---------------------- multipart/mixed attachment To follow up on this topic, I thought I'd impart my latest idea on false beat suppression by means of Bridge Pin Coupling (BPC). First, though, a quick briefing on my other BPC of ideas... Initially I thought of clamping mechanisms such as binder clips in various forms and sizes but their fabrication would probably be cost prohibitive. Then something a little more mechanically sophisticated, similar to a brass rail repair clip made of brass or HMDP. I have not attempted either application. Next came a wedging execution where an inverted trapezoidal HMDP fabrication would fit between the front and rear bridge pins and be secured with screws to the bridge whereby applying pressure on the pins to reduce their wavering. Again, no prototypes. Somewhere in there was a fine wire gauge screw that would install relatively close to the pin so that once screwed into the bridge, the head would bind against the pin thereby reinforcing. This morning an idea of using music wire woven through a unison's bridge pins came into mind while pondering the PitchLock application. The wire segment would need to have a bend so as not to apply too much tension which might cause other problems with the pins. The segment might also be bent to wrap around the end pins to some degree. While considering the effort needed to place the bends in close proximity to each other I thought that a metal softer than music wire could be used and non-round while we're at it. . . brb. . . so I just made a few prototypes and attached a jpg. It is a non-working example because this piano is in the re-whatevering process. So, I'd like to 'open-source' this since I don't have false beats around for experimentation. There might be a more suitable metal to use than a construction staple as well. Long term trials are needed to see if it vibrates loose... I hate it when that happens. Has anyone already tried this? Regards, Jon Page, piano technician Harwich Port, Cape Cod, Mass. mailto:jonpage@comcast.net ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: BPC2.jpg Type: image/jpeg Size: 106297 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/7a/3c/6a/3a/BPC2.jpg ---------------------- multipart/mixed attachment--
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