Piano World Home Page Forums Our Most Popular Forums Piano Tuner-Technicians Forum Aliquot scaling on Blüthner 275, 1942

Hallo to everyone, this is the first time I put a question here.

Is there someone that have or had in his workshop a Bluthner 275, Mod C1 (1942) n. 126997 ?
I need to discover the original diameter of all the complex strings of Aliquot system.
A not skilled technician had previously replaced the Aliquot strings with wire No. 13, from the first to the last one.
So I cannot detect the original measures. There is no trace neither on the bridges nor in the anklet of diameter numbers.
If you have on the hands one of it like the mine, can you take the diameters by calyper, or have any idea where I found this dating?
I've send many times analogue request to german factory: never answer to me!!!

Can you help me to finish the restoration?

I think that should be incorret to calculate their diameter as for beaten strings because they must be able to acquiring their energy from the nearby beaten string, not from all the others as is done with the use of the pedal. Furthermore the Aliquot scaling is different from the more recents model (Where all the string are long same the beaten one and has same diam. too).
In my piano only in the last section of the plate is there enough space to accommodate equal in length strings.
Perhaps only these could have the same diameter.
But the other?

No.13 all the way through is definitely wrong!

The closest piano I have on file is a Style-X (7'6", around 228cm) c.1910. The Aliquot scale is -

13.5 x 7
12.5 x 6
12 x 6

11.5 x 6
14 x 5
13.5 x 6
13 x 6


For comparison to your piano, and so you may be able to interpolate an Aliquot scaling a little more easily, the scaling for the top two struck sections is -

16.5 x 2
16 x 4
15.5 x 6
15 x 7

15 x 8
14.5 x 6
14 x 9


I hope that's of some help!