Pianotech

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

I am regulating an older Bechstein grand, the kind with the jacks attached to the keys. There isn't any serial number or model visible. I leveled the white keys and proceeded to work on the blacks. But they're a lot smaller (lower) than anything I've ever seen so the tops can't possibly sit anywhere near ½" above the whites. To do so would raise the black keys above the tops of the balance rail pins. Or if I were to lower the white keys they'd be sitting too low on the key frame. Which brings me to my next problem: the dip that is currently present is very shallow on both the white and black keys. If I put a standard 13/32" dip on the white keys I have to remove a lot of the existing front rail punchings to do so. And if I increase the dip on the black keys then they will depress beyond the level of the white keys when depressed.

So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work):

Key height = 63 mm (2.5")
Hammer blow = 45 mm (1.75")
Let-off 1.5 mm = (1/16")
Dip = 9.5-10 mm (3/8"-13/32")

All these look normal to me for the majority of pianos but the one I'm working on now has me baffled.

Has anyone else had the same experience and can perhaps supply me with alternative regulation measurements?

Thanks for any help.

... So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work): ... can perhaps supply me with alternative regulation measurements?

Thanks for any help. ...

... So, my question is: are there different measurements that I should be using for this particular piano? My PTG Piano Action Handbook lists the following for Bechstein grands (which obviously won't work): ... can perhaps supply me with alternative regulation measurements?

Thanks for any help. ...