Bergman upright action problems

[justpianos@our.net.au]

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?
>  
> Thanks,
>  
> Dave S.
> 



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