Pianotech

  • 1.  1910 ANT Petrof pinblock

    Member
    Posted 11-06-2020 07:55

       I came across an early Petrof grand that could be quite nice if it were to be rebuilt. In its present condition it is extremely flat - so flat in fact it is beyond the lower limit of the SAT III which is 198.8 cents. Tuning pin torque is 20 - 30 inch lbs. One option would be to use CA just to raise the torque, option 2 would be to go up a pin size and restring and option 3 would be a new block and removing the plate etc. There is no way to examine if there are cracks in the block from below. There is a solid piece of wood that has a finish on it that goes the entire length of the block. I am not sure if the real block sits above this or if it is the block. Even though the cheap fix is CA I am not sure its what should be done. The bass strings are quite tubby and dead but could come up if some of them are treated as a test or the pins are backed out and I move up a pin size.

    Any suggestions would be helpful. I have treated over 100 pianos both grands and uprights with thin CA very successfully . Because this is a grand and I can not see the underside of the block I am concerned . Of course I know how to remove pins and drive them in supporting the block and have done it.

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    James Kelly
    Owner- Fur Elise Piano Service
    Pawleys Island SC
    843-325-4357
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  • 2.  RE: 1910 ANT Petrof pinblock

    Registered Piano Technician
    Posted 11-06-2020 19:10
    Just to find out what it MIGHT sound like, if go ahead and dope it, bring it up and find out.

    Pwg

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    Peter Grey
    Stratham NH
    603-686-2395
    pianodoctor57@gmail.com
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  • 3.  RE: 1910 ANT Petrof pinblock

    Registered Piano Technician
    Posted 11-07-2020 10:42
    Although the offset range of of the SAT is 198 cents, it is easy enough to create an offset to any pitch, e.g., tune A4 to the pitch setting for G4 to achieve a -200 cent offset.

    Bob Anderson, RPT