<html><div style='background-color:'><P>Ron,</P>
<P>Being a novice in the world of sophisticated ETDs I would like to know how one programs the numbers you offered into the machine. If it is covered in a reasonable, readable fashion in the manual I will look there. I have found that the manual is not all that great and so if you could fill me in on the details I would appreciate it. You can do this off- list if you like unless you think it would be of interest to the readers. Thanks in advance. <A href="mailto:campimichael@hotmail.com">campimichael@hotmail.com</A></P>
<P>Michael<BR><BR></P>
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From: <I>pianotech-request@ptg.org</I><BR>Reply-To: <I>pianotech@ptg.org</I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Pianotech Digest, Vol 1285, Issue 60</I><BR>Date: <I>Sun, 11 Mar 2007 07:44:37 -0700</I><BR>>Send Pianotech mailing list submissions to<BR>> pianotech@ptg.org<BR>><BR>>To subscribe or unsubscribe via the World Wide Web, visit<BR>> https://www.moypiano.com/resources/#archives<BR>>or, via email, send a message with subject or body 'help' to<BR>> pianotech-request@ptg.org<BR>><BR>>You can reach the person managing the list at<BR>> pianotech-owner@ptg.org<BR>><BR>>When replying, please edit your Subject line so it is more specific<BR>>than "Re: Contents of Pianotech digest..."<BR>
<P>>Today's Topics:<BR>><BR>> 1. Re: Seasonal pitch change: (Jason Kanter)<BR>> 2. Re: Seasonal pitch change: (Ron Nossaman)<BR>> 3. RE: Seasonal pitch change: (David Love)<BR>> 4. Nossaman SD10-B (Bob Hull)<BR>> 5. Tech needed in San Fran area (michelle@smithpianoservice.com)<BR>> 6. Re: Tech needed in San Fran area (Randy Dinwiddie User)<BR>> 7. Re: Tech needed in San Fran area (Brooks & Yumi)<BR>> 8. Re: Nossaman SD10-B (Ron Nossaman)<BR>> 9. Re: untunable G-150 (Don Mannino)<BR>> 10. Seasonal pitch change: (RicB)<BR>> 11. Nossaman SD10-B (RicB)<BR>> 12. Verituner feedback request (R Barber)<BR>> 13. Seasonal pitch change: (RicB)<BR>> 14. RE: Seasonal pitch change: (David Love)<BR>> 15. Re: Tech needed in San Fran area (piannaman@aol.com)<BR>> 16. Re: Seasonal pitch change: (Cy Shuster)<BR>> 17. Re: Zodiac score - orchestra and solo piano (piannaman@aol.com)<BR>
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From: <I>"Jason Kanter" <jkanter@rollingball.com></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>"Pianotech List" <pianotech@ptg.org></I><BR>Subject: <I>Re: Seasonal pitch change:</I><BR>Date: <I>Sat, 10 Mar 2007 16:45:37 -0800</I><BR><BR>At the risk of sounding stupid, I am compelled to ask again: Does the cast-iron plate change its dimensions with temperature changes? The distance from tuning to hitch pins might change just as railroad tracks shrink and swell in length - no? I'm just thinking it must be a contributing factor. <BR><BR>Jason<BR><BR>
<DIV><SPAN class=gmail_quote>On 3/10/07, <B class=gmail_sendername>RicB</B> <<A href="mailto:ricb@pianostemmer.no">ricb@pianostemmer.no</A>> wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex"><snip></BLOCKQUOTE>
<DIV><BR> </DIV><BR>
<BLOCKQUOTE class=gmail_quote style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex">As you, I am also tempted to think about the break in <BR>string tension at the doglegs, and endpoints.<BR><BR></BLOCKQUOTE></DIV><BR><BR>
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From: <I>Ron Nossaman <rnossaman@cox.net></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>Pianotech List <pianotech@ptg.org></I><BR>Subject: <I>Re: Seasonal pitch change:</I><BR>Date: <I>Sat, 10 Mar 2007 19:55:53 -0600</I><BR>><BR>>>At the risk of sounding stupid, I am compelled to ask again: Does <BR>>>the cast-iron plate change its dimensions with temperature changes? <BR>>>The distance from tuning to hitch pins might change just as <BR>>>railroad tracks shrink and swell in length - no? I'm just thinking <BR>>>it must be a contributing factor.<BR>>><BR>>>Jason<BR>><BR>>Yes, it does. In the short term, temperature changes show nearly <BR>>immediate pitch changes as the strings grow or shrink. The strings <BR>>change quickly because they're of small diameter and low thermal <BR>>mass. The
thermal mass of the plate is HUGELY greater, so it <BR>>responds much more slowly to temperature changes. The fun part is <BR>>that the steel strings and the gray iron plate have a similar <BR>>thermal expansion coefficient, so after the plate reactions catch up <BR>>with the strings', the tuning isn't changed all that much.<BR>><BR>>Seasonal pitch swings are primarily wood and moisture related, <BR>>rather than temperature related.<BR>>Ron N<BR>><BR>
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From: <I>"David Love" <davidlovepianos@comcast.net></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>"'Pianotech List'" <pianotech@ptg.org></I><BR>Subject: <I>RE: Seasonal pitch change:</I><BR>Date: <I>Sat, 10 Mar 2007 17:58:16 -0800</I><BR>>The changes aren't just deflection changes. Expansion and contraction of<BR>>the case contributes some too.<BR>><BR>>David Love<BR>>davidlovepianos@comcast.net<BR>>www.davidlovepianos.com<BR>><BR>>-----Original Message-----<BR>>From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf<BR>>Of RicB<BR>>Sent: Saturday, March 10, 2007 3:41 PM<BR>>To: pianotech@ptg.org<BR>>Subject: Seasonal pitch change:<BR>><BR>>Hi John<BR>><BR>>Its true that the lower breaking % will cause a greater change in pitch<BR>>for any deflection induced change in
overall string length. But this<BR>>still doesnt account for anywhere near enough as far as I can see. Take<BR>>the following example string.<BR>><BR>>1400 mm long. 1.2 mm Ø, back length of 100 mm and front termination to<BR>>pin of 200 mm with 132 lbs of undeflected tension. That puts us at 21<BR>>pitch. A very long and very low tension string ... yes ? Assume a 0.5<BR>>mm upwards deflection by the bridge... yeilding a 0.31 ¤ string bearing<BR>>angle as a starting point. That brings tension up to 132.04 lbs, a pitch<BR>>rise of 0.267 cents and a 0.0013 mm increase in overall string length.<BR>>Now... if the board manages to push upwards at that point say 0.5 mm<BR>>more you come up to 0053 mm in overall string length increase from the<BR>>undeflected length, rises to string tension 132.16 lbs and a pitch rises<BR>>to 1.068 cents over the
undeflected pitch. Now on top of that lets say<BR>>the bridge swells such that the string climbs up the pin 0.2 mm as has<BR>>been tossed around. This yeilds an increase of 0.025 mm in string<BR>>length assuming a 20 mm wide bridge, 10 degree offset angle and 20<BR>>degree bridge pin angle. Such an increase in string length by<BR>>deflection will result in the tension rising to 132,9 lbs and a total<BR>>combined pitch change of around 5.9 cents over the undeflected pitch, or<BR>>about 5.6 cents over the nominally deflected string (0.5 mm).<BR>><BR>>So, considering both these factors, a board rise of 0.5 mm, and a string<BR>>climb up the bridge pin by 0.2 mm... we still dont see more then a 5.6<BR>>cent change in pitch for this very long very low tension string.<BR>><BR>>Its significant... but not enough. Noteworthy is that a 60 mm
string,<BR>>0.825 mm Ø, same back and front lengths at 160 lbs undeflected, a<BR>>starting string deflection of 1 mm, similiar 0.5 mm soundboard rise and<BR>>0.2 mm string climb up the pin will expericence a combined pitch change<BR>>of about 21 cents over the undeflected pitch, and around 17 cents over<BR>>the design spec deflection of 1 mm.<BR>><BR>>Seems to me that none of this can explain the pitch change patterns we<BR>>see, excepting the left / right bit with unisons. Something else has to<BR>>play a major part. As you, I am also tempted to think about the break in<BR>>string tension at the doglegs, and endpoints.<BR>><BR>>Cheers<BR>>RicB<BR>><BR>><BR>> Could it be because that's where the strings end? You have an abrupt<BR>> loss of<BR>> downward force on the bridge/soundboard, plus (if I understand what<BR>> the
Rons<BR>> and Del are saying), those strings tend to have less tension due to poor<BR>> scale design. I think Ron N was saying some days ago that his<BR>> redesigns are<BR>> not nearly as susceptible to pitch change as the original scale was.<BR>><BR>> The strings adjacent the plate struts are more prone to change during<BR>> tuning. Gotta be something to do with the lack of tension on those<BR>> portions<BR>> of the bridge at the ends of a section of strings.<BR>><BR>> JF<BR>><BR>><BR>><BR>><BR>><BR>
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From: <I>Bob Hull <hullfam5@yahoo.com></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Nossaman SD10-B</I><BR>Date: <I>Sat, 10 Mar 2007 18:20:28 -0800 (PST)</I><BR>>What can you do with a 26 year old 9' Baldwin that has<BR>>a bad pinblock, junky sound, poor treble sustain and<BR>>worn brick bat hammers? The answer for me was to<BR>>carefully craft a rebuild and design improvement<BR>>proposal for this customer so I could take it to Ron<BR>>Nossaman.<BR>><BR>>Last week I went to Wichita and picked it up with the<BR>>newly designed rib, soundboard and bridges. In our<BR>>shop we will refinish it and put new action parts on.<BR>>The action will be balanced from A0 to C8. Listening<BR>>to it even with the old hammers, that Ron had to steam<BR>>down quite a bit just to be able to get
some idea of<BR>>the sound, is a very interesting experience.<BR>><BR>>The trichords are gone; low tenor has wound strings<BR>>going to a transition bridge; board has 22 variously<BR>>radiused, laminated ribs instead of 18; greatly<BR>>increased cutoff area and fish; brass weights for<BR>>particular areas under the long bridge; heavy brass<BR>>bar across upper treble at front edge of sb.; Conklin<BR>>front duplex changed; and more...<BR>><BR>>This instrument has a great sound even with the old<BR>>hammers on. The bass absolutely kicks; the tenor<BR>>smoothly transitions between bass and plain strings;<BR>>the treble is very clean now with good sustain. I am<BR>>very pleased with the sound. It will do a great job<BR>>of filling a 1150 seat sanctuary.<BR>><BR>>Last night my son played a Prokofiev Sonata on it down<BR>>in the shop. He
was thoroughly taken with it and<BR>>wished he could do his upcoming senior recital on it<BR>>instead of on the brand new piano that is in their new<BR>>recital hall. Maybe I'll record something you can<BR>>listen to after it is finished.<BR>><BR>>I plan to install the Ronsen VSG (VFG) hammers. More<BR>>info will be forthcoming after their on.<BR>><BR>>This makes so much sense considering the results and<BR>>the money spent.<BR>><BR>>A happy camper,<BR>>Bob E. Hull<BR>><BR>><BR>><BR>><BR>>____________________________________________________________________________________<BR>>It's here! Your new message!<BR>>Get new email alerts with the free Yahoo! Toolbar.<BR>>http://tools.search.yahoo.com/toolbar/features/mail/<BR>><BR>
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From: <I><michelle@smithpianoservice.com></I><BR>Reply-To: <I>michelle@smithpianoservice.com, Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Tech needed in San Fran area</I><BR>Date: <I>Sat, 10 Mar 2007 18:20:03 -0800</I><BR>>Hi all. My husband and I are on vacation in Napa and I talked to a winery today that wants to restore a full size IBach piano.<BR>>(Are piano techs every REALLY on vacation?)<BR>><BR>>First of all, I haven't been in the business very long, and don't know the story on the IBachs. Second, can someone suggest a<BR>>good rebuilder in this area? The winery is in love with this piano and wants a quality rebuild.<BR>><BR>>Thanks for the suggestions.<BR>><BR>>Michelle Smith<BR>>Smith Piano Service<BR>>Bastrop, Texas (currently wandering the Wine Country)<BR>><BR>><BR>
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From: <I>Randy Dinwiddie User <randy_chastain@sbcglobal.net></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>"michelle@smithpianoservice.com, Pianotech List" <pianotech@ptg.org></I><BR>Subject: <I>Re: Tech needed in San Fran area</I><BR>Date: <I>Sat, 10 Mar 2007 19:18:50 -0800</I><BR>>Dale Erwin. I have an 1899 7'8" Ibach (Richard Stauss) that is wonderful and<BR>>has an interesting history. I'm going to be working on it in the next few<BR>>months. Dale would be my choice.<BR>><BR>>Randy Chastain<BR>>East Bay Area, CA<BR>><BR>><BR>>On 3/10/07 6:20 PM, "michelle@smithpianoservice.com"<BR>><michelle@smithpianoservice.com> wrote:<BR>><BR>> > Hi all. My husband and I are on vacation in Napa and I talked to a winery<BR>> > today that wants to restore a full size IBach piano.<BR>> > (Are piano techs
every REALLY on vacation?)<BR>> ><BR>> > First of all, I haven't been in the business very long, and don't know the<BR>> > story on the IBachs. Second, can someone suggest a<BR>> > good rebuilder in this area? The winery is in love with this piano and wants<BR>> > a quality rebuild.<BR>> ><BR>> > Thanks for the suggestions.<BR>> ><BR>> > Michelle Smith<BR>> > Smith Piano Service<BR>> > Bastrop, Texas (currently wandering the Wine Country)<BR>> ><BR>><BR>><BR>><BR>
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From: <I>"Brooks & Yumi" <brooksw@jps.net></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I><michelle@smithpianoservice.com>, "Pianotech List" <pianotech@ptg.org></I><BR>Subject: <I>Re: Tech needed in San Fran area</I><BR>Date: <I>Sat, 10 Mar 2007 21:01:21 -0800</I><BR>>David Love in San Francisco<BR>>Dale Fox in North Highlands (Sacramento area)<BR>>Dale Erwin in Modesto<BR>>Above are three of the best in Nothern California; especially for <BR>>total rebuilds.<BR>><BR>>Brooks Weisman RPT<BR>>Arcata & Napa, CA<BR>><BR>><BR>>Subject: Tech needed in San Fran area<BR>><BR>><BR>>>Hi all. My husband and I are on vacation in Napa and I talked to a <BR>>>winery today that wants to restore a full size IBach piano.<BR>>>(Are piano techs every REALLY on
vacation?)<BR>>><BR>>>First of all, I haven't been in the business very long, and don't <BR>>>know the story on the IBachs. Second, can someone suggest a<BR>>>good rebuilder in this area? The winery is in love with this piano <BR>>>and wants a quality rebuild.<BR>>><BR>>>Thanks for the suggestions.<BR>>><BR>>>Michelle Smith<BR>>>Smith Piano Service<BR>>>Bastrop, Texas (currently wandering the Wine Country)<BR>><BR>><BR>
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From: <I>Ron Nossaman <rnossaman@cox.net></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>Pianotech List <pianotech@ptg.org></I><BR>Subject: <I>Re: Nossaman SD10-B</I><BR>Date: <I>Sat, 10 Mar 2007 23:14:43 -0600</I><BR>><BR>><BR>><BR>>>Last night my son played a Prokofiev Sonata on it down<BR>>>in the shop. He was thoroughly taken with it and<BR>>>wished he could do his upcoming senior recital on it<BR>>>instead of on the brand new piano that is in their new<BR>>>recital hall. Maybe I'll record something you can<BR>>>listen to after it is finished.<BR>><BR>>Bob,<BR>>Thank you so much for this. I'd LOVE to have heard the Prokofiev on <BR>>the piano. You should have brought him along to pick it up, except <BR>>for being at least two hours later loading it. I'm thoroughly <BR>>willing to be
spoiled, given the chance, though the schedule <BR>>suffers.<BR>><BR>>You'll bring him along for the next one, right?<BR>><BR>><BR>>>I plan to install the Ronsen VSG (VFG) hammers. More<BR>>>info will be forthcoming after their on.<BR>><BR>>I hope so. I like to know how my three legged children ultimately <BR>>turn out after they're hauled off in locked transport. With a real <BR>>set of hammers on it, I expect it'll be as 9' a piano as, or more <BR>>then, pretty much anything out there. Wish I was there for the <BR>>christening.<BR>><BR>><BR>>>This makes so much sense considering the results and<BR>>>the money spent.<BR>><BR>>I sure think so.<BR>><BR>><BR>>>A happy camper,<BR>>>Bob E. Hull<BR>><BR>>That's the intent, as always.<BR>><BR>>Thanks Bob,<BR>>Ron N<BR>><BR>
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From: <I>Don Mannino <donmannino@ca.rr.com></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>Pianotech List <pianotech@ptg.org></I><BR>Subject: <I>Re: untunable G-150</I><BR>Date: <I>Sat, 10 Mar 2007 22:51:05 -0800</I><BR><BR>Dave,<BR><BR>Yes, as I recall there are two zinc string rests in some pianos. One under the capo, and one as the counter bearing. They are unpainted metal, but are not as shiny as the usual chrome rear aliquot bars.<BR><BR>DM<BR><BR>At 10:04 AM 3/10/2007, you wrote:<BR>
<BLOCKQUOTE class=cite cite=""><FONT face="Arial, Helvetica" size=2>>></FONT>Some YC grands from around 1993-4 had a stepped zinc insert that was <BR>extremely sticky. These were only in production for less than a year <BR>because they were horrible to tune even when brand new.<<<BR> <BR>What excactly is this stepped zinc insert? Is it also on the bottom of the V bar instead of the rod?<BR> <BR>I used protech VERY liberally, more so than I would usually want to admit, and no, the strings are not rusty.<BR> <BR> <BR>How about that "chrome plated" duplex-like bridge just forward of the tuning pins. This thing looks like trouble to me.<BR> <BR>Thanks for the responses, everyone.<BR> <BR>Dave Bunch<BR><FONT face="Arial, Helvetica" size=2></FONT></BLOCKQUOTE><BR><BR>
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From: <I>RicB <ricb@pianostemmer.no></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Seasonal pitch change:</I><BR>Date: <I>Sun, 11 Mar 2007 09:26:03 +0100</I><BR>>Hi Jason<BR>><BR>>Everything reacts to temperature changes. Metal does too. So no <BR>>doubt the plate does change its dimensions some. But no-one has even <BR>>come close to measuring the effect this eventually has on tunings. <BR>>Nor has anyone looked at what degree any change in rim height, or <BR>>other case dimensions can effect tuning.<BR>><BR>>In the end tho basically one (or both) of two things can happen seen <BR>>from the strings perspective. Either the speaking length is altered <BR>>due to a shift in the relative positions of the two terminations to <BR>>one another, or something can cause a change in the over
length of <BR>>the string. A tilt in the bridge could effect the former, bridge <BR>>deflection changes can affect the later. Pin block tilting could <BR>>also effect the later tho I dont think anyone has shown this <BR>>actually does happen.<BR>><BR>>My approach is to take a look at what results in any specific <BR>>assumed change. And both of the ones we've looked at so far dont <BR>>seem to account for the pattern of out of tuneness that we see <BR>>occuring. I cant help but thinking that there is something more <BR>>significant going on at bridge endpoints and breaks then has been <BR>>tabled so far. But who knows ?<BR>><BR>>Cheers<BR>>RicB<BR>><BR>><BR>> At the risk of sounding stupid, I am compelled to ask again: <BR>>Does the<BR>> cast-iron plate change its dimensions with temperature changes? <BR>>The<BR>>
distance<BR>> from tuning to hitch pins might change just as railroad tracks<BR>> shrink and<BR>> swell in length - no? I'm just thinking it must be a <BR>>contributing<BR>> factor.<BR>><BR>> Jason<BR>><BR>><BR>
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From: <I>RicB <ricb@pianostemmer.no></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Nossaman SD10-B</I><BR>Date: <I>Sun, 11 Mar 2007 09:28:55 +0100</I><BR>>It would be really cool to hear recordings of the instrument Bob. I <BR>>love it when folks put up recordings of pianos they've worked on.<BR>><BR>>Cheers<BR>>RicB<BR>><BR>><BR>> Last night my son played a Prokofiev Sonata on it down<BR>> in the shop. He was thoroughly taken with it and<BR>> wished he could do his upcoming senior recital on it<BR>> instead of on the brand new piano that is in their new<BR>> recital hall. Maybe I'll record something you can<BR>> listen to after it is finished.<BR>><BR>><BR>
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From: <I>R Barber <bassooner42@yahoo.com></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Verituner feedback request</I><BR>Date: <I>Sun, 11 Mar 2007 03:30:55 -0700</I><BR>>I'd like to say this style sounded great on a nice 1980's Yamaha U1 <BR>>I tuned today. I agree with the comments about the contra-bass <BR>>octave, and will add that the 4th and 5th octave finally came to the <BR>>fore in the U1, at least to my ears.<BR>>Richard Barber<BR>>Morgan Hill, CA<BR>><BR>>>Verituner feedback request<BR>>>Ron Koval drwoodwind at hotmail.com<BR>>>Wed Mar 7 08:52:41 MST 2007<BR>>><BR>>>Hi Everyone -<BR>>><BR>>>I just wanted to throw an early update to my Verituner style <BR>>>feedback request...<BR>>>While the public traffic has been slim, I have
recieved a number of <BR>>>encouraging notes:<BR>>><BR>>>"...using as my default style. I like it very much"<BR>>><BR>>>" …just got home from tuning the big 9-footer at the college <BR>>>(Yamaha CFIII). I used Koval One-for-All and ET, and I think it’s <BR>>>beautiful. "<BR>>><BR>>>"Simply put, it realizes the harmony and the voices really well. <BR>>>That's what a tuning is for."<BR>>><BR>>>"I used your custom style for 4 differents pianos today and was <BR>>>very pleased with the results. Super duper clean."<BR>>><BR>>>"The piano has a much more playable range than it had before. I can <BR>>>play chords through the low mid section with confidence. Before, <BR>>>there was a noticeable difference in the break. The entire tuning <BR>>>has a very "tight" sound and the bass strings
fit the chords <BR>>>perfectly."<BR>>><BR>>>"But one thing I really like about your new style is the low <BR>>>octave. Except for big pianos, I have never relied on the VT there <BR>>>until now."<BR>>><BR>>>So far, only one negative - I think he's re-checking the numbers <BR>>>and will try again.<BR>>><BR>>>********<BR>>><BR>>>I also got a few notes from those who hope to give it a try soon. <BR>>>Thanks!<BR>>><BR>>>A few people ran into trouble getting the style into the box -<BR>>><BR>>>The shorthand I use, for example: A0 6:3 35% / 8:4 65% would look <BR>>>more like this on the box:<BR>>><BR>>>A0<BR>>><BR>>>6:3 OCT<BR>>>0.00<BR>>>35%<BR>>><BR>>>8:4 OCT<BR>>>0.00<BR>>>65%<BR>>><BR>>>Every setpoint should have
two intervals listed. Once again, <BR>>>here's the style for anyone that's willing to give it a try:<BR>>><BR>>>A0 6:3 35% / 8:4 65%<BR>>><BR>>>A1 6:3 20% / 4:1 80%<BR>>><BR>>>C#3 6:3 30% /4:2 70%<BR>>><BR>>>A3/A4 4:2 77% / 2:1 23%<BR>>><BR>>>C#6 4:1 10% /4:2 90%<BR>>><BR>>>A6 4:1 63% / 4:2 37%<BR>>><BR>>>C8 4:1 90% /2:1 10%<BR>>><BR>>>Thanks -<BR>>>Ron Koval<BR>>>Chicagoland<BR>>><BR>><BR>
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From: <I>RicB <ricb@pianostemmer.no></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Seasonal pitch change:</I><BR>Date: <I>Sun, 11 Mar 2007 12:19:25 +0100</I><BR>>As I have shown, this lower tension thing... which is really lower % <BR>>of breaking strength (which in itself turns out to be a rather <BR>>dubious term in practice) doesnt really account for the large <BR>>differences / uneveness in pitch change through out the scale. Tho <BR>>no doubt it plays what can be called a significant roll. I'm working <BR>>on a combination of a basic scaling spreadsheet and the deflection / <BR>>tension changes spreadsheet along with this last bit about pin <BR>>angles and strings climbing them (which I am glad to see finnally <BR>>acknowledged) to show the isolated effect of such changes on real
<BR>>scales. I think one will see a suprising picture develop, and one <BR>>that very much deviates from what we observe. Which means that <BR>>other quite significant forces (for not to say dominant) are at <BR>>work, which to some degree must counter act and to some degree work <BR>>in concert these weve been discussing.<BR>><BR>>I dont know of any data at all that supports the claim that scales <BR>>designed with more equal tension through the piano will tend to go <BR>>out of tune more evenly. Is this casual observation based or can <BR>>you point me to some specific study ?<BR>><BR>>Cheers<BR>>RicB<BR>><BR>><BR>> The lower the tension in a given string the greater the change <BR>>in<BR>> pitch for<BR>> a given change in length. Since the lowest tension tends to be <BR>>in<BR>> the low<BR>> tenor, that is where the
largest change in pitch generally is. <BR>>The bass<BR>> section is usually the highest string tension and therefore <BR>>changes the<BR>> least. On many pianos the scale tensions also drop in the upper <BR>>treble.<BR>> Scales that are designed with more equal tension through the <BR>>piano<BR>> will tend<BR>> to go out of tune more evenly.<BR>><BR>><BR>> David Love<BR>> davidlovepianos at comcast.net<BR>> www.davidlovepianos.com<BR>><BR>><BR>
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From: <I>"David Love" <davidlovepianos@comcast.net></I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>"'Pianotech List'" <pianotech@ptg.org></I><BR>Subject: <I>RE: Seasonal pitch change:</I><BR>Date: <I>Sun, 11 Mar 2007 07:33:57 -0700</I><BR>>Even so called "equal tension" scales are not really equal tension as there<BR>>are variations within each gauge section. I would imagine there are a<BR>>confluence of factors: case, soundboard, bridge, plate expansion and<BR>>contraction, friction, scale tension/break point variability.<BR>>Interestingly, even 100 years ago in the discussions of the major<BR>>manufacturers of the day catalogued in "Piano Tone Building" edited by Del<BR>>Fandrich, there is reference to string tension as a factor in tuning<BR>>stability. Let me know when you figure it out though. As Bill Ballard
is<BR>>fond of quoting: "I gotta go to woik".<BR>><BR>>David Love<BR>>davidlovepianos@comcast.net<BR>>www.davidlovepianos.com<BR>><BR>>-----Original Message-----<BR>>From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf<BR>>Of RicB<BR>>Sent: Sunday, March 11, 2007 4:19 AM<BR>>To: pianotech@ptg.org<BR>>Subject: Seasonal pitch change:<BR>><BR>>As I have shown, this lower tension thing... which is really lower % of<BR>>breaking strength (which in itself turns out to be a rather dubious term<BR>>in practice) doesnt really account for the large differences /<BR>>uneveness in pitch change through out the scale. Tho no doubt it plays<BR>>what can be called a significant roll. I'm working on a combination of a<BR>>basic scaling spreadsheet and the deflection / tension changes<BR>>spreadsheet along with this last
bit about pin angles and strings<BR>>climbing them (which I am glad to see finnally acknowledged) to show the<BR>>isolated effect of such changes on real scales. I think one will see a<BR>>suprising picture develop, and one that very much deviates from what we<BR>>observe. Which means that other quite significant forces (for not to<BR>>say dominant) are at work, which to some degree must counter act and to<BR>>some degree work in concert these weve been discussing.<BR>><BR>>I dont know of any data at all that supports the claim that scales<BR>>designed with more equal tension through the piano will tend to go out<BR>>of tune more evenly. Is this casual observation based or can you point<BR>>me to some specific study ?<BR>><BR>>Cheers<BR>>RicB<BR>><BR>><BR>> The lower the tension in a given string the greater the change in<BR>> pitch
for<BR>> a given change in length. Since the lowest tension tends to be in<BR>> the low<BR>> tenor, that is where the largest change in pitch generally is. The bass<BR>> section is usually the highest string tension and therefore changes the<BR>> least. On many pianos the scale tensions also drop in the upper treble.<BR>> Scales that are designed with more equal tension through the piano<BR>> will tend<BR>> to go out of tune more evenly.<BR>><BR>><BR>> David Love<BR>> davidlovepianos at comcast.net<BR>> www.davidlovepianos.com<BR>><BR>><BR>><BR>><BR>><BR>
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From: <I>piannaman@aol.com</I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>pianotech@ptg.org</I><BR>Subject: <I>Re: Tech needed in San Fran area</I><BR>Date: <I>Sun, 11 Mar 2007 10:35:12 -0400</I><BR><BR>
<DIV><SPAN style="DISPLAY: inline-block"></SPAN>Michelle,</DIV>
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<DIV>I've heard good things about David Love and Dale Fox. </DIV>
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<DIV>I have seen Dale's work and he does pretty amazing things.</DIV>
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<DIV>Somebody else I'd put on the list is Jeffrey Potter, who lives in Santa Cruz. He does great work. He rebuilt my piano several years ago--in my "previous" life--and I enjoy the results on a daily basis.</DIV>
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<DIV>Have a great vacation. Which winery is it that has the Ibach? I'm heading up to Napa in May for a little R and R and I'd like to check it out.</DIV>
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<DIV>Thanks,</DIV>
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<DIV style="CLEAR: both">Dave Stahl<BR><BR></DIV> <BR>-----Original Message-----<BR>From: brooksw@jps.net<BR>To: michelle@smithpianoservice.com; pianotech@ptg.org<BR>Sent: Sat, 10 Mar 2007 9:01 PM<BR>Subject: Re: Tech needed in San Fran area<BR><BR>
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<DIV class=AOLPlainTextBody id=AOLMsgPart_0_cbee10ed-e487-498e-a787-39492eaecbe3>David Love in San Francisco <BR>Dale Fox in North Highlands (Sacramento area) <BR>Dale Erwin in Modesto <BR>Above are three of the best in Nothern California; especially for total rebuilds. <BR> <BR>Brooks Weisman RPT <BR>Arcata & Napa, CA <BR> <BR>Subject: Tech needed in San Fran area <BR> <BR>> Hi all. My husband and I are on vacation in Napa and I talked to a winery > today that wants to restore a full size IBach piano. <BR>> (Are piano techs every REALLY on vacation?) <BR>> <BR>> First of all, I haven't been in the business very long, and don't know the > story on the IBachs. Second, can someone suggest a <BR>> good rebuilder in this area? The winery is in love with this piano and > wants a quality
rebuild. <BR>> <BR>> Thanks for the suggestions. <BR>> <BR>> Michelle Smith <BR>> Smith Piano Service <BR>> Bastrop, Texas (currently wandering the Wine Country) <BR> <BR></DIV>
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From: <I>"Cy Shuster" <cy@shusterpiano.com></I><BR>Reply-To: <I>Cy Shuster <cy@shusterpiano.com>, Pianotech List <pianotech@ptg.org></I><BR>To: <I>"Pianotech List" <pianotech@ptg.org></I><BR>Subject: <I>Re: Seasonal pitch change:</I><BR>Date: <I>Sun, 11 Mar 2007 08:44:07 -0600</I><BR>>At North Bennet Street, David Betts told me they once put a jack <BR>>under a piano they were about to tear down, and put pressure on the <BR>>soundboard from below. Even with significant force, no pitch change <BR>>was detected.<BR>><BR>>Time for more Real World experiments, methinks...<BR>><BR>>--Cy--<BR>><BR>><BR>
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From: <I>piannaman@aol.com</I><BR>Reply-To: <I>Pianotech List <pianotech@ptg.org></I><BR>To: <I>schecter@pacbell.net, pianotech@ptg.org</I><BR>Subject: <I>Re: Zodiac score - orchestra and solo piano</I><BR>Date: <I>Sun, 11 Mar 2007 10:44:23 -0400</I><BR><BR>
<DIV>Thanks for the headsup, Mark! That's gotta be exciting for you. Don't think I'd see the movie without knowing this info, as it's not exactly my cup o' tea...but now I have a good reason to check it out.<SPAN style="DISPLAY: inline-block"></SPAN></DIV>
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<DIV>Congrats!</DIV>
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<DIV style="CLEAR: both">Dave Stahl<BR><BR>Dave Stahl Piano Service<BR>650-224-3560<BR>dstahlpiano@sbcglobal.net<BR>http://dstahlpiano.net/<BR><BR><BR><BR></DIV>
<DIV> </DIV> <BR>-----Original Message-----<BR>From: schecter@pacbell.net<BR>To: pianotech@ptg.org<BR>Sent: Sat, 10 Mar 2007 11:33 AM<BR>Subject: Zodiac score - orchestra and solo piano<BR><BR>
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<DIV class=AOLPlainTextBody id=AOLMsgPart_0_b5ad4584-6694-4045-9db2-c8aa1981bef7>Hi, all. <BR> <BR>Well, I've seen Zodiac now, and I can finally breathe again. Living in <BR>the Bay Area, where the real story took place, we've been inundated with <BR>press about the movie. I don't know if it's been as prominently hyped <BR>elsewhere, but it's playing everywhere around here. (I'm based in Oakland, which didn't really figure in to the story.) <BR> <BR>The score, composed by David Shire, was recorded at Skywalker Sound, <BR>where I maintain the pianos, a Bluthner concert grand, and a Yamaha <BR>CFIIIS. The CFIIIS is used throughout the score, both in ensemble with <BR>the orchestra, and especially thrilling for me, in several meaty solo <BR>piano cues, including the end credits. All piano parts were performed by <BR>the
composer. <BR> <BR>I thought the movie was really well done, with excellent acting, fine <BR>cinematography, and plenty of suspense, even if you think you already <BR>know the outcome. Lots of shots of San Francisco, various bridges, and <BR>locales around the Bay. Now that I've heard it, I'll have to go back and <BR>watch it again! (Warning: there is some graphic violence.) <BR> <BR>In case any of you all get out to see the movie, I would be very <BR>interested to hear any comments, criticisms and reactions you might <BR>have to anything regarding the instrument, the recording, or the <BR>composition by David Shire and how it worked to underscore the drama. <BR>Thanks, and I hope you enjoy it! <BR> <BR>-Mark Schecter <BR> <BR> <BR></DIV>
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