S & S 'D' Problems

[vem@email.byu.edu]

Avery,
It sounds as though the dealer tech lowered the stack rather than raised it.  
Here's one thing you can check.  With the stack attached, measure the height of 
the center of the hammer flange center pin from your bench. It should be 5 
3/4", or very close to it.  Also the height of the center of the wippen flange 
center pin from the bench top should be 3 1/4".  This will give a differential 
of 2 1/2" (difference between the two heights).

- List,
- 
- Warning. This may be a fairly long post. Here's the background.
- 
- I checked a few things and found that the dip is well over 10mm on the
- whites, the hammer blow is at least 2", the drop is way too much and
- there is plenty of aftertouch, in not too much in some cases. However
- the basic feel is fairly decent, maybe even on the light side. Almost 
- "dangerously light", as Anton put it.
- 
- If I raise the hammer line to where I normally like to have it (around
- 1 3/4" or so, that's going to seriously increase the aftertouch. Even
- raising it to 1 7/8" would cause a problem and I don't think I can
- decrease the dip enough to compensate for that. There's also not enough
- room to be able to lower the whites any. They're already about as low as
- they can be.
- 
- That brings me back to my first question. Would raising the stack have
- made these compromises necessary? Especially the excessive hammer blow?
- 
- Any suggestions on what to do to correct the problem(s). I haven't had
- a chance yet to check the backcheck height in relation to letoff. That's
- one possibility but I'm not quite ready to jump in and start lowering 
- backchecks just yet, until I know what's really happening here. The
- problem was not there before the tech raised the stack.
- 
- Got any comments Horace? Anyone else? I'm going to have to get on it
- this week, so any quick help would be greatly appreciated.
- 
- Sorry about the length of this. It just takes a bit to explain all this.
- I'm also going to send this to the caut list, so sorry about any
- duplication for some of you.
- 
- Regards,
- Avery
- 
- P.S. At least they corrected some of the problems with the damper lift,
- even though I don't really like the damping, either.