another dampp-chaser thought/question

[DCrpt@comcast.net]

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This is slightly off topic here.But  the Samick dampers sticking problem is not caused by humidity.It is caused by friction heating up a chemical in the felt that then causes the felt to expand and the flange to stick.The best cure is 50/50 alcohol and water treatment over night followed by  re-pinning and reaming any sluggish flanges.                  Robin Olson RPT

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> Hi John, 
> Photographing the install takes lots of light considering that you want a 
> picture of black parts on black beams. In my case it is worse because I 
> just put an !*#%&~undercover under my wife's piano. I'm going to invest in 
> a lot of black tacks for my next undercover job. Has anyone tried drilling 
> ventilation holes between the board behind the damper tray and the 
> conditioned cavity between the beams? I've been very tempted while easing 
> damper flanges, Wurlitzer by Samick strikes again. 
> 
> I think the only reason to do an under the beams installation is when there 
> is not enough room between the beams to fit the humidifier. I figure to 
> keep about 3/8" between the baffle and the ribs of the soundboard. On some 
> pianos that is above the beams and on some that is between the beams. I 
> don't let the bars rest on the beams as that is a potential source of 
> buzzing. Cut them short if you need to. 
> 
> The electrical cords come folded and tied when you get them. Just pull out 
> enough to reach and then tighten the twist tie. I then put a wire clip 
> close to this coil and fasten to the side of a beam. Yes they say that 
> those can form something like resistance coils when you're welding but the 
> wattage is much lower, I don't think it's and issue with these cords. So 
> far I've run the cords over the beams. If anything looks too close (like 
> ribs) I re-route to avoid and use the clips to secure the wires from the 
> sides of the beams. 
> 
> Wouldn't unisons going out be more of a rendering issue? Perhaps not if it 
> was dry. You will enjoy the stability that comes when this system is kept 
> running. 
> 
> Good luck, 
> Andrew 
> 
> 
> At 08:17 PM 10/11/2004 -0400, you wrote: 
> >Hi, 
> > 
> >I did my first dampp-chaser installation on Sat. I noticed today that the 
> >piano's unisons were more off-tune compared to Sat. than they were on Sat. 
> >compared to when I tuned it 1-1/2 months ago. Looks like it's doing 
> >something :) 
> > 
> >In any case, I was a bit uncertain about something. The instructions said 
> >to do an under-the-beams installation if there wasn't enough clearance for 
> >the humidifier baffle. But it didn't say what enough clearance was, so I 
> >presumed this meant "if it doesn't fit". There is between 1/4"-1/8" 
> >clearance above the baffle. Is this enough? 
> > 
> >I was also curious if anyone was willing to post a picture of their 
> >techniques to hide the extra cords. 
> > 
> >Thanks. 
> > 
> >- John Silva, P.T. sans R 
> > 
> >_______________________________________________ 
> >pianotech list info: https://www.moypiano.com/resources/#archives 
> 
> _______________________________________________ 
> pianotech list info: https://www.moypiano.com/resources/#archives 
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