Welcome to the Piano World Piano Forums
Over 2 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Gifts and supplies for the musician

SEARCH
the Forums & Piano World

This custom search works much better than the built in one and allows searching older posts.
(ad) Yamaha CP4 Rebate
Yamaha CP4 Rebate
(ad) Pianoteq
(ad) Pearl River
Pearl River Pianos
(ad) P B Guide
Acoustic & Digital Piano Guide
(ad) Lindeblad Piano
Lindeblad Piano Restoration
Who's Online
105 registered (Almaviva, Aceituna, Anne'sson, albumblatter, 31 invisible), 1287 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
(ad) Estonia Piano
Estonia Pianos
Quick Links to Useful Piano & Music Resources
Our Classified Ads
Find Piano Professionals-

*Piano Dealers - Piano Stores
*Piano Tuners
*Piano Teachers
*Piano Movers
*Piano Restorations
*Piano Manufacturers
*Organs

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano & Music Accessories
*Music School Listings
* Buying a Piano
*Buying A Acoustic Piano
*Buying a Digital Piano
*Pianos for Sale
*Sell Your Piano
*How Old is My Piano?
*Piano Books
*Piano Art, Pictures, & Posters
*Directory/Site Map
*Contest
*Links
*Virtual Piano
*Music Word Search
*Piano Screen Saver
*Piano Videos
*Virtual Piano Chords
Topic Options
#1182140 - 04/17/09 10:21 AM Stupid question about damper felt design...
Little_Blue_Engine Offline
1000 Post Club Member

Registered: 03/30/09
Posts: 1257
Loc: Ohio, US
I've been replacing the worn damper felt on my upright a little at a time and was wondering why the bass dampers normally have two shorter wedges of felt instead of one longer one. I don't mean my piano individually, just uprights in general. Are two smaller pieces more effective at stopping the vibrations than one large one? If so is it because two smaller pieces are better able slide into place and "cuddle up" with the strings better than one large piece? Or is it because the strings are being touched in more than one place? Combinatin of both? Does the distance between the two wedges make a difference (I noticed my dampers are slightly longer than newer pre-made dampers) or are minor variations in length in an older piano just the result of less standardization in piano design between different manufacturers? As I mentioned, not asking about my specific piano and I'm not trying to redesign anything either. I'm just curious.
_________________________
I'll figure it out eventually.
Until then you may want to keep a safe distance.


Top
(ad 568) PTG Convention 2015 Denver
PTG Convention July 15 to 18 Denver
#1182150 - 04/17/09 10:37 AM Re: Stupid question about damper felt design... [Re: Little_Blue_Engine]
JDelmore Offline
500 Post Club Member

Registered: 04/10/07
Posts: 634
The vibrational nodes of the longer strings are further apart than on shorter ones. If the dampers worked well before, you should replace them exactly. If there were problems, i.e. odd harmonic ringing, that can be addressed, sometimes with "outrigger" dampers.
_________________________
PTG Associate Member

"There is always room above; there is only the ground below."....F.E. Morton (with props to Del F.)

Top
#1182181 - 04/17/09 11:38 AM Re: Stupid question about damper felt design... [Re: JDelmore]
BDB Online   content
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 22283
Loc: Oakland
The wedges are short for the same reason the treble felt is compressed in the center: they make less noise when they touch the string.

I would not worry about slight differences in the size of the dampers. Manufacturers used what was available from their suppliers, too.
_________________________
Semipro Tech

Top
#1182201 - 04/17/09 11:58 AM Re: Stupid question about damper felt design... [Re: BDB]
Silverwood Pianos Offline
4000 Post Club Member

Registered: 03/10/08
Posts: 4263
Loc: Vancouver B. C. Canada


You can obtain longer dampers if you require them. Most of the generic replacements for older uprights are not as long as the originals.

I just had a problem with a very strong Heintzman (volume) and the regular generic replacements were not satisfactory. Too much bleed through, so I got these from Germany with the assistance of Jurgen Goering at Pianoforte Supply…..see photo….

http://picasaweb.google.com/silverwoodpi...689136902701410
_________________________
Dan Silverwood
www.silverwoodpianos.com
http://silverwoodpianos.blogspot.com/
http://www.facebook.com/SilverwoodPianosDotCom
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur."

Top
#1182343 - 04/17/09 03:46 PM Re: Stupid question about damper felt design... [Re: Silverwood Pianos]
Little_Blue_Engine Offline
1000 Post Club Member

Registered: 03/30/09
Posts: 1257
Loc: Ohio, US
I like those triple wedged dampers! I've learned from experience working on old houses that sometimes things are done differently for a reason, even if it's not obvious. Mess with it too much and you find out the reason real quick eekso when I noticed the length difference I decided to use the origional dampers and just put new felt on them even though it takes more time and doesn't have that "shiny new" look. They're just long enough that a third wedge would fit in the middle with some space around it and I actually thought about doing that when I was working on them last night but wasn't sure if I should. I may go back and add a third wedge to a few of them and see what kind of difference it makes.
_________________________
I'll figure it out eventually.
Until then you may want to keep a safe distance.


Top
#1182346 - 04/17/09 03:48 PM Re: Stupid question about damper felt design... [Re: Little_Blue_Engine]
BDB Online   content
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 22283
Loc: Oakland
If you want more damping, adding weight to the damper block would probably do more than adding more felt. But be certain that is what you want. Too much damping makes the piano sound dry.
_________________________
Semipro Tech

Top

Moderator:  Piano World 
Shop our Store for Music Lovers!
PianoSupplies.com is Piano World's Online Store
Please visit our store today.
circle of 5ths coaster
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
(ad) Hal Leonard Teacher VIP
Hal Leonard Teacher VIP Your Source for Piano Music
Ad (Seiler/Knabe)
Knabe Pianos
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
New Topics - Multiple Forums
What happened to Polyphonist?
by JoelW
Yesterday at 10:45 PM
Sohmer Upright piano model 34A
by dbf
Yesterday at 09:25 PM
A long over due update...
by Les Koltvedt
Yesterday at 09:04 PM
Piano Movers Tightened a Leg Bolt too Tightly
by pianoman9
Yesterday at 08:17 PM
descending thirds with right hand
by pianu_reeves
Yesterday at 06:40 PM
What's Hot!!
Trade Regrets: Gary Trafton - Piano Rep
--------------------
Historic Piano Documents
--------------------
Posting Pictures on the Forums
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

The world's most popular piano web site.
-------------------
PIANO BOOKS
Forum Stats
78,727 Registered Members
43 Forums
162,896 Topics
2,390,944 Posts

Most users ever online: 15,252 @ 03/21/10 11:39 PM
Sheet Music Plus (125)
Sheet Music Plus Featured Sale

Visit our online store for gifts for music lovers

 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
|
Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World | Donate | Link to Us | Classifieds |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | Press Room |


copyright 1997 - 2015 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission