Hi Roger, I was asking about jangles not unwanted resonances. A similar thing happens with the Yamaha C7, and many other pianos as well -- but this time it is the lack of damphers. It makes the unison an octave above a misery to tune aurally. The simple solution is to merely mute all three wires of the octave below when clearing the unison. And be sure to "whistle" while you work! At 11:31 AM 10/29/2000 -0600, you wrote: > >>I have personally never had a client complain about rear duplex. Nor have I >>heard one myself that was offensive. Has anyone had to mute off a rear >>duplex because of "jangles"? >> >Hi Don, > Early Yamaha CF's have an A6 whistle that's annoying. It come's >from the back scale of the third note above the end of the factory braiding >tape. Just extend the tape for the extra 3 notes. All 3 CF's that I work on >has shown the same problem, all are 20 plus years old. >There is no problem with my CF111. but the factory extended the braiding >tape. <g> >You hear the high pitch, but you may not think to look in the lower mid >section for the problem. >The first piano took two or three attempts to find and fix, the other's 5 >mins. >It will sound like an A6 leaky damper. >regards Roger >Roger Jolly >Saskatoon, Canada. >306-665-0213 >Fax 652-0505 > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. Tuner for the Saskatchewan Centre of the Arts drose@dlcwest.com http://donrose.htmlplanet.com/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
This PTG archive page provided courtesy of Moy Piano Service, LLC