Bergman upright action problems

[Piannaman@aol.com]

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Bruce,
 
The problem is that there is too much weight in the front of the keys for  
the weight of the action and spring tension combined to push the key back into  
place no matter how much lost motion I take out of it (I removed all I should  
have needed to and then some).  This is not a garden variety regulation  
problem, unfortunately.  
 
Dave Stahl
 
In a message dated 3/22/05 9:13:14 PM Pacific Standard Time,  
justpianos@our.net.au writes:

Hi,
Missed the first part of this message, so this may be  irrelavent, but assume 
this is an upright.
Hence hammers should not be  of the rail at all, and jacks should not have to 
force themselves under  hammer butts as a gap should exist for this. Even in 
a 
grand the jack  doesn't support the hammer roller, so regulation is at fault.
Bruce  Browning - The Piano Tuner




Piannaman@aol.com  said:

> Some pianos should just never be made....
>   
> I think these are made in the Chinese Young Chang plant.  They  look  
> suspiciously like those little 107 jobbers that break jack  springs from 
time to  time.
>  
> First ("free")  tuning presented a plethora of problems(Am I almost as  
>  allitertive as Alan:-).  The hammers were a good half inch off the  rail,  
keys were 
> tight, yada, yada, yada....
>   
> The REAL problem was that the keyboard is so poorly weighted that  there  
is 
> so much downweight in the black keys at either end of  the  keyboard that 
the 
> action weight and springs can't hoist  them back into  position, with 
damper 
> pedal on or  off.
>  
> I didn't take readings, but I could feel huge  weight differences from  one 
> key to the next.  After  everything was regulated as well as  possible, 
keys 
> eased,  keypins lubed, the jacks still could not force their  way back 
under  
the 
> butts, despite a healthy dose of teflon  powder...
>  
> I stretched the jack springs to increase  tension, though if  I had time 
I'd 
> have replaced them with  stronger ones.  This seemed to get  the thing to 
>  function.
>  
> Short of pulling leads out of the fronts of  the keys, any other ideas  
> helping this action?
>   

> 





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