<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Re: Scaling Problem reduex</TITLE> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <STYLE type=text/css>BLOCKQUOTE { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } DL { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } UL { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } OL { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } LI { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } </STYLE> <META content="MSHTML 5.50.4522.1800" name=GENERATOR></HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Joe:</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks for your response.  Only = one so far.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I'm sorry your Brombach "loner" is such = an unfriendly antisocial piano.  I'm sure you meant "loaner"  grin.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I don't doubt you are correct about = twisting causing the problem.  I just would like to understand what is = happening. If twisting strings in the wrong direction causes the higher partials to go = flat, couldn't we take a string that is excessively sharp and dial in a twist = to correct it.  Of course that is silly, but it shows my dilemma in = trying to explain what is going on.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I'm still at a loss to explain why a = string would go radically flat at the higher partials on only one note and less so on = other notes.  I used an Accutuner which may not have given the info = that rct would have regarding amplitude etc.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I think that I used two turn twists for = the single wound strings.  In retrospect I realized that since this was a very = short string piano that may have been excessive.  It hadn't occurred to = me at the time that twists should be related to the length of the string. = </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I recently sold a 7 foot grand that had = bass strings by a particular maker, and some of the double wound strings were = somewhat dead.  Having nothing to lose, I put three full turns on = the bad ones and they came alive.  These were new strings.  I probably = won't use that maker again.  I notice that there is wide opinions = about twisting bass strings.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>One more thought!  If wire = stiffness causes higher partials to be sharp, did my twisting in the wrong direction make = the wire more limber?  And did it stay more limber after twisting in = the correct direction?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>So many questions!  So few answers!</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Regards</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Carl Meyer</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=joegarrett@earthlink.net href="mailto:joegarrett@earthlink.net">Joseph Garrett</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, May 20, 2001 = 10:43 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Scaling Problem = reduex</DIV> <DIV><BR></DIV> <DIV><FONT size=4>Carl,</FONT></DIV> <DIV><FONT size=4>A few years ago, my son worked with me in my shop, = he couldn't get the principle of twisting in the direction of the = winding. Needless to say, he twisted the bass strings of my "loner" grand, (a = 5'1" Brombach), in the wrong direction. About 90% of those strings, even = after I retwisted them the correct direction, were bad. Really a nasty sound. = I have since replaced them, but what you experienced, I'm convinced, was due = to twisting in the reverse direction.</FONT></DIV> <DIV><FONT size=4>Regards, </FONT></DIV> <DIV><FONT size=4>Joe Garrett</FONT></DIV> <DIV></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=cmpiano@home.com href="mailto:cmpiano@home.com">Carl = Meyer</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, May 20, 2001 = 7:40 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Scaling Problem reduex</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Ain't gonna lurk no mo, no = mo!</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I'm gonna tell a story.  It's = a bit sad and  embarrassing for me but it ends okay.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>A young man and his sister found an = art deco piano on the internet a year or so ago for 10000 dollars.  It = had a severely cracked plate in the middle section.  A half moon = crack thru the tuning pin area and the two struts at the ends cracked about = half way thru.  This piano was a Strohmenger made in London about = 1930.  It was 4'1".  Piano was a half round</FONT></DIV> <DIV><FONT face=Arial size=2>shape (As Victor Borge would say = "That big fat opera singer didn't lean on the side of the piano.") It was 2-tone, = dark mahogany and light maple, and the rear of the lid opened like a = duck's rear end.  The legs swooped down to the floor to meet at the = lyre.  The mover said "I'll never forget where you live-It's where I saw this = butt ugly piano".  Actually, it grew on me.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The piano was in Austin,Tex and I = was shown a Xerox of the crack.  I told them that if anyone in the area = could fix it I could and I doubted anyone else would even try.  I won't = give you a price tho till I see it.  Well, they went ahead and bought it = for 8000 and I did take on the job.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>After repairing the plate (no I = didn't weld it, I re-enforced it patched it and used 1/4 thick, 2 inch wide steel = bar to support the sagging section and used lots of screws and steel filled = epoxy.)</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Now the embarrassing part.  I = rescaled the piano and was stringing fat, dumb and happy from the top down in the = bass and was 2/3 finished when I realized I was twisting the strings in = the wrong direction.  Whoops! So I corrected them and continued.  = You'll see why I have to admit this later.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The reason this applies to scaling = is that this piano had 35 notes below the bass break.  There were no = agraffes at all.  Notes 36 and 37 were bichord wound strings and the next = four notes were bichord plain wire.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I had a real problem when I chipped = it.  Lots of chipping but </FONT></DIV> <DIV><FONT face=Arial size=2>the center section finally settled down.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Now when I tried to actually tune = it, note 35 sounded terrible. It just couldn't be tuned.  I tried tuning = the fundamental of both strings to the accutuner and the two strings = didn't even sound the same.  Then I found that the left strings = partials 2-5 were  21, 3, 4, and18 cents flat.  The right were 21, 18, = 21 and 38 cents flat.  I sure didn't know what to do.  I called = everybody I could think of.  Nobody could give me a good = explanation.  So I ordered a pair of the smallest universal strings I could get, put = them on and lo and behold, It sounded good.  So I ordered four more = strings and used them on notes 36 and 37 ( the first notes above the bass = break)  They weren't nearly as bad as note 35 but </FONT></DIV> <DIV><FONT face=Arial size=2>I replaced the anyway.  = </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Now after all this work, I thought = that piano sounder better that a lot of much larger poorly scaled grands. = Certainly the best sounding 4'1" I've seen.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The customer is delighted and so am = I.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Here are some = questions.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Did my twisting the strings in the = wrong direction damage them and what exactly did it do to them? And = why just the top three?</FONT></DIV> <DIV><FONT face=Arial size=2>If they were just bad strings, what = was wrong with them?</FONT></DIV> <DIV><FONT face=Arial size=2>I'm suspicious that the string = winder didn't use enough tension, but would that cause the partials to go flat?</FONT></DIV> <DIV><FONT face=Arial size=2>I checked the strings diameter and = length etc and couldn't find anything wrong, no loose windings, nothing.  </FONT></DIV> <DIV><FONT face=Arial size=2>What happened?  = Anybody?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Carl Meyer</FONT> </DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV>---- Original Message ----- </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=sec@overspianos.com.au = href="mailto:sec@overspianos.com.au">Overs Pianos</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B></B> </DIV> <DIV style="FONT: 10pt arial"><B></B> </DIV> <DIV style="FONT: 10pt arial"><B></B> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, May 20, 2001 = 6:11 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Scaling = Problem reduex</DIV> <DIV><BR></DIV> <DIV>Kevin, Joe, Ron and other lurkers,</DIV> <DIV><BR></DIV> <DIV>Saw your post earlier today Kevin when you wrote:</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial = size=-1> I've noticed something on some newer pianos lately . . . I've been = encountering more and more pianos of late that seem to have a real scaling problem = in the low tenor section. . . but where I really see it is in the new = Yamaha model GA1, and . . GH1. What is happening is that the designers = of these pianos have put too many notes in the tenor that belong in the = bass. As you play chromatically down the scale, these notes start = sounding like "pong-pong-pong" and then you hit the bass, and they sound = normal again.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>Your absolutely correct. Why oh why are so many manufacturers = so 'thick' that they can't see that they're crippling their smaller = pianos by insisting on breaking at B27. Little pianos like the GA1 should = break at E32/F33 at the lowest, but they just don't get it.</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial = size=-1>    I know that this is caused by continuing to drop the tension on = the strings in order to get the fundamental down to the required = frequency, but you reach a certain point, and you get a tone that seems = hollow and is very difficult to fit in with the rest of the tuning.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>As soon as the long bridge turns and heads for the bass side = of the case the scale has had it. If the break was higher up the tension = wouldn't fall away so dramatically.</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial = size=-1>    I've had some partial success with carefully doping the hammers, = and voicing the bass down, plus leveling strings, straightening = termination points etc., but not to any totally satisfactory result.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>No it's not possible to get it satisfactory. But why should technicians in the field have to go to such measures just to get = the things to sound somewhat like a piano. And it's only half a fix = anyhow, because the problem is with the scale.</DIV> <DIV><BR></DIV> <DIV>Ron N's suggestion was sound, and I have no doubt that = installing bichord covers for a few notes will make the piano 'less bad' as = he says. But I'm more in favour of installing a tenor bridge and completely = rescaling the thing. But you wouldn't bother with a little entry = level piano like the GA1.</DIV> <DIV><BR></DIV> <DIV>Kevin continued later in the day;</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial size=-1>Thanks = to all who have responded. . . . . . . . I have nothing but the greatest = respect for Yamaha, and their products, (I own two) but I can't = understand why that company, which is the most advanced in the world, could = produce a product with such obvious poor planning.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>While Yamaha certainly know how to manufacture pianos to a = blueprint, they get the blueprint wrong. They don't seem to have a clue about = scale design with their smaller grands (ie, anything under and before = the C7F), and there's not a Japanese manufacturer with a decent upright = scale. Furthermore, both the Yamaha CF and Kawai's EX are basically = scaling clones of the Steinway D (all three have got a speaking length at = F21 of 183 cm - what a magic number this must be!). Why? Why do this? = What's so wrong with doing a bit of original thinking. We've all basically = wasted a whole century by trying to follow in the foot steps of one = company. Why do this? We homo sapiens are supposed to be intelligent, but = sometimes we seem to be no more creative than sheep.</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial size=-1>The = Japanese are such industrious and intelligent people, that you would think = that surely they would stop and go back to the drawing-board before = shipping one.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>There are intelligent folks and idiots amongst all = nationalities. We just need to believe in ourselves now and then. We can move = forward if we let ourselves do it. It's no use going back to the 'drawing board' = only to produce the same old trash. We need to rethink the parameters, and = it needs to happen in our generation. Actually, I believe this list = just might make it possible. Isn't that an exciting prospect.</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial = size=-1>    If I tuned nothing but Yamaha grands, I could spend out my days = in relative happiness.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>I couldn't. They're fine while ever the wether stays stable. = But as soon as the wether changes the tuning stability is 'out the = window', and its scale and down bearing and sound board related.</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial size=-1>But I = just don't get it with these really small ones that are starting to come = out on the market.</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>Many designers seem to be such 'traditionaloids', they can't = bring themselves to move the break away from A#26/B27. That's where it's = always been historically - so we can't mess with tradition can we? It's a = similar situation with 7' grands which break at E20/F21. Just because the = concert piano breaks at F21, why should the 7' scale be ruined by breaking = it at F21. A 145 cm F21 speaking length on the 7' is going to be = somewhat short on break % compared to the 183 cm F21 on the concert piano (and = there's a 'paddock full' of these ordinary 7' pianos out there, which could = be so much better at no extra cost). Let's damn tradition, if there's a = better way of designing than the traditional way.</DIV> <DIV><BR></DIV> <BLOCKQUOTE cite type="cite"><FONT face=Arial = size=-1>    But I'm not working to please myself. I just don't want a = customer to buy one, and then think that it's a tuning issue, like I should = be able to just fix it in three to five minutes. I'm a = "technician"  not a  "magician".</FONT></BLOCKQUOTE> <DIV><BR></DIV> <DIV>Exactly, but you'd need to be a magician to get many of those = stupid little designs to hold tune for longer than takes for you to get = your kit back in the car - if indeed you were able to get it into tune at = all. I had an experience some years ago when I got a call-back to a = newish Japanese 131 cm top of the range vertical I'd tuned the week = before. "It's gone out of tune", she bleated over the phone. When I checked the = piano, it was the fallen-over tension area just before the cross which = had gone quite sharp (it had rained during the week since the tuning hadn't = it!). When I tried to explain that the problem was with the scale design = of the piano, the client didn't believe me. She accused me of = incompetence and of trying to pass the blame onto the piano - which couldn't be the = problem, after all, it was a new piano! I was less than impressed with the = prospect of wearing the blame for something which I knew to be due to poor = scale design.</DIV> <DIV><BR></DIV> <DIV>There, I feel a whole lot better now. I've been quietly = bubbling over for a while on this issue. Thanks Kevin.</DIV> <DIV><BR></DIV> <DIV>We must widen our design perspective. It is now possible to = design and build pianos which are better than anything which has gone = before. Let's do it! Even the cheaper pianos could still have better = design.</DIV> <DIV><BR></DIV> <DIV>Over and out.</DIV> <DIV><BR></DIV> <DIV>Ron O</DIV> <DIV>-- <BR>______________________________<BR><BR>Website:  = http://www.overspianos.com.au<BR>Email:     &nbs= p;  = mailto:ron@overspianos.com.au<BR>______________________________</DIV></BL= OCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>