Interesting question. I've done shimming along the flange area where there was no change in behavior. If there are pin bushings, most of the tension is on the bushing rather than the flange. You could try shimming, just to see. You might use popsicle sticks or force some epoxy putty up in there, or sandwich several layers of veneer. The question is, how stable is the environment? Low tenor area is always moving around with humidity and temperature changes. Put a string cover to buffer the atmosphere. Stage lights? Big room or church sanctuary? Is the piano in good tune when you leave? Or is it so untunable that you can't leave it in tune? I've had trouble tuning a certain brand/brands that came out of Dung Bay that thwarted my best efforts to tune them. Front segments that went steeply down to agraffes that were sticky, coupled with very tight pins. I have one of these that I"ve been tuning for more than 10 years, and it still requires my best techniques and full concentration on.
Paul McCloud
San Diego
Hi Folks.
I look after a Karl Muller G-175 (perhaps a Samick?) that is terrifically unstable in the mid section, though the bass and treble are pretty good. A well-maintained Piano Life Saver isn't helping much. This piano belongs to a teacher and I have to tune it every 8-10 weeks. All plate bolts are tight and there's no sign of plate damage or problems with the case.
The one thing I hadn't thought of was the plate flange to pinblock fitting. In the bass and high treble I can 't force a business card in between the block and flange, but in the centre sect ion the gap is .104"!
I seem to recall someone mentioning that maple shims can be forced into the gap and glued in to help solve that problem. Would that work? Where would I get the shims if it might as I'm not really a woodworker ? How many would I use ?
Another alternative someone suggested was to turn the piano upside down and fill the gap with epoxy. I n this case that isn't an option.
Does anyone have any suggestions?
Thanks
John
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Original Message------
Hi Folks.
I look after a Karl Muller G-175 (perhaps a Samick?) that is terrifically unstable in the mid section, though the bass and treble are pretty good. A well-maintained Piano Life Saver isn't helping much. This piano belongs to a teacher and I have to tune it every 8-10 weeks. All plate bolts are tight and there's no sign of plate damage or problems with the case.
The one thing I hadn't thought of was the plate flange to pinblock fitting. In the bass and high treble I can 't force a business card in between the block and flange, but in the centre sect ion the gap is .104"!
I seem to recall someone mentioning that maple shims can be forced into the gap and glued in to help solve that problem. Would that work? Where would I get the shims if it might as I'm not really a woodworker ? How many would I use ?
Another alternative someone suggested was to turn the piano upside down and fill the gap with epoxy. I n this case that isn't an option.
Does anyone have any suggestions?
Thanks
John