another dampp-chaser thought/question

[DCrpt@comcast.net]

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       I got my information from a class that Roger Jolly taught at the National Convention in Reno.I believe there are two seperate problems with flanges.The center pin flakeing is on older Samicks and would definately require repining.But I am sure that Roger talked about another problem and he said the cure was 50/50 alcohol and water.I might be wrong about the felt seizeing up with friction.But my memory says that there was a chemical they treated the felt with in order to lubricate that was the problem. I can say for sure that the alcohol and water treatment has worked on many samick pianos.       Robin Olson RPT  

-------------- Original message -------------- 
Robin, 

Are you sure it isn't the old Samick "flaking" problem with the center pins? 
Just wondering. 

Avery 

At 09:38 PM 10/13/04, you wrote:

Thanks Robin,
I've treated a few with protek to good effect so far... I thinking of doing the whole tray and I'll have to try this method. The humidity has been high here, consistently in the 60s. That is when the problem showed up so I presumed... ;-)

Thanks,
Andrew
At 02:38 AM 10/13/2004 +0000, you wrote:

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 th! at 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 
> r! unning. 
> 
> 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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