[CAUT] M & H model 50

[Vincent Mrykalo]

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Aaron,
A thicker but(t) felt will do it for you.

On Jan 30, 2006, at 5:58 PM, Aaron Bousel wrote:

> Hi all,
> I sent this about a week ago and got no response, so I thought I'd  
> try again.
>
> Thanks to all who have responded to this. UMass is on winter break  
> until a week from Monday and after that I'll have a chance to get  
> back to that piano (private customer). In response to what I've  
> read so far:
> I will of course recheck the regulation, but I don't think that's  
> the issue. The bobbling happens on a very soft blow when, I  
> suspect, the key doesn't even go all the way down, so more key dip  
> won't help. I'll check the profile of the butt "leather" to see if  
> a thicker butt felt will allow better escapement without allowing  
> the jack to skip out too easily.
>
> To go back to why I landed on pinning and return springs as a  
> solution: On a very soft, incomplete, blow the hammer is thrown at  
> the string just as the jack hits let-off. The hammer then rebounds  
> from the string but since the key has not been fully depressed when  
> the hammer rebounds from the string (as someone said, it could be . 
> 005" short of complete travel and that could make the difference)  
> it hits the jack and rebounds off of it. If there is no resistance  
> in the pinning, and the hammer springs are weak, it will just  
> bounce off the jack, back onto the string, back onto the jack, back  
> onto the string, until it runs out of energy.
>
> There was one part of my question no one answered. That was about  
> good quality flange bushing cloth. I haven't had to buy any for  
> quite a while so I was wondering about a good source. Also, since  
> we had the discussion about glues; does anyone use anything but hot  
> hide glue for rebushing flanges?
>
> And just a bit off topic: My email program (Eudora) monitors  
> incoming mail for questionable or just plain foul language, and  
> alerts me by marking such incoming mail with one or more chili  
> pepper icons in my inbox. Several of the posts on this topic  
> arrived with "chilis" and it took me a while to figure that the  
> program didn't like all this talk of "butts".
>
> I'm also looking forward to checking out Don's info on the sticker  
> tongue position.
> (Butts and tongues--what is this list coming to?)
>
> Aaron
>
>
>
>
>
>>> There is a Mason & Hamlin upright model 50 (vintage 1975) I  
>>> service and at the last tuning the owner was complaining about  
>>> bobbling hammers. The hammer pinning is very loose. I played  
>>> around with the note that was bothering her the most and through  
>>> a combination of repinning and strengthening the hammer return  
>>> spring was able to all but eliminate the problem. The piano is in  
>>> good regulation. Here's the issue: The action is really poorly  
>>> made. 1975 was not exactly the golden age for these. In repinning  
>>> the one I did, I could see that the flange bushing cloth was poor  
>>> quality. It would be wonderful to replace the whole action, but  
>>> that's not going to happen. Does anyone know if it's possible to  
>>> get replacement hammer flanges? These flanges are different from  
>>> the generic ones sold by piano supply houses. If that's not  
>>> possible, I have to go with rebushing what's there. Any  
>>> recommendations on a good source of flange bushing cloth? I know  
>>> M&H are making these again. Anyone know if the action design is  
>>> the same?
>>>
>>> thanks,
>>> Aaron
>>>
>>> ------------------------------------------
>>> Aaron Bousel
>>> Registered Piano Technician, Piano Technicians Guild
>>> abousel@comcast.net
>>> (413) 253-3846 (voice & fax)
>>
>> ------------------------------------------
>> Aaron Bousel
>> Registered Piano Technician, Piano Technicians Guild
>> abousel@comcast.net
>> (413) 253-3846 (voice & fax)
>>
>> ------------------------------------------
>> Aaron Bousel
>> abousel@comcast.net
>> (413) 253-3544 (voice)
>> (413) 253-3846 (voice & fax)


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