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Post by ChrisB on Oct 19, 2014 10:26:29 GMT
Granite vs Slate? Slate is certainly easier to work with if you DIY. Just be very aware that slate dust is toxic. Be very careful how you work with slate.Yep - silicosis is a risk and that needs to be mitgated.
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Post by MikeMusic on Oct 19, 2014 10:28:42 GMT
I shall mitigate 100% then and stick with granite !
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Post by ChrisB on Oct 19, 2014 10:39:13 GMT
I suspect granite also contains silicates!
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Post by Paul Barker on Oct 19, 2014 16:44:59 GMT
Is it Granite that is slate which has been exposed to volcano? Can't quite recall.
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Post by ChrisB on Oct 19, 2014 17:47:41 GMT
Both....kind of! Slate is sedimentary, granite is either igneous or metamorphic depending on who you believe. Granite has been melted, but not always by a volcano and slate is often made of sediment that originated as volcanic ash. (I did geology for a bit a school a long time ago and my memory is crap, so I'm probably completely wrong)
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Post by Paul Barker on Oct 19, 2014 18:42:06 GMT
I have a Geology A level from 1975, of which palientology played a minor role, but remember precious little about it.
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Post by Greg on Oct 19, 2014 22:00:56 GMT
Granite vs Slate? I would also argue that slate (at the scale it is used in this application) is not layered at all. Absolute rubbish! If Slate isn't finely layered, how on earth do you think it can be split to make very thin roof tiles? So in this application, assuming a plinth is 30 to 50mm thick, it will be a multi layered item which in terms will be a natural CLD application. Do you need me to explain how Slate was formed thousands of years ago? Happy to oblige if you do. In contrast, Granite is a crystalline construction. It does not possess the CLD benefits that Slate brings. Furthermore, in the early days of slate deck application, Darren who originated this approach trialed Granite vs. Slate and found sound wise, Slate was considerably better. That is why I have a Slatedeck for my Garrard 401. I would advocate using original Welsh Blue Slate which is the hardest known in the world, but now difficult to source. Otherwise, Cumbrian Slate is a good alternative. Don't go for foreign stuff especially the readily available Italian stuff which is so soft you can scratch it with your arse! Greg
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Post by ChrisB on Oct 19, 2014 22:13:43 GMT
No Greg, I don't need you to explain how it was laid down. I understood that there are usually two planes of weakness in slate and they are often perpendicular to each other. Roof tile makers take advantage of one of those planes.
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Post by ChrisB on Nov 3, 2014 1:06:25 GMT
Messages from the coal-face indicate that the plinth is fairly close to completion, so I'm getting one or two things ready so that I can get the thing up and playing records ASAP after it's arrival. I'll be needing to do a little rewiring - the mains cabling needs a little modification, so I have a suitable piece of Belden 19364 here ready to go. It will need to be attached to an IEC socket which will be going on the rear of the plinth. I've made up a suitable cable of the same stuff to go from the deck to the wall socket. Arms - I specified the plinth to accommodate a single arm, but there will be a couple of arm boards. One will take my new Zeta, which will carry a Koetsu Black and the other will be cut for the Ultracraft. I took a couple of photos of my arms tonight. The black/gold Zeta is now back on the Gyrodec - that has another Koetsu Black mounted in it. The all-black Zeta is going to be the one that will go on the G99. I need to sort some feet, but that will be the subject of some experimentation. It's interesting that Martin's recent experiments with TT isolation broadly follow my own discoveries on the subject.
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Post by MartinT on Nov 3, 2014 7:03:39 GMT
I'm looking forward to your findings, Chris. Can you tell us a little more about how the deck will be mounted/isolated?
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Post by ChrisB on Nov 3, 2014 7:29:11 GMT
I'm going to do some more playing around with it, and it may be different with this new plinth but with the other one, like you I found it was clear that sitting on a light board with soft feet was not the way to go. I'm thinking that a sheet of slate on soft feet will be best underneath the deck. I want to try hard feet again though. I also need to find a way to accomodate the ability to level it -I like the idea of the ease of levelling a sub-table rather than doing it to a heavy turntable The actual deck will have hard pointy feet but I need to experiment as to what they shall be made of. I have brass, steel, aluminium and some very hard wood to try first.
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Post by ChrisB on Nov 8, 2014 21:45:40 GMT
It's been a busy afternoon and evening! I collected the new plinth and the Zeta is mounted. It's not perfectly set up, by any means but the first record is playing now and it sounds rather good. Looks rather fantastic too! It's bloody massive - here it is, dripping off the edges of a Sound Organisation rack.
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Post by jammy on Nov 8, 2014 22:28:51 GMT
That is a bloody Monster Chris, and uglier than a Pug suppin Custard....!!!
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Post by ChrisB on Nov 8, 2014 22:57:32 GMT
Glad you like it!
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Post by MartinT on Nov 9, 2014 0:05:47 GMT
My word, that's a big plinth! The Zeta looks good with the Goldring.
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Post by ChrisB on Nov 9, 2014 0:14:23 GMT
Most people who've tried it agree that mass is an important factor in getting the Lenco mechanism to sing. So I got me some mass!
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Post by ChrisB on Nov 9, 2014 0:19:12 GMT
The counterweight is right at the far end of the beam because one of the internal wights is missing, but it just about balances out at 2 grammes like that. Still some bits and bobs to attend to but she's playing a fine tune now!
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Post by John on Nov 9, 2014 7:04:04 GMT
Great that you got the plinth Its a monster plinth but I heard a few set up this way and is worth the effort. A lot of work must of gone into that plinth. Be great if we could see some photos of the build.
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Post by ChrisB on Nov 9, 2014 10:17:30 GMT
I'm hoping that Carl will be along soon with some photos as he kept a record of his progress.
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Post by John on Nov 9, 2014 10:31:16 GMT
When totally set up be nice to have a comparison between the Orbe and Lenco
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