LENCO - GL75 Project

Tonights Update - The Reference Lenco Pt XXXVIII - Still learning more about the deck!

The Lenco is now fully populated, wired up and platter turning (at 39.9 rpm :doh:) and the motor is extremely noisy. This dosen't matter to me as I still have lots to do. So I thought I'd post a few pics.

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An underside shot of the old and new top plates. The right is the new modded version with marine resin and every hole filled. The left top plate looks like a swiss cheese.

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A fully populated top plate and this time you can see the extent of the filling under the platter.

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Further isolation and resonance control for the idler brake and idler arm.


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The speed selector and all the screws holding it are now gone.

See more mods in pt 2 of tonight update.

The Reference Lenco Pt XXXVIII - Part deux.

A quick shot of the new speed selector.


Attachment 19391

A shot of the new tonearm mounting kit I put together. Previously the tonearm mount was held onto the the top plate with x3 very small M5 nuts, seen on the right of the picture. The new kit comprises of x3 longer length M5 bolts which need modding and then x3 large washers and x3 nuts. The idea is to improve the contact between the tonearm mounting pod and the top plate whilst spreading any resonance through the bolts and washers on the underside of the plinth onto the marine resin. I've picked large washer to try and increase surface area.

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Final shot of the night. Here's the '75 in it's current guise.

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So what next? Well believe me or not I think I've come up with a way to completely get rid of all the speed selector linkages. I need to check the garage for spare parts. The deck needs fine tuning and the motor springs need properly setting up. Looking good so far. I have a fun feeling I'm going to get my arse bitten when it comes to fitting the tonearm cable. :(

As always... Stay tuned.................:wave:

Been hard at work then Andy :D

I've got to pop out to visit mother in law in hospital , however , I look forward to part 2 when I return .

Begone evil speed selector and all your linkages. New mod seems to work. More tomorrow. :D

Tonights update - The Reference Lenco Pt XXXIX - Sanity nearly restored.

Putting the Lenco back together again has been a great experience so far. Like all experiments it can be a little frustrating when things don't quite go to plan but I think that's what makes this hobby so fun in that you end up learning from your mistakes and then you get more confident on the next project. I decided that I wanted to make a new tonearm mount and indeed I have but I managed to fcuk things up a little in that the drill holes are not as accurate as what they could be and the mounting threads are too short :doh:. This isn't a problem as my Karma tonight has been kept in check in that knowledge that the platter spins at 33.3 rpm solid and that's with the stacked platter configuration :hairmetal:. My second dosage of Karma tonight was realised when I managed to completely dump all the engineering for the speed selector. A total of 12 components (I think) which can no longer transmit resonance from the top plate and then into the idler wheel and then the platter (you get the idea).


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So the deck now looks like Mr. Skinny on it's underside.

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All this optimisation leaves me with a rather big problem in that I now have a few bloody big holes on the top plate which are now going to need filling (AGAIN :steam:). I'm still cool with this extra work as it's no big deal really and will just add another day or two onto the completion time, big deal.

Attachment 19407

So this is how the deck looks as of tonight.

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There are still quite a few jobs to do before I've finished. I've learned that motor fine tuning is best left until last. Funnily enough the motor is a little quieter than last night. This is probably from all the jiggling around from when I was trying to fine tune the platter speed. I'll probably do the tonearm mount work first and then get the final holes filled in the top plate, then another respray. I'm beginning to see light at the end of the tunnel (again). OK, as ever, stay tuned....:wave:

Good grief , there isn't a lot left of the original GL75 is there Andy , and to be honest I rather like it . It's still my intention to grab an old knackered top plate and go down the route you have gone down . However , you seem to have taken things much further than expected and I will be watching this thread with interest . Looking very nice indeed . Well done mate :)

I've got a GL68 top plate Brian. If you fancy doing a 90 degree job.

Thanks Geoff but I'm busy changing other parts of my system at the moment , costing a bit at the moment .

Quote:

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Originally Posted by walpurgis

I've got a GL68 top plate Brian. If you fancy doing a 90 degree job.

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Jean Nantis?

Quote:

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Originally Posted by brian2957

Thanks Geoff but I'm busy changing other parts of my system at the moment , costing a bit at the moment .

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Thanks for the comments. I could go further and remove the linkages for the on/off switch. This would then mean using a bit of fishing line and 40g to control the idler wheel on the motor spindle, just like Jean Nantis. I haven't forgotten the sorbothane!!!!! I'm looking into some more isolation around the motor springs and possibly on the mounting threads, I'll give it some more thought when I'm less tired!

This is getting a bit technical now matey :D

No hurry for the sorbothane Andy , I will have to have a good look at it before I decided on uses .