[pianotech] 1983 Bluthner with Renner action

[Rex Roseman]

Terry

I am working with a piano that may fall into the category that you are
describing. I had to replace the expanding action rails on a Wurlitzer and
when I regulated it with 1-3/4" blow and 10mm key dip the jacks hit the
cushion at the back of the repetition level window. My thought is to
increase the blow so that the whippen moves farther before let off,
therefore decreasing the range of motion for the jack. Is this a good idea
as per below, or do I need to revisit the action spread?

Thanks.

Rex Roseman

PS This is the first time that I have had to put new action brackets on a
piano and had to set up an action from scratch, so I am still somewhat
feeling my way through the process.


-----Original Message-----
From: Farrell [mailto:mfarrel2 at tampabay.rr.com] 
Sent: Sunday, May 03, 2009 7:30 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] 1983 Bluthner with Renner action

<Snip>

As it has been written on this list many 
times in the past, "let the piano dictate the regulation specifications".


<Snip>

If, by chance you are not aware of the process, I'll try at least to give 
you a start. Start with the keys. Use the fallboard and keyslip as guides 
for key height. Place action in piano and check blow range - can you adjust 
somewhere in a 1-3/4" to 1-7/8" range? What kind of dip do you have with a 
given blow - is it what you like? Adjust accordingly. Your strings will 
dictate let-off and drop.

Terry Farrell