Hateful little F DAMPER

[Jorgensen, Michael L]

Thank you to each of you who gave me the many wise tips and tricks for dampers,
       The offending harmonic is gone!!!. I checked and rechecked everything mentioned.   The solution was from Mary and Andrew.  I tried simulating the affect of added weight and found that even very little stops the problem and that the weight had to be on the front side.   Mary said something about preferring to extend felt toward the front of the damper as opposed to behind and bending it to favor the front.   This seemed counter intuitive for that short unbalanced damper. A very slight bend corrected the problem without changing any felt.   
    The damper guide hole is also almost directly under the right string which has made it especially challenging.  Vince suggested "moving the hole".  All other holes in the rail are nicely aligned, the problem is that F is very close to F# as a unison.  Probably half the usual space between them.   What is the best way to "move" that hole??  
     In this case I couldn't make any improvements on string leveling and the bushing is good.  Detuning the unisons is one I'll add to my bag of tricks if I'm ever in trouble but that didn't solve this one.   I wonder if a drop of thick CA glue placed to form a bridge between where the wire parallels the head on an off set damper would help stabilize it and improve this inherently weak structure?  There are no damper springs.

Thank you again to all for helping me overcome some more of my damperphobia and adding some tricks to my arsenal.  I am still interested in any damper tricks. 
-Mike

> ----------
> From: 	Jorgensen, Michael L
> Reply To: 	College and University Technicians
> Sent: 	Tuesday, November 5, 2002 1:59 PM
> To: 	Caut@ptg.org
> Subject: 	Hateful little F DAMPER
> 
> Hello All,
>     Any tricks out there from those who have truly mastered dampers?  Lowest tenor F damper on S&S Ds??  Certain seasons, the guide rail grows longer putting the wire too close to the string so it zings.   I fix it and then the damper doesn't work so good.  I always end up slicing trichord felt deeper, bending wire this or that way, playing around, sticking thread between the felt, poking with needles, crying, and eventually replacing felt.   I'm getting tired of it.  I extended with a longer felt so it is almost under the brace, and the damper works fine except I'm getting about 1/2 second sing from the 5th partial.  I've replaced and messed with this so much, I don't really have a record of the original location and length of felt, though it never did work good anyway.  Ideas?  Has anyone ever made an extension like an overdamper?
> -Mike
> 
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