Fwd: Petrof Quality

[Avery Todd]

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Dale,

Kind of ironic that you'd post this right now. Les Bartlett posted on the
caut list about a tuning problem with a Petrof. And I have a tuning appt.
with a regular customer next Tuesday who has a 7' version.

Avery

At 05:48 PM 12/8/05, you wrote:
>
>Return-path: <Erwinspiano@aol.com>
>From: Erwinspiano@aol.com
>Full-name: Erwinspiano
>Message-ID: <5b.774ebbef.30ca1fcd@aol.com>
>Date: Thu, 8 Dec 2005 18:46:21 EST
>Subject: Re: Petrof Quality
>To: Erwinspiano@aol.com
>MIME-Version: 1.0
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>         boundary="-----------------------------1134085581"
>X-Mailer: 9.0 Security Edition for Windows sub 5300
>
>   Well I actually wasn't done with this post but sumpin happened.
>    In conclusion The Tone was strident due to some version of 
> European Petrified Renner hammers & The beech bridge caps already 
> show significant signs of splitting around the bridge pins. The 
> tenor bridge was solid beech then the upper treble was capped but 
> it wasn't fairing any better. Now this piano has been in our mild & 
> envious California climate so it's not climate abuse.
>   Any other opinions & experience with this brand out there.
>  I frankly have liked the tone & especially the sustain of these 
> pianos, at least in the past ten years but this one was a pure disppointment.
>   Dale Erwin.
>Listers
>    After a recent encounter with a 10 year old 6 ft. Petrof ,my 
> once fairly high opinion of them has sunk. I generally have liked 
> the sound of there bellies & the workamnship looked good but  I had 
> the following experience.
>   The action although upon examination had a nicely done 5.3 
> overall action ration the touch was extremely heavy high 60's down 
> & below 20 up. The problem is that the hammers were just way to 
> heavy for example Note 16 was 10.5 grams. That's  hammer wt. not strike weight.
>   So extrapolate those heavier than normal readings thru the rest 
> of the  scale.
>   Since the desired service was to make it play more like a Saturn 
> than a truck  & no parts were being changed the original parts were 
> used. The remdey was to  add one lead to a sparsely leaded 
> keyboard  & then adjust the wippen springs. Even at that the 
> average down up weight was around 56 to 22 up which is a 39 balance weight.
>  I believe  the real solution was a lighter set of hammers & 
> subsequent even leading applied with springs detached to some 
> higher than normal nominal number down/up numbers & then re 
> -tweaking the springs. for a light bit of wippen weight removal 
> from the system.
>   This to me was a prime example of a nicely done leverage set up 
> that was doomed from the git go due to extreme hammer weights It 
> seems  all grand piano actions fall within certain reasonable & 
> typical leverages that when exceeded are problematic until 
> rectified by appropriate counter measures.
>
>
>_______________________________________________
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