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!

SEARCH
the Forums & Piano World

This custom search works much better than the built in one and allows searching older posts.
(ad) Pianoteq
Latest Pianoteq add-on instrument: U4 upright piano
(ad) Pearl River
Pearl River Pianos
(ad) P B Guide
Acoustic & Digital Piano Guide
PianoSupplies.com (150)
Piano Accessories Music Related Gifts Piano Tuning Equipment Piano Moving Equipment
We now offer Gift Certificates in our online store!
(ad) Estonia Piano
Estonia Piano
Quick Links to Useful Stuff
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 Accessories
* 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
#606734 - 02/17/05 10:26 AM Pulsating, Wavering, Undulating Strings
Anonymous
Unregistered


I'm sure this is a well-worn question, but I'll ask it anyway. How in the world do you get rid of a bunch of false beats in the upper strings of a 100 year-old upright?

Trying to tune three strings together is next to impossible. Each string is a wavering, pulsating, undulating piece of steel wire. Itís crazy.

Top
(ad 568) Win a Year Journal Subscription
Win a year subscription to the PTG Journal
#606735 - 02/17/05 11:18 AM Re: Pulsating, Wavering, Undulating Strings
Piano Guy Offline
Full Member

Registered: 07/01/03
Posts: 400
Loc: Southern Ontario,Canada
You need to look at the bridge in the upper treble. Check for cracking along the bridge pin line. If no cracks try a small brass rod and try and seat the offending strings tightly on the bridge. Check for adequate side bearing. You might have to repair the crack and re-set the bridge pins. Are you experianced??
_________________________
Richard, the"Piano Guy"
Piano Moving Tuning & Repair
From London ON to Fort Erie ON

Top
#606736 - 02/17/05 12:26 PM Re: Pulsating, Wavering, Undulating Strings
JIMBOB Offline
1000 Post Club Member

Registered: 11/18/02
Posts: 1323
Loc: South Carolina
How is the tuning pin torque ? You may be fighting a losing battle if the pin torque is under 48 inch lbs. What about the tuning pin height and condition of the strings and hammers ?
In the end you may need to replace the strings but some light hammer filing and shaping may help. You may want to try replacing a few strings to see what happens. Make sure you mic the strings to make sure you have the right gauge.
_________________________
Certificate in Piano Technology
Associate Member PTG
Yamaha & Petrof/Nordiska Training
Dampp-Chaser System Installer
Certified Pianomation Installer

Top
#606737 - 02/17/05 12:53 PM Re: Pulsating, Wavering, Undulating Strings
Brian Lawson, RPT Offline
500 Post Club Member

Registered: 07/04/01
Posts: 647
Loc: South Africa
Also, put some CA glue on the bridge pins, as it is a 100 year old piano. Maybe a few applications, then drop each string slightly to break any glue between the string, bridge & pin.
_________________________
Brian Lawson, RPT
Johannesburg
South Africa

http://www.lawsonic.co.za

Top
#606738 - 02/17/05 02:06 PM Re: Pulsating, Wavering, Undulating Strings
Larry Buck Online   content
2000 Post Club Member

Registered: 10/27/04
Posts: 2314
Loc: Lowell MA
Hi Rod,

Old strings or strings of poor quality can have this charactaristic.

After you have checked the bridge for damage, seated the strings into the bridge (excessive need for seating can point to bearing issues), you can check for sympathetic interference by muting off the strings between the bridge and hitch pins.

Beyond that, it is not uncommon for the strings to be just plain.....bad.

This can be checked by replacing a couple as to get three new unisions.

If it tunes cleanly.....there it is.

Once again, it is a common problem in old uprights and uprights of poorer quality for the the strings to have "false beats"
_________________________
Has Anyone Seen My Glasses ?

E. J. Buck & Sons
Lowell MA 01852
978 458 8688
www.ejbuckpiano.com
www.finepianodevelopment.com

Top
#606739 - 02/18/05 06:47 AM Re: Pulsating, Wavering, Undulating Strings
Keith Roberts Offline
1000 Post Club Member

Registered: 05/04/04
Posts: 1984
Loc: Murphys, Ca
The bridge pins, tap them down. A drop of CA glue.

kpiano
_________________________
Keith Roberts
Associate, PTG
Keith's Piano Service
Hathaway Pines,Ca

Top
#606740 - 02/18/05 09:19 AM Re: Pulsating, Wavering, Undulating Strings
BDB Offline
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 20766
Loc: Oakland
You need to learn how to tune imperfect strings. Life is not as neat as you would like.
_________________________
Semipro Tech

Top
#606741 - 02/19/05 09:28 AM Re: Pulsating, Wavering, Undulating Strings
Sam Casey Offline
1000 Post Club Member

Registered: 02/05/05
Posts: 1135
Loc: SW Missouri
Think first of the dollar-value ratio. You've got a $50 piano. In the customer's best interest how much should they invest in dinking around with bridges, pressure bars, flattend strings etc.? Hammers are probably worn to the wood, bearing uneven, bridge wedged against the plate, board cracked in a zillion places, block weak and a half step flat. Maybe brass flanges to boot and bass that sounds like a washtub. False trebles are the least of anybody's problems.

Top
#606742 - 02/19/05 07:58 PM Re: Pulsating, Wavering, Undulating Strings
Nauvoo Offline
Full Member

Registered: 02/19/05
Posts: 20
Loc: Atlanta
Excellent counsel! Very good! Itís always smart to weigh the cost and effort versus the value of what you have in the first place. Balance! Sometimes the smart play is to simply walk away from it.

Top
#606743 - 02/19/05 10:10 PM Re: Pulsating, Wavering, Undulating Strings
BDB Offline
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 20766
Loc: Oakland
I think Rod is trying to learn how to service pianos. In that case, restringing his piano is a good way to learn a lot of techniques which he will need. It's better for him to learn on his piano than to inflict himself on someone else's with no experience at all. As a matter of fact, it would be worthwhile for him to do as much work as he can, as carefully as he can, on three or four pianos. Otherwise, sending him out to work on other people's pianos would be as bad as sending students to a teacher who had never learned to play anything more than Chopsticks.
_________________________
Semipro Tech

Top
#606744 - 02/20/05 09:10 AM Re: Pulsating, Wavering, Undulating Strings
Sam Casey Offline
1000 Post Club Member

Registered: 02/05/05
Posts: 1135
Loc: SW Missouri
Semipro

I agree completely. I assumed the piano in question was a customers in which case the bigger picture should be considered.

What would be good too, along with working on the clunkers at home is to work with a dealer where there are lots of different pianos in various states. There you can get a feel of the business end as well as technical.

Top

Moderator:  Piano World 
What's Hot!!
HOW TO POST PICTURES on the Piano Forums
-------------------
Sharing is Caring!
About the Buttons
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

The world's most popular piano web site.
-------------------
PIANO BOOKS
Interesting books about the piano, pianists, piano history, biographies, memoirs and more!
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
Sheet Music
(PW is an affiliate)
Sheet Music Plus Featured Sale
Download & Print Sheet Music Instantly
sheet music search
sheet music search

sheet music search
(ad) HAILUN Pianos
Hailun Pianos - Click for More
(ad) Lindeblad Piano
Lindeblad Piano Restoration
Who's Online
128 registered (Alkanaut, accordeur, Almaviva, 45 invisible), 1370 Guests and 49 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
74256 Members
42 Forums
153602 Topics
2251228 Posts

Max Online: 15252 @ 03/21/10 11:39 PM
New Topics - Multiple Forums
Action regulating
by pater57
Today at 08:59 AM
Kurzweil SP5-8 as main studio keyboard/stage piano
by Barty
Today at 08:33 AM
Greg Pauley in Concert June 1st, Sunday 3:30pm
by Larry Buck
Today at 07:58 AM
Happy Easter!
by Marko in Boston
Today at 06:58 AM
Easter Themed Recordings - Kawai CA95
by wolferblade
Today at 04:55 AM
(ads by Google)

Visit our online store for gifts for music lovers

 
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 - 2014 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission