Re voicing hammers/hardening

Don pianotuna@yahoo.com
Sun, 15 May 2005 14:08:40


Hi Michael,

A. use some "sound reinforcement" with a monitor for the pianist--instant
results and performer controlled.

B. Iron the hammers--instant results

C. a light coating of hair spray--full results in 2 to 3 hours

D. More traditional doping methods.

At 08:40 PM 5/15/2005 +0100, you wrote:
>Hello Rik & Andre and List
>I am trying to establish the fastest method of hardening the hammers of this 
>old upright German "Katz" which is used on stage in "Bartered Bride". Right 
>now we are still in rehearsal and it is very soft sounding. I have regulated 
>the touch and the set-off to bring the hammers within about 5mm from the 
>strings - which is pushing my luck somewhat as a lot of the butt springs are 
>broken! Even so it is very soft-sounding. At the moment we are countering 
>this to a degree by removing the front panel and kneeboard. Fortunately 
>there's a music desk on the fall. I have the following potions :-) Apsco 
>#425  Hammer Felt Reinforcer (that'll take you back a few years?). Very 
>pungent smell. I also have  a small can of Humbrol Nitrate Cellulose Dope - 
>this is usually used to taughten the paper tissue skin applied to model 
>aircraft. (great fun!) The Apsco stuff can, I believe, be thinned down using 
>Acetone (nail varnish remover - more smelly stuff!) as required. Given the 
>scenario and with the action on its front (hammers "up") what, in your 
>opinion is the best, fastest and most effective way to harden those hammers? 
>:-)
>----- Original Message ----- 
>From: "antares" <antares@euronet.nl>
>To: "Pianotech" <pianotech@ptg.org>
>Sent: Sunday, May 15, 2005 1:18 PM
>Subject: Re: Re voicing hammers
>
>
>>
>> On 15-mei-05, at 13:14, Ric Brekne wrote:
>>
>>> Hi Andre
>>>
>>> My own choice is cellulose lacquer. Its one of the softest, and 
>>> springiest lacquers available. It always struck me that if one first was 
>>> too use lacquer, then a lacqure with its own kind of resiliency was a 
>>> sensible choice. Dries fast, results show themselves in about an hour and 
>>> cures completely in a day or two (at least in the amounts used in hammer 
>>> dopping).
>>
>>
>> Sure, that's why I had no negative opinion about it, other than the fact 
>> that it dries up fast and is therefor a little harder to carry around.
>>>
>>> 'some technician' -  has observed that lacquers and other hardning agents 
>>> tend to coat the fibers of hammer felt making them brittle and 
>>> essentially destroying their resilent capabitlites. So a chemical that 
>>> simply causes the fibers to tension up a bit...(shrinking)  without any 
>>> other affect would perhaps be the ideal.  Havent tried any such thing 
>>> yet... shying from chemicals as I do, tho I have bumped into a bit of 
>>> reading on the subject.
>>
>> All hardeners clot the wool fibers up to a degree. that's why they are 
>> called hardeners.
>> I am against them on principle except for the outer extremities of the 
>> keyboard i.e. the highest notes and the lowest notes.
>>
>>>
>>> As for collodium .... grin... you are wrong about its primary benifit 
>>> Andre !  In reality that is its ability to make all future use of mind 
>>> expanding drugs totally redundant !! :)
>>
>>
>> Ah but I like collodium because it does show a result after 1 hr and 
>> especially for the fact that it is easy to carry around. If I want to get 
>> high, that makes it all the more attractive as well ... *((: >))) 
>> la-la-la-la-la....
>>>
>>> Oh.... and Terry... yep.. some folks are out there hardening Yamaha 
>>> hammers.  Usually because they have been devastated by softening agents, 
>>> over steamed, or just plain needled to death.  Strikes me that in spite 
>>> of all the ingenious alternative methods our American allies have for 
>>> doing things differently... too many over there have forgotten, put 
>>> aside, or otherwise ignored developing and maintaining needling skills. 
>>> No reflection on those who can mind you. One striking difference between 
>>> voicing problems one runs into here in Europe visa vi those in America 
>>> (based on personal experience) is that in America you find tons of cases 
>>> of hammers mauled one way or the other by the uninitiated tech. Where as 
>>> in Europe... the vast majority of voicing problems have their basis 
>>> simply from a lack of voicing maintainance done.
>>
>> And in the case of Quentins remark about hammer dope used on Yamaha's :
>> He indeed means applying some hardener on hammers belonging to a CFIII-S, 
>> the concert grand which has ..... Wurzen felt.
>> usually the lowest and highest Wurzen hammers could use some extra 
>> 'spritz', that's the price for less needling and easier needling.
>>
>> greets
>>
>>
>>>
>>> Cheers
>>> RicB
>>>
>>>
>>>
>>>
>>> Andre writes:
>>>
>>> /My "weapon of choice" is collodium (or collodion) because it is a 
>>> natural hardener, mixed with alcohol and ether.
>>>
>>> The ether smells badly for a short time, but the advantage of this is 
>>> that it is easy to apply (with a pipette), easy to take along (in a small 
>>> glass bottle) as a standard tool case item for the traveling technician, 
>>> it will stay the way it is (it does not harden out but stays liquid), 
>>> after 1 hour we get a result and after 1 day the
>>> stuff has done its work completely/
>>>
>>>
>>> _______________________________________________
>>> pianotech list info: https://www.moypiano.com/resources/#archives
>>>
>>>
>> friendly greetings
>> from
>> André Oorebeek
>>
>> www.concertpianoservice.nl
>>
>> "Where music is no harm can be"
>>
>>
>> 
>
>
>_______________________________________________
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>
>
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Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

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