Two action questions

[Richard Brekne]

Hi list

I got two questions for you all relating to grand actions.

#1.  From time to time I run into a so called quality grand sort (I wont
mention the name but it starts with a "P"  grin) that has an odd ball
problem regarding regulation. Basically said, unless the jack is
regulated waaaayyy back, the note will miss. I ran into this problem on
an action I just reworked, I had repacked the nuckles insureing a nice
round shape, took much care to regulate the return springs nicely,
height of the tip of the jack to repetition lever was set to play it
safe (I have had this problem before on other such grands) made sure of
basically everything.  Still, upon setting the action in the piano
fifteen or twenty notes miss. And try as I may to find a reason, the
only thing that seems to help is to set the jacks so that they are well
back of the back edge of the core of the knuckle. Jack tips are barely
beveled and this is taken into acount. I suspect action geometry..(It is
never all that good on these things). Any ideas ???


#2. Brand new Yamaha C7.  Action is very well bedded, and regulated.
Still on hard play in the middle area, 8 or 9 hammers on each side of
the note being hit raise (hop) very noticible. Feels like the hammer
rail is moving. All screws are dead tight. Lots of power seems to
dissapear. Only happens in the middle section of the action..
Suggestions ??

Thanks muchly

Richard Brekne
I.C.P.T.G.  N.P.T.F.
Bergen, Norway