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Damper Wire Offset By The Strut

8/8/2025

 
This is a figured-out-by-self note after all sorts of failures and damages. I do wish to learn how factories and other workshops offset the wires by the plate strut. What damages have been made? All that one can think of.
(German practice on the first paragraph: Diese Methode habe ich selbst herausgefunden. Ich möchte gerne erfahren was die Manufakturen und die andere Werkstätten machen. Ich habe so viele Teile zerstört, die man sich vorstellen kann.)

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Lesson from a Little Tree

7/27/2025

 
Gypsy moths and their caterpillars eat and kill plantations. Often in springs, those spongy moth nests appear on plants, especially on trees. The caterpillars inside feast on the beautiful greens till the plant is killed. Here is an article about it: 
https://tompkinsweekly.com/articles/what-to-do-before-before-spongy-moths-damage-your-trees-irreplaceably/
​

There is one little tree in the barrier in between the lanes on route 128. It is a little over one meter tall. Early in the spring, it was covered with those spongy moth nests. It was very scary to look at. 

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Sharpen Bits with Files

7/5/2025

 
This sharpening method for drill bits and router bits is taught by John Cameron, fine cabinet maker. After several uses of a drill bit, find a very fine file or a diamond stone, slowly file against the top surface of the drill bit until the rust or the unevenness is gone and the tip reflects a little light. Do not tilt the file or stone.

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Two News Sites for Beginner German Learners

6/28/2025

 
At the end of A1 level German language learning, I found these two news sites from Germany very helpful and easier to understand than other news broadcasts for German learners. One can understand over 50% of the content at A1 level and higher. 

These broadcasts are made for people with reading, hearing, understanding, and/or other difficulties, as well as German language learners. Each report is short and and maybe provided with word explanations. It feels nice to learn and grow a little bit each day. Here they are. Happy learning!

Tagesschau in Einfacher Sprache:
https://www.tagesschau.de/multimedia/sendung/tagesschau_in_einfacher_sprache
Nachrichten in Leichter Sprache:
https://www.mdr.de/nachrichten-leicht/nachrichten-in-leichter-sprache-114.html

Damper Timing

6/28/2025

 
When pressing the sustain pedal, the dampers shall rise at the same time as a union. This timing adjustment method is from David Betts. Usually the process takes 1-2 hours when the dampers, wires, and regulation are in decent shape.

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Damper System Installation Practice

5/26/2025

 
It all starts from nightmares that the damper system was put in wrong, or the parts were broken in pieces, and there were dust in the package where worms crawled everywhere eating and chewing happy.

​We try our best to replicate the backaction exactly as the original unless where were flaws in the old system. Every screw hole has to be marked and drilled precisely and spaced evenly. Usually music, podcast, or any distractions are banned for the day. The assembly process takes about 8 hours. This is a Renner Backaction. The assembly training material can be found on the Renner USA website :
ttps://rennerusa.com/training-manuals/

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Bobbling Hammers and Tight Key Bushings on a Yamaha

4/26/2025

 
This piano has hammers bobbling on the strings. The front key bushings and balance bushings are tight causing keys not able to return or bounce back up. 

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Rib Crowning Practice

4/19/2025

 
Jude, the shop owner, uses several species of softwood for ribs. One piano usually has two kinds depends on the area, load, and more. After his calculation of ribs on each piano, we start the milling process. Each time of milling is a new practice. And each time is nerve racking to make it right, or almost right.

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German Language Learning Resource

4/12/2025

 
It has been eight months since I started learning German. The initial idea was to be able to go to piano factories in Germany someday to learn this craft in depth and in the traditional ways. This has not been changed. 

​I have searched crazily on the internet for the best affordable ways of learning, browsed many Youtube channels that looked decent, attended online group classes held by teachers in Germany. There were learning platforms difficult to navigate, teachers that were hard to feel a connection with, and also teachers who did not prepare the lessons well or who's lessons were not in good flow. Here is a note to myself and to learners alike who are looking for a dedicated German language teacher. ​

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Could you please bang on the keys?

2/22/2025

 
John Cameron is a very fine woodworker. He designs and makes artisan furniture, wood and metal engraving, boat building, etc. Soon, one of his works will be exhibited at Smithsonian Institute this summer. He is also a passionate Jazz pianist who plays gigs all around town. Some years ago, a friend of his was throwing out an old beat up Baldwin grand piano. Somehow he was informed and took this piano. Now Miss Baldwin sits happily in his woodworking shop getting exercises/PT  every day. Good for her ol' joints. 

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Practice Bridge Notching

1/30/2025

 
This is the third bridge notching job since graduation from North Bennet Street School in 2016. It took a whole week of anxiety to have the mind almost prepared. Don't ask what crazy things happened on the bridge in my dreams. Pretty bad. No matter how unprepared the mind is, when the time comes, the job has to be done.

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Reflection 2024

12/25/2024

 
The year of 2024 is another year of learning, failing, learning, failing, etc. Two steps forward, one step back, sometimes many steps back. Some piano skills are improved and some woodworking skills have just started. 

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A New Language

11/23/2024

 
It is never too late to learn a new language. Many people say so. During the 2024 Annual Convention of Piano Technicians Guild, I chatted with Mr. Andreas Harke from Jahn Piano Teile, Germany, only to find out my view of piano world is too limited. Having been working in this industry for almost 10 years, I have barely thought about this powerful instrument was invented and first manufactured in Europe in the 1700s, many traditional factories in Germany. Maybe someday, there would be a chance to go to one factory or two to study with professional piano builders and engineers. Language is essential for skill acquisition, thus the decision to learn German. So the journey started in August 2024.

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Family Trip 全家出动游江南

8/18/2024

 
自我出生以来,爸爸和兄弟们从没有一起旅游过。叔叔伯伯们为国家,也为自己的小家在祖国的各个角落忙奉献,忙事业,今年在西安,明年在深圳,后年又跑到武汉。每年也就中秋和春节在爷爷奶奶家聚餐,聊家常。这些年,大家陆陆续续退休了,儿女也自立了,不用拼老命做事情了,于是哥儿四个规划了下江南,在上海附近旅游的十天行程。四十年过去,终于能一起享乐一番。

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That B Sticks

7/30/2024

 
Eight o'clock on Sunday night, the phone rang, "Hi this is Sammie, I have a Yamaha piano. The B has been stuck since last week. It is very urgent. Can you come to fix it?"

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