The recent discussions in the threads "Return to Vinyl" and "Contactless Vinyl Playback" has answered many questions, yet some things still remain somewhat of a mystery.
To get to know how something works, sometimes it is useful to try to create a model, a model airplane, or a 3D model or drawing. Suggestions to 'add your own tone arm' and members projects have been encouraging.
Images below are taken from screenshots of a 3D model I created for the listening area discussion. The layout is close to what I would like to have in a turntable, simple, block shaped plinth, with a single speed belt drive. There are other discussions, which I will link here, however, few of them have any 3D illustrations and discussions of design.
Significantly, today, June 7, is the birth anniversary of
To get to know how something works, sometimes it is useful to try to create a model, a model airplane, or a 3D model or drawing. Suggestions to 'add your own tone arm' and members projects have been encouraging.
Images below are taken from screenshots of a 3D model I created for the listening area discussion. The layout is close to what I would like to have in a turntable, simple, block shaped plinth, with a single speed belt drive. There are other discussions, which I will link here, however, few of them have any 3D illustrations and discussions of design.
Significantly, today, June 7, is the birth anniversary of
Attachments
"n 1870, along with her mother and siblings, Blow went abroad to Europe; while there she began studying the philosophies of Hegel and the American Transcendentalists. However, while abroad she came across the kindergarten teaching methods of German idealist and philosopher Friedrich Fröbel. Fröbel believed in "learning-through-play" and cognitive development. Susan was inspired to bring these ideas back to St. Louis and her father offered to set up a kindergarten as a private school. Susan felt she could better serve children through the public school system" (Wikipedia)
The word itself comes from Fröbel.
And while we are at it: Therese Brunsvik was the founder of a nursery school in Hungary in 1828. The pre-school institution became famous all over Hungary and in 1837, Friedrich Fröbel founded the first "kindergarten" in Germany.
Well, she has a loose relation to audio, more precisely music, too. Beethoven spent some time in the home of Therese's family, and allegedly fell in love with her. It is said she was the "immortal beloved" to whom he wrote the Piano sonata No.24 in F♯ major, Opus 78. Anyway, Beethoven's original piano can be seen at Martonvasar, Hungary where the Brunsvik family lived. The kindergarten too, along with period furniture and toys.
https://en.wikipedia.org/wiki/Therese_Brunsvik
Well, she has a loose relation to audio, more precisely music, too. Beethoven spent some time in the home of Therese's family, and allegedly fell in love with her. It is said she was the "immortal beloved" to whom he wrote the Piano sonata No.24 in F♯ major, Opus 78. Anyway, Beethoven's original piano can be seen at Martonvasar, Hungary where the Brunsvik family lived. The kindergarten too, along with period furniture and toys.
https://en.wikipedia.org/wiki/Therese_Brunsvik
Let's start with the plinth and the motor. The motor is attached using screws to two long L- shaped structural pieces, which will also locate the platter and hub.
No doubt there are better methods, like a cast aluminum former to attach both.
Here is a Creative Commons image of a Panasonic. Uses one large rectangular block to locate everything.
https://upload.wikimedia.org/wikipe...G-J555_Turntable_dismantled_(26353215637).jpg
tony_duell, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons
No doubt there are better methods, like a cast aluminum former to attach both.
Here is a Creative Commons image of a Panasonic. Uses one large rectangular block to locate everything.
https://upload.wikimedia.org/wikipe...G-J555_Turntable_dismantled_(26353215637).jpg
tony_duell, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons
To get started, some good background to drive systems and motors.
https://fromvinyltoplastic.com/vinyl-turntable-drive-techniques/
I am aware that there are several threads here about DIY turntable, arms, I will post the links here when I find them.
I like this design:
https://www.trutone.ca/products/vie...carbon-aluminium-sandwich-tonearm-eucalyptus-
https://fromvinyltoplastic.com/vinyl-turntable-drive-techniques/
I am aware that there are several threads here about DIY turntable, arms, I will post the links here when I find them.
I like this design:
https://www.trutone.ca/products/vie...carbon-aluminium-sandwich-tonearm-eucalyptus-
It is difficult to buy only the platter, so one option may be to buy a cheap player with the platter, motor, motor controller, and then upgrade the tonearm.
Maybe even the USB turntable I have, though it has a small platter. Besides destroying records, all I have to worry about is wow and flutter. A new tonearm should keep my records safe.
"Victrola record player" by Ben P L is licensed under CC BY-SA 2.0.
Maybe even the USB turntable I have, though it has a small platter. Besides destroying records, all I have to worry about is wow and flutter. A new tonearm should keep my records safe.
"Victrola record player" by Ben P L is licensed under CC BY-SA 2.0.
Preliminary design. Wooden base, aluminum plate for locating the top section of the motor and main bearing. The motor controller is the critical component here. I have located some '9V DC motors' and 'PWM' controllers for electric motors, but no way of knowing how accurate they are. The standard Victrola fare should do for the moment. Or the Crosley (See image in step 3). These are just plans, it would be difficult for the wood work to be done here, maybe.
https://www.ifixit.com/Guide/Crosley+CR704+Drive+Belt+Replacement/19424
An option is to obtain a vintage player and use the parts: platter should be alright, the motor may be replaceable, and the motor control circuit also may be available.
Crosley CR8005F-TN Cruiser $49.96 List: $89.95 90 days FREE. Terms apply. $43.53 delivery Ships to Maldives
https://www.ifixit.com/Guide/Crosley+CR704+Drive+Belt+Replacement/19424
An option is to obtain a vintage player and use the parts: platter should be alright, the motor may be replaceable, and the motor control circuit also may be available.
Wireframe. Reviews of Crosleys and Victrolas does not seem to display any wow on YouTube, or it is undetectable, surely it should come through YouTube.
In this case, I could use the mechanicals for Phase 2.
In this case, I could use the mechanicals for Phase 2.
I am glad you asked:
1. To learn about the design, operation, and construction of turntables by obtaining information on how to assemble a turntable from parts.
2. To explore design ideas for turntables and turntable arms and arm bearings
3. To help choose a turntable that incorporates some of the desired features and options for upgrades.
I think the project is moving along.
1. To learn about the design, operation, and construction of turntables by obtaining information on how to assemble a turntable from parts.
2. To explore design ideas for turntables and turntable arms and arm bearings
3. To help choose a turntable that incorporates some of the desired features and options for upgrades.
I think the project is moving along.
For designing a decent turntable, you have to consider many things apart from the look:
Vibration propagation in rigid structures
Vibration isolation
Vibration damping, suspension
Keeping angular velocity fluctuation below a certain level
Creating low friction low noise low speed bearing
Platter material and mass (related to all above)
Platter balancing
Selecting good horizontal/vertical arm bearing +geometry
Calculating arm geometry, overhang, etc.
Good antiskating mechanism
Arm cabling
If belt drive: platter edge or subplatter
Platter mat selection
If you chose any of these ad hoc, the result could be suboptimal or disappointing.
Vibration propagation in rigid structures
Vibration isolation
Vibration damping, suspension
Keeping angular velocity fluctuation below a certain level
Creating low friction low noise low speed bearing
Platter material and mass (related to all above)
Platter balancing
Selecting good horizontal/vertical arm bearing +geometry
Calculating arm geometry, overhang, etc.
Good antiskating mechanism
Arm cabling
If belt drive: platter edge or subplatter
Platter mat selection
If you chose any of these ad hoc, the result could be suboptimal or disappointing.
So true! Vibrational modes of pretty much everything affect the sound you get.
https://scholar.google.com/scholar?...ion+paper&hl=en&as_sdt=0&as_vis=1&oi=scholart
https://scholar.google.com/scholar?...ion+paper&hl=en&as_sdt=0&as_vis=1&oi=scholart
Hi,
Wish you to achieve all your goals on this project, but to me seems a pretty long long shot if you start from a blank paper.
Just to mention very few items:
Tonearm it is itself a jungle......
Drive system another jungle and pretty costly even in the DIY area if you aim to very good results.
Bearing most probably even if custom made is not so cheap in the end as require precise lathe and good material selection
Matching the drive system to a good inertia platter with good material is another combined jungle as it also involve the drive torque....
Plinth material and floating plinth or not ?
Belt drive? Single belt and single motor? Single belt and double motor? Single motor and fly wheel and ....xxxxx...... belt?
.......
Rgds
Adelmo