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Joined: Feb 2017
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You are totally free to do it yourself. Some have done it and it came out fine. Others have done it and when they run into unexpected problems (which they attempt to "fix" but don't know how) then they call in the experience and end up paying more to have to undo what they did and then do it right.

You are correct though...it ain't rocket science...go for it and save the big buckos. I considered doing my hernia operation myself but then figured it would be better to pay someone with experience. Coming up soon.

Peter Grey Piano Doctor

Last edited by P W Grey; 07/29/21 12:24 PM.

Peter W. Grey, RPT
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I hope you dont think i disrespect an experienced and educated pianotech..i would never call myself a tech or offer me to repair someones elses piano.

There will always be people that is curios how things work (like me)..and they can be a pain the ass for other people i know that. I looked at your website P Grey, nice furniture work there, but i can tell that the guy with pianohammers totally out of line, thats not me. Im 47 and i have spent whole my life to explore technical stuff and put it into reality. Im not smarter than anybody else..but i love technical challanges.

On the other hand there will always be people that says stop...i cant do this, i have to call someone. And that why the world goes round..if everyone is exactly same the world would not be a fun fun place to live in.

Im reading every night and watching videos.... there is tons of info on web..no matter what info you want...i slowly build up my knowledge, and its important not to rush. But i will come to a point were i feel safe enough to grab this mission..OR i will end up calling someone. Time will tell

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You seem like the kind of person who could do it (up to a point). This is why I say go for it. However, things don't always go smoothly and problem solving can become very interesting. Most people are unfamiliar with much of what we do and why. You however may be astute enough to figure things out. Far more likely on a Yamaha than a Bluthner.

Peter Grey Piano Doctor


Peter W. Grey, RPT
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what if action is ok and you just need better strings? Ask Paulello.

Last edited by pold; 07/29/21 08:51 PM.
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Nice post P Grey. Thanks.

Yes ive been thinkin about strings to. Whe have already found out that the tone came alot back buy swapping one hammer. Most likely someone has voiced the hammers down to much. The soundboard is intact, and the downforce (stegtryck in swedish) is ok.

If i ask you guys to rank..and maybe how you think/know how the different parts in a piano affect the overall tone? I suppose a crakced soundboard and lost downforce could place first but thats not the case for now..

1 Hammers??
2 Strings??

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Originally Posted by heliac_swe
Nice post P Grey. Thanks.

Yes ive been thinkin about strings to. Whe have already found out that the tone came alot back buy swapping one hammer. Most likely someone has voiced the hammers down to much. The soundboard is intact, and the downforce (stegtryck in swedish) is ok.

If i ask you guys to rank..and maybe how you think/know how the different parts in a piano affect the overall tone? I suppose a crakced soundboard and lost downforce could place first but thats not the case for now..

1 Hammers??
2 Strings??

The action is always thought as a "solution", I am not an expert but I think it's mostly about the strings (are they really good?), tuning pins (are they really stable?), and hitch pins (are they really stable?). These are not too expensive to replace, and if you have a bad piano it's a great motivation to become a DIY tech.

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The best way I can put it from my own experience is, if you only have funds to replace one or the other (but not both), then go with the hammers. This obviously assumes that the stringing assembly is still fully operational (though aged). That being said, bass strings deteriorate faster than treble wire, so that can make a difference. Plus, when replacing strings you must also (almost always) replace the dampers.

So in terms of which will be more noticeable in and of itself, IMO hammers.

Peter Grey Piano Doctor


Peter W. Grey, RPT
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+1 Peter.


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If i decide to take care of it on my own its definitly the hammers that goes first.

But i dont really know wich hammer...one tech told me to only use Yamaha original. But there is Renner and Abel and they seems to be good too.

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I've replaced Yamaha with Abel. Very good hammers.
I agree with Peter...new dampers are a must with new strings. Vital.
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You can purchase the entire hammer/shank/flange assembly from Yamaha and screw them on. Space AND travel the shanks, correct any twisted with heat, and the rest is regulation.

Peter Grey Piano Doctor


Peter W. Grey, RPT
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From my experience with Yamaha pianos, I would only go pre-hung if it’s a factory Yamaha set. These pianos are extremely sensitive to hammer strike point and a tiny variation could have your highest notes sounding wooden.

Even with a pre-hung set all the hammers have to be set for resting height, ensure they’re hitting the strings correctly. The let-off, repetition levers and springs reset. Jacks must be relocated to the new knuckles and all the back checks need to be set. So nearly a complete regulation.

Then there is the voicing…


-Bill L. - former tuner-technician
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Actually, if I'm not mistaken, pre-hung is the only way you can get hammers from Yamaha anymore. Someone correct me if I'm wrong but somehow I seem to recall hearing that on my last conversation with the service dept.

Peter Grey Piano Doctor


Peter W. Grey, RPT
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That must lead to hard work at the top mustn't it?
Nick


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Well...now the Yamaha is sold. There was a guy, very good classical player, who liked the dark tone.

I tried a Wendl & lung from 2006..tone ok but the action was poor.

Last edited by heliac_swe; 08/13/21 10:13 AM.
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Originally Posted by N W
That must lead to hard work at the top mustn't it?
Nick

I always have my doubts about pre-hung anything, but Yammys tend to be pretty consistent and accurate.

Peter Grey Piano Doctor


Peter W. Grey, RPT
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www.seacoastpianodoctor.com
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Hello again.. Now i have tried a swedish Malmsjö 211cm from 1950 totally rebuilt with new black polyester coating. It outperformed the Yamaha in almost every aspect. The price is about 20000 USD. Im on my way to try a Petrof 237 1974, also totally rebuilt with new polyester coating. 22000 USD. From waht i can find out from Swedish forums the quality should be better on Malmsjö than Petrof. I suppose that Malmsjö hardly exist in the US..but what do you think about Petrof?

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A question for the piano forum?


Ian Russell
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Maybe this question fits better in another part of the forum? But pianotechs may have some good answers about building quality..

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Pianotechs with lots of customers who love their Petrofs may not want to tell you they are rubbish, if that is what they think. On the other hand pianists may be only too happy to tell you what they think about their Petrof pianos.


Ian Russell
Schiedmayer & Soehne, 1925 Model 14, 140cm
Ibach, 1905 F-IV, 235cm
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