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Post by flamethrower1 on Feb 17, 2017 19:46:14 GMT -5
So I am starting a new deck project. Inspired by Transrotor and Clear Audio decks. The plinth is going to be three layers of 1 inch acrylic, 1/2 inch aluminum and another layer of 1 inch acrylic. I have the basic design laid out for the plinth. Next step is off to a friend of mine to make a DXF file and then to the machine shop. Will be using an Audiomods Series Five arm and cartridge yet to be determined. Attachments:
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Post by leonski on Mar 18, 2017 23:00:28 GMT -5
Any thought given to making th platter out of more than 3 layers of 2 different materials? Multiple layers which ALONE might resonate can be sized to DAMP one another out and produce a very very low sum resonant frequency result. Any specific material in mind for the Plinth? Maybe Corian? That stuff is about as inert as you can imagine and is dense / heavy. Use 2 layers of corian with a RECESS machined in one to accept a sheet of lead. Compress and GLUE for a one-piece look with almost Zero chance of a resonant mode. Pre-Drilling all the holes for motor mount, cables and tonearm would be important to isolate the lead from being drilled. You want such a sheet totally covered. www.dupont.com/products-and-services/construction-materials/surface-design-materials/brands/corian-solid-surfaces.htmlAnother RADIAL approach to a plinth would be to CAST one out of fine grain CONCRETE. Surface aggregate ground to visibility would provide an incredible and unique surface. I'd use broken Coke Bottle Glass, but there are literally dozens of other good choices. www.concretecountertopinstitute.com/forming-for-ascast-vs-polished-finishes/You could even make it look like Granite or perhaps Soapstone (another choice!) Update with some more photos as work progresses. |
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Post by vneal on Mar 19, 2017 8:36:16 GMT -5
Not sure Granite or Concrete is best for turntables. Years ago I bought one of those solid granite isolation tables made by Starrett that is normally used for anti vibration sensitive microscopes. The sound was awful. Never tried granite anywhere near audio again
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Post by leonski on Mar 19, 2017 12:34:51 GMT -5
I think Corian is maybe where it's at these days: A synthetic material of high density but still fairly easy to work. www.lencoheaven.net/forum/index.php?topic=8852.0An alternative material might be SOAPSTONE. This has nothing to do with Granite which I'd agree doesnt' always sound 'best'. I think it may be the quartz which is a piezoelectric material. Much controversy ensues. Soapstone, OTOH is a 'Talc' and has no quartz. It is also somewhat softer, easier to 'carve' and makes a terrific stainproof countertop. Your lab tables in school, if old enough, might have been made from Soapstone. I'm not sure about concrete, either. That would be a real experiment. DIY casting and finishing is a PIA but can produce some real neat results. We had a LOT of gear where I worked built on Ultra-Flat granite slabs. Of the foot-thick type weighing a LOT. Ultra-Flat? Within a couple Tenths of Thousandths of an inch across a 3foot x 4foot piece. $$$$$ |
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Post by frenchyfranky on Mar 19, 2017 12:39:48 GMT -5
Not sure Granite or Concrete is best for turntables. Years ago I bought on of those solid granite isolation tables made by Starrett that is normally used for anti vibration sensitive microscopes. The sound was awful. Never tried granite anywhere near audio again Two inches thick Granite stones under speakers are the most effective things I found for decoupling them from the wood floor structure of the house.  |
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Post by frenchyfranky on Mar 19, 2017 12:50:17 GMT -5
flamethrower1 I am very impatient to see the final project. I'm impressed by the skills you have to achieve this type of project. Please keep showing pictures​ to the voyeur I am.
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Post by frenchyfranky on Mar 19, 2017 14:06:38 GMT -5
So I am starting a new deck project. Inspired by Transrotor and Clear Audio decks. The plinth is going to be three layers of 1 inch acrylic, 1/2 inch aluminum and another layer of 1 inch acrylic. I have the basic design laid out for the plinth. Next step is off to a friend of mine to make a DXF file and then to the machine shop. Will be using an Audiomods Series Five arm and cartridge yet to be determined. I really fall in love with this 3 or 4 inches ? thick platter... Very cool and must be and ideal inert material and giving anough inertia mass for an extremely low wow and flutter. Well made. |
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Post by Boomzilla on Mar 19, 2017 16:56:48 GMT -5
You WIMP! Why not 3D-print yourself a tonearm of your own design? If you're going for home-made, go all the way or go home.  |
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Post by leonski on Mar 19, 2017 19:55:24 GMT -5
So I am starting a new deck project. Inspired by Transrotor and Clear Audio decks. The plinth is going to be three layers of 1 inch acrylic, 1/2 inch aluminum and another layer of 1 inch acrylic. I have the basic design laid out for the plinth. Next step is off to a friend of mine to make a DXF file and then to the machine shop. Will be using an Audiomods Series Five arm and cartridge yet to be determined. I really fall in love with this 3 or 4 inches ? thick platter... Very cool and must be and ideal inert material and giving anough inertia mass for an extremely low wow and flutter. Well made. My 2nd to last TT was a DUAL 1209. Platter was a 2-piece affair either of which Alone would 'ring'. But together? Very inert and what ended up to be a very low resonant frequency. |
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Post by leonski on Mar 20, 2017 2:51:52 GMT -5
You WIMP! Why not 3D-print yourself a tonearm of your own design? If you're going for home-made, go all the way or go home. A Real Venture into Rocket Science. Many shapes from which to choose. Bearings and bearing materials. If you're a real nut, you could make a Linear Tracking type. The One DIY TT I've seen, many years ago, used a SAPHIRE bearing as the platters load bearer. Talk about slick. |
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Post by Boomzilla on Mar 20, 2017 9:55:56 GMT -5
Many of the current tables use a ceramic sphere as the load-bearing surface for the platter. One of the best drives I've heard of used not one but two drive belts of different elasticity to cancel out speed variations. I still think that direct-drive has better speed stability than any belt-drive system, but many disagree. Tone arm suspensions range from traditional needle bearings to "thread suspended" arms. One that I liked (despite its inherent instability) was a unipiviot. I liked it because there was virtually NO arm friction to overcome as the arm tracked from the periphery of the record toward the center.
There are now plenty of DIY tonearms available online for 3D printers, so you don't completely have to reinvent the arm (unless you just want to). But if I were going to the trouble of making a DIY turntable, I'd also want a DIY arm. But that's just me...
The last DIY table I made used an extra-long "transcription" tone arm for less tracking error. I built the base & painted it candy-apple red. Lots of fun with that table!
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Post by leonski on Mar 20, 2017 14:18:45 GMT -5
Ceramic is an interesting category of materials. Dental crowns are now fabricated out of several different types. Like a Zirconia (Zirconium?) compound which is harder than the tooth it is
replacing. Dentists can own or lease a machine which CARVES the crown net-shape from a 'blank'. Several steps later (like heat-treatment) and you're good to Chew Again. The camera
system and computer alone are worth just watching. The Dentist takes a 3d photo of both the upper and lower and 'fits' the crown electronically.
I don't know enough about 3-d printing yet. I'm certain, however, that you're 100% right. You'd just have to do a LOT of research or be willing to construct several 'test' arms.
What do you think of my Corian Suggestion?
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Post by flamethrower1 on Mar 21, 2017 9:05:40 GMT -5
I just got the DXF files for CNCing the plinth. This is kind of what I am trying to do.  I have heard this deck and it is a very nice deck built quite simply though not inexpensive. As far as building my own arm, maybe someday, not quite ready for that yet. The Audiomods arms are quite nice and will do for now. I had to send mine back because the headshell was broken off in shipping, that REALLY sucked. Will post more pics soon |
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Post by flamethrower1 on Apr 28, 2017 20:21:55 GMT -5
Ok, a little progress, still have to design the tonearm mounting and the motor housing. At least I am down to what I can do in my shop anyway without CNC machines. The three pieces of the plinth ended up going to two different shops because of the different materials. I was a little worried about tolerances, but everything is spot on. Anyway, one baby step at a time.  |
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Post by flamethrower1 on Apr 28, 2017 21:41:19 GMT -5
Not sure Granite or Concrete is best for turntables. Years ago I bought one of those solid granite isolation tables made by Starrett that is normally used for anti vibration sensitive microscopes. The sound was awful. Never tried granite anywhere near audio again I do run my deck on a granite slab (that I had cut at a local counter top supplier) mounted off from my own custom wall mount support. Best sounding, least problematic combination I have heard to date. And is in a REALLY not optimal position, directly above and within inches of the top of one of my speakers. |
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Post by flamethrower1 on Jun 1, 2017 6:48:11 GMT -5
Almost done, waiting for some parts from the machine shop for the stand alone motor assembly. I did run it from the motor borrowed from my other deck and even with the Ortofon Blue (test cartridge) it sounds very nice, well worth the effort. Cant wait to see what the ZXY 4D Ultimate does to improve the detail. Attachment Deleted |
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Post by vneal on Jun 1, 2017 7:52:54 GMT -5
You really should consider offering these for sale
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Post by 405x5 on Jun 1, 2017 9:32:16 GMT -5
My success with granite was excellent I made (2) from these templates, both for single play and multiple disc playback. Bill   |
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Post by flamethrower1 on Jul 9, 2017 10:27:10 GMT -5
Here is another little hot rod I threw together. The plinth is made with layers of Baltic birch and Particle board. Mass loaded with lead shot to a weight of 46 pounds. The veneer is Hickory that was cleared with laquer. Bearing is from 33rpmenginerring in the UK. VTA adjustment from Pete Riggle and an Origin Live Silver tonearm. The speed is controlled with a DIY controller from the DIY forum. Makes for a very nice sounding deck. |
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Post by Priapulus on Jul 9, 2017 17:52:05 GMT -5
What is material between the Granite and the floor? I was going to get a granite slab like yours, as a table top under my turntable. I was going to slice in half, a couple of soft rubber balls (i.e. 4 halves), to serve as resting points under the granite. Sincerely /b |
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