Lenco demonstrator

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Mike H
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#61 Re: Lenco demonstrator

Post by Mike H »

:thumbright:
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
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cressy
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#62 Re: Lenco demonstrator

Post by cressy »

Bollocks.
Got the trim ring and the arm board painted aluminium silver, put it down on the side in the kitchen to cure, and there must have been some water there which it has soaked up at the thinnest part where the section is cut out for the speed change lever comes out

It has swelled here.
Ive sanded it back on the underside so it sits flat again, but the top is bowed upward slightly and so is the chamfer.

So it now looks abit odd, right where you can see it......
To make a new one and paint it will set me back a good few days which i dont really want.

Shite
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pre65
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#63 Re: Lenco demonstrator

Post by pre65 »

When I work with MDF I give it a coat of sanding sealer once it's been machined.

Stops all that moisture related business.

This is what I use.

http://www.ebay.co.uk/itm/Rustins-Quick ... XQeW5TcO1r
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simon
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#64 Re: Lenco demonstrator

Post by simon »

I've used watered down pva to seal mdf which has worked fine. And it's the right price :-). No good if you want to varnish it though. But wouldn't varnish do the same job as the Rustins? Don't know, never tried it.
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#65 Re: Lenco demonstrator

Post by cressy »

It hasn't blown and separated, its just swelled so the paint finish is intact, it just has a hump in it. With a bit of luck it will drop abit.
Its visible if you look at it from certain angles.
I think i'll wait until the paint had cured and sand the top flat then recut the chamfer and repaint it
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#66 Re: Lenco demonstrator

Post by cressy »

This is what it looks like now photobucket is working again
Image
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Mike H
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#67 Re: Lenco demonstrator

Post by Mike H »

What's the spring thing?
 
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cressy
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#68 Re: Lenco demonstrator

Post by cressy »

It's a mounting spring for a dual 1019, i borrowed the steep cap off it to shove under the speed change lever to stop it catching the paint on the ring
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#69 Re: Lenco demonstrator

Post by cressy »

Turned a corner with this build this morning, got everything assembled and checked then lashed power up to it again.
Dropped the modified rega into the dry build and spun it up.
The bearing has a pom thrust pad a new ball, and it's advised to run it in. Its apparently abit noisy for a few hours until the ball wears through the tiny marks in its surface from machining.
This appears to be correct as its quietened right down over the last hour.
I havent added the earth for the top plate yet as I can't put the iec socket on until it's veneered so thats on the radically shortened to do list.
Image

I havent even screwed the arm down, its just sat in the cutout on the armboard which is a tight fit around the pillar so it lines up properly. No need to start drilling this way.

I'll just let it play so it runs itsself in until I get the veneer.
The cart is not buggered as a thought, I went to box it up to send it back to mantra and decided to recheck everything to be sure.
Turns out it was a faulty lead between the phono stage and the passive.
So i then rang mantra and let him know with a rather red face....
Schoolboy error......
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Mike H
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#70 Re: Lenco demonstrator

Post by Mike H »

:thumbleft:
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
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cressy
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#71 Re: Lenco demonstrator

Post by cressy »

I think I can recommend the POM thrust pad as a small upgrade for the lenco, its had about 6 hours on it and is now silent. Soundwise, i think it's a little bit cleaner, stage width a bit better.
Of course that could be bollocks, as I am listening to Boston far far too loud at the moment :D
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Mike H
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#72 Re: Lenco demonstrator

Post by Mike H »

Image


Sorry what is "POM" ?

Image
 
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#73 Re: Lenco demonstrator

Post by jack »

Mike H wrote:Sorry what is "POM" ?
Polyoxomethylene - a very stiff, low friction, polymer.

Commonly known as Delrin (other manufacturers use their own names) - used for small plastic gears etc. We use it in HV stuff for Tesla Coil insulators etc. Often sold as a mix with Teflon or reinforcing glass fibres - very good insulator and doesn't absorb water, unlike some other insulators, so for the Tesla people who basically make stuff in sheds mainly, it's good stuff!

Easy to machine as long as you don't let it get too hot as it's a thermoplastic so can melt - also expands when warm, so when turning it, the last cut must be very fine if you want accuracy.
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pre65
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#74 Re: Lenco demonstrator

Post by pre65 »

I use Delrin, in sheet form and in rod form.

It's one of many "engineering plastics" and it is (as Nick says) quite east to work with.

I made an oil seal protector out of black delrin rod recently when replacing my BMW gearbox output seal. The difference between ID and OD was very small but I managed it on my lathe. :)
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cressy
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#75 Re: Lenco demonstrator

Post by cressy »

Just been playing level 42's debut album, and thrashing the nuts off the amp.
Played it all the way through, there isn't a duff track on it. Brilliant stuff. Ive stuck a bid in on a copy for myself.
If the deck is lacking in some way this album comes out as abit of a mess. But it doesn't with this combo.
This lenco sounds sort of half way between simons with its ekos and mi dads with the mayware

It has got larger with each iteration, its about an inch or so wider than simons which was the same again bigger than the original.

Screwed the arm down properly now too.
Id love to hear them all together again.....
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