to lower the action a couple millimeters without causing other problems and 3) unless we learn how to easily loosen and re-set a neck, an adjustable neck like on a Sukar is a necessity.


I'll just re-arrange those first words... There is a pattern here... Which is why people like Ibrahim Sukar with his low-tech wing-nut system and Fadi Matta with his (only slightly) more complex locking system, have come up with, or utilise these solutions in the first place. Solutions that have almost become standard in guitar design over the years, and I'll stick my kneck out here... hopefully will become more common on ouds. And to those who complain about changes to the oud ...- if we were to be stuck in tradition we would all be playing 4 course gut strung ouds, there'd be no floating bridges or 7 courses , and Naseer Shamma might be out of a job! ;) Selaam

There is no simple "coin in the slot" method (yet;)) you either slice off the neck with a razor saw and adjust the face angle very slightly, and then re-drill the hole for the new angle of the dowel, yoiks! it sounds drastic!, but I have done it before and was happy with the result, it made an unplayable instrument very satisfying to play, and was done in a day.

Hmm, it doesn't have to be quite that drastic... I loosened the joint with heat and steam and only had to cut off the dowel... but if you have a dovetail joint it may be harder to loosen the neck as it would be glued right through the neck block and to the soundboard.

Or you come up with some form of adjustment, the simplest perhaps being the "knockdown" fitting of a threaded rod embedded in the neck with a corresponding bolt threaded into it from the inner face of the neck-block.

Not quite as simple as putting a coin in the slot:rolleyes: but perhaps worth the effort on an otherwise perfect oud, THEN the adjustment would be as simple as putting a coin - allen key into a slot;)
.




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[*] posted on 4-7-2010 at 09:24 AM


Quote: Originally posted by Sazi  
if we were to be stuck in tradition we would all be playing 4 course gut strung ouds, there'd be no floating bridges or 7 courses , and Naseer Shamma might be out of a job! ;) Selaam


Great argumentation :applause:




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[*] posted on 4-7-2010 at 12:58 PM


If what traditionalists say were true, the landscape wouldn't be littered like the aftermath of Waterloo with ouds unusable only because of high action and/or bad pegs. If hiding 3 small pieces of metal in the neck joint can do so much with such discretion, I vote for it. Maybe someone cares to design an all-wood resettable neck? Like using a little sloped wedge?

And the pegs? Here too, discretion. We leave gears to robots. Planetary Invisibly-geared Perfection Pegs cost $250 for 12. Ouch!!! Gotoh pegs are friction-based (you regulate with a hex screw), use non-tapered holes (huge advantage), cost about $100 for 12. And hard to get. Beautiful rosewood or ebony violin or viola pegs can be found at $4 for 4. They have a 30:1 taper while typical oud and lute pegs aim for 16:1. It seems many modern oud makers already use 30:1 pegs. Am I mistaken? Can someone send a container full of reamers to Aleppo, Cairo, Damascus, etc?
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[*] posted on 4-8-2010 at 12:21 AM
And Aluminum Pegs?


About the reamers I was being sarcastic, as i can't fathom why most oud pegholes don't fit their pegs at all.

We had collectively wondered about Gotoh aluminum pegs a few months ago. I just spoke to the man who was going to distribute them. These are less than half the price of Perfection Pegs, look great, and .... don't hold. By the time the Japanese had improved them the damage to their reputation was done, so the distributor gave up. I'm going to try to get a set of the latest design from Tokyo to try.

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[*] posted on 4-8-2010 at 03:10 AM


Just a quick 2.2 cents worth... aluminium pegs could be worse than you think ebony pegs are, unless the oud never leaves a controlled environment, as it expands and contracts quite a lot with temperature fluctuations... (the reason why you don't see aluminium tuning forks) ...if they got cold they would slip, and if they got hot... I'd hate to come home to a split pegbox.

Oh that's right y'all say aluminum, sorry, we spell it different here...;)




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[*] posted on 4-8-2010 at 04:24 AM


Tony, I am no oud maker. But I have lowered the action on some of my previous "performance" ouds.

p.s. That is one reason why I "converted" to Sukar :)

What I did is simply to sand down the finger board "AT AN ANGLE"! that is, I sand more the closer I get to the nut.

And it works PERFECTLY! I am sure you can do it better than me :)

Of course, there will be a limit as to how much you can do it, but with your 4,5mm, I don't think there will be a problem!

And of course, you will have a big problem if the fingerboard has inlay. But luckily for me, I love SIMPLE ouds :)

What do you think?











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[*] posted on 4-9-2010 at 12:14 AM


Sazi: the aluminum pegs have their own friction mechanism. They look like normal pegs but sit in untapered holes. You drill out the tapered holes with a normal drill (I think 10 mm), and insert the bushings with the pegs. An allen screw adjusts the pressure on each peg's slip-clutch. Nothing moves against the pegbox walls. The Perfection Pegs use a planetary gear mechanisms hidden in what looks like ebony pegs, and the Gotohs use an adjustable slipclutch (and are much cheaper). I am in touch with the manufacturer and hope to test some soon.

Luttgutt, you sneaky oudomaniac! That's probably a VERY good way to gain a millimeter or two if we have the "spare neck material". There are two ouds on which I would like to lower the action, one has inlays and edging, I can't imagine a way to shave the neck without ruining it. The other has a veneer fingerboard that likely I can unglue and then put back on, or glue on a new one. Let me do the sketches and look into it. Adjustable necks seem better, we agree, but this fix is definitely worth knowing about! Did you do this best with sandpaper, a file, a plane, a sanding block, what?
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[*] posted on 4-9-2010 at 03:05 AM


Ahh, ok, thanks, that sounds really interesting, are they 1:1 ratio?. I'd be keen to hear your opinion of them, they sound like a Good Thing!



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[*] posted on 4-9-2010 at 03:44 AM


No question the Perfection Pegs with their 4:1 invisible gears are nicer, but they cost $80+ for 4. A luthier quoted me $600 to upgrade an oud. Apparently many high end violin-makers are adopting them.

The Gotohs are 1:1 but 12 (3 sets of 4) should cost under $100 and they are easier to install. They have recently redesigned them. I'll let you know if/when they reply, I'm luring them with a big new market.
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[*] posted on 4-9-2010 at 05:51 AM


Luttgutt you saved my Syrian Sleeper! It is so happy it is jumping up and down making Ajam ! :bounce:
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