Re: [Harp-L] Seydel Repair Options

[Vern <jevern@xxxxxxx>]

> Your conclusion is true but I disagree with the reason that you give: "This is because people have a tendency to..once they have reached the lowest level they need to remove the scratches, will tend to ease off the rest of the length.


An amount of thickness removed from the part of the reed that bends near the rivet will lower the pitch much more than the same amount removed at the tip will raise the pitch.  That is because the stiffness near the rivet is related to the third power of thickness and the mass of the tip is related to the first power of thickness.

There is no reason to polish near the tip because reeds don't bend or crack there.

Vern


On Nov 11, 2013, at 2:06 PM, Joseph Leone <3n037@xxxxxxxxxxx> wrote:

> In a word ...yes. Most of the scratches are at the roots of the reeds. About the 30% mark. Once you polish those out, the root is thinner and the pitch will have gone DOWN. So Mr. Jones' method has high credibility.  Even if you polish the full length of the reed, the pitch will STILL go down. This is because people have a tendency to..once they have reached the lowest level they need to remove the scratches, will tend to ease off the rest of the length. At least that was my experience. 
> 
> smo-joe
> 
> On Nov 11, 2013, at 12:47 PM, Vern wrote:
> 
>> 
>> On Nov 10, 2013, at 9:59 PM, Greg Jones <greg@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>> 
>>> 
>>> …..Either way, I feel safe saying it does not shorten reed life and since I charge the same whether the reed is polished or unpolished, it is not a pricey gamble but rather a no lose transaction for the customer…...
>>> 
>> Like chicken soup…it couldn't hurt. 
>> 
>> Does polishing change the pitch?
>> 
>> Vern
>> 
>> 
>> 
>> 
>> 
>