[CAUT] CAF

[David Ilvedson]

I've been repinning the reps on our Hamburg D.   I pull the spring out of the spring groove and test with a gram gauge...usually 0 to 1 gram.   I pinning around 6 grams but how accurate does that have to be?   What range can I be in...?

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Richard Brekne" <ricb at pianostemmer.no>
To: caut at ptg.org
Received: 8/24/2009 1:37:52 AM
Subject: Re: [CAUT] CAF


>Hi Mark..

>Yes... I like the jack a bit looser then the rep lever... but it kinda 
>has to be tight enough to handle the tension on the spring correctly.  
>It has to move very quickly and firmly in to be sure... but not more so 
>then is needed to do the job... otherwise you end up with alot of noise. 
>Jack slap back noises are fun enough to keep under control as it is if 
>you get my meaning. To be sure tho... seasonal over tightness is to be 
>avoided :)

>Erics advice has been invaluable for me as well.  I liked his last 
>adjustment for let-off and drop...  he fudged on the sacred jack /core 
>knuckle line just a smidgen. This after a very very fine regulation mind 
>you... so he could get away with it to the actions benefit and not to 
>its detriment.

>Cheers
>RicB


>    Ric, for awhile I set rep springs on the very light side (and found
>    an ally in Richard Davenport) but in past years... well heck, I've
>    pretty much come to agree with everything you said below.

>    In Canada, Yamaha techs go to Japan rather than the Little Red
>    Schoolhouse for furtherance, and apparently their mantra for rep.
>    springs is "Bass like an elephant, tenor like a mouse, and treble
>    like a cricket..."   ;>)

>    Anyhow, all I can add, is that I prefer the jack pinning fairly
>    loose. Even though in most cases the spring is shared with the
>    (tightly-pinned) lever, I'm several times more paranoid about a
>    jack-center seizing during seasonal change.    

>    Regarding repetition lever height, I value the time (and patience)
>    Eric Schandall invested back at Steinway, teaching me to feel the
>    jack return under the knuckle, this remains my favourite final check.

>    best regards,
>    Mark Cramer