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This reply is about the Gulbranson.Was there a ceiling fan running in the room where the piano was?That can make the sound you described. Robin Olson<BR>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR><BR>> I recently brought a Gulbranson Console back up to pitch and tune. I <BR>> encountered a curious phenomenon that I'd like to delve into. When I <BR>> brought the unisons into tune I would eliminate interference beats but <BR>> would open up another quaver (the best I can describe it) that was <BR>> consistent throughout the mid treble. I tried re-tuning several times and <BR>> it opens up only when the unisons are well in tune and the intervals sound <BR>> OK except for the quaver in the notes. The speed, fast, was fairly <BR>> consistent from one note to the next. <BR>> The customer stated that this was the best her piano had ever sounded, was <BR>> ecstatic, so I didn't bring that up. I'd just like to be armed with some <BR>> ideas for next time I encounter it as I hate it. <BR>> <BR>> The next piano that day was a Knabe 6' grand and quite a joy to bring <BR>> 25cents plus up to pitch. It had four/five pins at the bottom of the bass <BR>> driven so the coils were all the way to the plate. I CA glue treated them <BR>> and some notchy pins at the high treble. I'm wondering if it is possible <BR>> to ream the holes a little and shim with sand paper without breaking the <BR>> coils. I'm thinking of loosening the tension on those strings and then <BR>> driving the pin out from the bottom. Problem is, is it possible to drive <BR>> it back in with shims? Or can those heavy bass strings be unwound from the <BR>> pin and reinsterted without breakage? <BR>> <BR>> Be-quavered in New Mexico <BR>> Andrew <BR>> <BR>> _______________________________________________ <BR>> pianotech list info: https://www.moypiano.com/resources/#archives </BLOCKQUOTE></body></html>