The other thing that Jon might consider is placing the half rounds on top of the felt rather than on the plate behind the felt. That would raise the strings completely off the felt. You might not need as tall a piece of brass either. While prying the wire up might be difficult it's not such a long section that letting down the tension would be burdensome in order to facilitate inserting the half rounds. Good to hear from you Mr. Overs. It's amazing how proper lighting can smooth out those little blemishes. <G> David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Ron Overs Sent: Sunday, April 11, 2010 7:06 PM To: pianotech at ptg.org Subject: Re: [pianotech] X-Ratcheting Counter Bearing Shim David and all, We change the counterbearing arrangement similarly. I also regard it as important to have enough free string length segment on the tuning-pin side of the agraffe - 20 mm works out to be about the optimum (we have done tests in-house to establish this). Certainly, those pianos from makers who insist on running the counterbearing felt very close to the agraffe, tend not to speak quite as well as they otherwise would. Good to see that nicely prepared plate, David. Ron O. >I've produced this method of counterbearing and tried inserting felt between >the agraffes as well as not. There doesn't seem to be any ringing if the >felt is not inserted between the counterbearing bar and the agraffe. I do >insert felt on the tuning pin side even though that doesn't seem to produce >much ringing either. Lately, however, I tend to insert felt on both sides >of the counterbearing bar more for looks than anything else. It's pretty >soft felt though and doesn't apply much if any real pressure on the strings. > > >David Love >www.davidlovepianos.com > > >I like it, I have not had a lot of luck with protek on the understring felt. >You do need to have contact with the felt though or you have some ringing? > >David Ilvedson, RPT >Pacifica, CA 94044 > > >Attachment converted: Powerbk HD:P3210060.jpg (JPEG/<IC>) (00CE4E46) -- OVERS PIANOS - SYDNEY Grand Piano Manufacturers _______________________ Web http://overspianos.com.au mailto:ron at overspianos.com.au _______________________
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