Re: [Harp-L] Chromatic and Diatonic harp volume....

[Joseph Leone <3n037@xxxxxxxxxxx>]

On Feb 26, 2012, at 3:02 PM, Vern wrote:

> Because a slide must have some clearance to work, the chromatic has a source of leakage not present in the diatonic.  As the precision of the slide increases, for instance in the Renaissance or Saxony, the loudness of the chromatic approaches that of the diatonic.

AND, with a diatonic, you are standing closer to the reeds. 
> 
> You can greatly improve the loudness and responsiveness of a 270 by shaving/filing the U-channel of the slide to reduce the clearance to about .002" This is a tricky procedure but several harmonica techs can do it for you.  It is described in Tate's and Schackner's books.   As they come from the factory, slide clearances in the 270 vary from about .004" to .007."  IMO, this is the only effective modification for improving the performance of the 270.

I guess this is because the factory assumes that people won't keep the slides as free as they should. Closing up the clearance requires a spiffy clean (and flat) slide. 
> 
> I believe that it is not the leakage of breath that affects loudness. I think that the leakage dampens the resonance of the player's embouchure.  In very simple terms it is not so much the loss of air as it is the loss of the sound.

Yes, it's like the difference between turning on a faucet only part way with 22 lb of pressure in the line and turning it on all the way with 14.7 lb of pressure. The leakage drops the pressure...hence less force. Less water force (less air to the reed) and you don't get the dishes as clean (sound as loud).   
> 
> While water fills the clearances of a wet slide, you notice an improvement in loudness and responsiveness that you would like to keep.  Alas, it goes away as the slide dries out.

I carry a tiny (eye drops) bottle of H2O. I will use it several times on my slides tonight. H2O seems to work better than H2SO4. lolol 

Like Bullfrog, I also have a rebuilt by Romel. It is louder than it was when new. That's because the slide cage (or over bridger) was reduced...as Vern explains. 
smo-joe       Hippos kill more people than cows....eat more Hippo. 




> 
> Vern
> 
> On Feb 26, 2012, at 11:25 AM, Mike Rogers wrote:
> 
>> M
>>  My favorite chromatic is an old Hohner 280, that Bill Romel restored for me several years ago.  I find it as loud as any of my diatonics and louder than the rest of my chromatic collection.
>> 
>> Bullfrog
>> ----- Original Message ----- From: "Doug Schroer" <dougharps@xxxxxxxxx>
>> To: "Harp-l for posting" <harp-l@xxxxxxxxxx>
>> Sent: Sunday, February 26, 2012 1:54 PM
>> Subject: [Harp-L] Chromatic and Diatonic harp volume....
>> 
>> 
>>> In my opinion, single notes on a chromatic are quieter than diatonic.  I
>>> think that chromatic is as loud or louder IF you are playing octaves.
>>> 
>>> Doug S.
>> 
> 
> 
>