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Old 2nd July 2011, 08:23 PM   #21
brianco is offline brianco  Ireland
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Location: Scottish Borders - Kelso; on the famous Tweed River!
I am making a slate plinth with two layers of alloy sandwiched very much like Mikiel's (check spelling) as shown in AA.

Vinyl Asylum: Technics SP-10 Mk3, new plinth, Reed arm, first impressions. by mikel

I will be using a heavyweight unipivot [DIY] and a Kondo Io. The motor will be mounted Kenata style [without top-plate]. The power supply has been mounted in a seperate chassis as an outboard unit. HAving had a few months of sickness I am now ready to go. Will post pics when finished.
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Old 3rd July 2011, 01:10 AM   #22
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Ditto my previous post about watching and stealing ideas. I like the look of that one too, and I had always intended to have the electronics external (have case stored already for them) and prefer the appearance sans the original SP10 chassis, so construction pics and details would be nice when you do it please.
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Old 3rd July 2011, 08:12 AM   #23
Calvin is offline Calvin  Germany
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Hi,

while I´m not using a SP10 I had the chance to get a SL5210 at ebay.
I planned to use the motor and electronics and maybe even the arm, but to omit with the cabinet and fancy nicknack like Repeat, Automatic, Quartz-drive Off and so on. Just On/Off and 33/45 remains. Tonearm will be a Rega RB300 which adds to the straight pure looks.

Designwise I reallly like the Bauer DPS. Its a rather slim outlined deck with no fancy. I also liked the sandwich structure of the DPS plinth, combining several materials.
From bottom to top:
1) a thin green coloured foam layer
2) a thick granite slab (on which the motor casing rests). Its an aluminum plate in the new models to which the motor block is now screwed onto.
3) 3 feet of a foamy structured material
4) a sandwich of 3 layers of plywood and 2 layers of a filled heavy rubber material topped by a thin layer of cork
5) a thick acrylic top plate that holds the bearing and the Tonearm
All 5 components are just put together on top of each other, fixed only by their own weight.
Even though this sandwich builds quite high, the optical impression is slim and elegant. I doesn´t look as thick, massive, fat and disproportioned (to my eyes) as the plinths shown here, even though some of them are beautifully finished.

I´ll choose a similar but simpler approach.
It starts with a plywood base. Aluminim strips will later be connected to this base plate for optical reasons and as mount for the connectors.
Click the image to open in full size.
Click the image to open in full size.

Followed by a thin layer of rubber foam
Click the image to open in full size.
Click the image to open in full size.

A layer of plywood with openings for the electronics (right) motor (mid ) and tonearm (left). The motor will be bolted to this layer.
Click the image to open in full size.
Click the image to open in full size.

A layer of MDF is glued ontop of the playwood, forming a sandwich
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

As visible top-layer serves a plate made from slate, either just fixed by weight or by double sided stick tape. The tonearm will be mounted onto the slate plate.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Rem: You may just notice the two tiny holes at the left front corner/edge. Two capacitive touch sensors are mounted below the surface of the slate functioning as switches for On/Off and 33/45. Optical fibres anding at dual colour-LEDs mark the positions of the sensor fields.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

And with new lid which is a part from Numark
Click the image to open in full size.
Click the image to open in full size.
Rem: besides beeing one of the cheapest replacement lids around, I like its form and the fact that You can play the deck and handle the sensor fields with the lid on.

Its not finsished yet. The aluminium needs to be brushed anodyzed in black and the electronics will undergo some tweaking. But the pics may just give You an impression of the conceptual ideas behind and the looks.

jauu
Calvin

Last edited by Calvin; 3rd July 2011 at 08:35 AM.
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Old 16th July 2011, 08:01 PM   #24
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It's going to be a while before I get rolling on this project.
Personally, I find myself wanting to relax when I get home from work. Weekends find me working on other "to-do" lists. Stuff that needs to get done.

So those are my excuses for not diving right into this SP-10 mkII project.

However I have been planning.

Here are a couple of sketch renders. This one is to be considered a "light" plinth by today's standards. As time goes by, I will make more massive ones, but I thought it only proper to try, potentially, three different weights of plinths. Light, medium and heavy.

So here is the proposed "Light" plinth.
Click the image to open in full size.

without armboard:
Click the image to open in full size.

I'll need to make a trip to my local plywood store for some more baltic birch plywood to complete this design. Current inventory allows for 3 of the 6 layers needed.

Finish will be multi-coat lacquer. Black.
Armboard will be in solid Purpleheart with no finish coating.

The design will allow for 9 inch up to 12 inch tonearm mounting.
My first arm will be the black Zeta that I mentioned previously.

Probably, before the end of July, I'll have more info to add to this thread.

later,
-Steve

Last edited by user510; 16th July 2011 at 08:04 PM.
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Old 16th July 2011, 10:07 PM   #25
kevinkr is offline kevinkr  United States
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Old 2nd August 2011, 08:11 PM   #26
johnm is offline johnm  United Kingdom
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Ditto
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Old 21st August 2011, 11:21 PM   #27
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Updates:
It's August and I still haven't done anything in the garage for this project.
But I have been busy making plans for plinth design.
Here are some more fully thought out details for what is to come.

Click the image to open in full size.
This view suggests different weights of builds. Call it light, medium, heavy. It is the same plinth design but with more or less layers of baltic birch plywood between the top and bottom layers. The light version measures 3 inches from top plate to bottom plate. Medium is 4 inches. Heavy is 5 inches.

Here's a view showing more detail of the build:
Click the image to open in full size.

Nothing difficult to build. Tonearm wires and power plugs exit through the bottom plate without having to disassemble anything.
I have a tendency to mess around with turntables after a while, so I want to make it easy to mount, dismount both tonearms and the chassis.

For those interested in making their own version of this design here is a dimensioned layout of the top view in pdf format.

http://www.theanalogdept.com/images/...out%20dims.pdf

The above drawing is meant to be printed to 11 x 17. If you can't print that big, use the snapshot tool in Adobe Reader to split the drawing into two separate 8-1/2 x 11 inch prints. This should enable you to read it clearly.

-Steve
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Old 22nd August 2011, 06:46 AM   #28
Calvin is offline Calvin  Germany
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Hi,

the ´light´one certainly looks sexy, the "athlet".
The ´medium´ one looks ok, the "chartered accountant who does some fitness".
The ´heavy´ one looks ...well.... fat, the "couch potatoe".

jauu
Calvin
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Old 23rd August 2011, 08:56 AM   #29
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My previous SP10 plinth was heavy, very heavy. Mass, they like lots of well damped mass. Hollow out all of the spare hollow sections and fill it with lead shot and very fine pure sand. And if you watertight the wood with lots of epoxy, some oil too.
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Old 23rd August 2011, 10:16 AM   #30
brianco is offline brianco  Ireland
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I have had both versions of the factory plinth; the full lava rock one was a big improvement on the rosewood+lava domestic version. Too busy at the moment to complete my motor only version in slate and alloy. However hope to be on the job again as soon as the visitor list has completed and the salmon fishing has quietened down.

The plinths above were significant improvements on any heavy wooden version I have heard, though I have not heard the heavy fruitwood and "drained" types. So I endorse the favoured high mass solutions.
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