We don’t enjoy only music: even pizza…
We don’t enjoy only music: even pizza…
LH-2 is the name of the spindle extension and corian platter. It came out really nice looking but especially it sound great in our Lenco’s.It is available to pubblic. Just go to the component page for details.
Corian platter height is 12mm. This is just the minimun high that can make the all thing work. It is just 0,5mm. higher than the original Lenco spindle extension. This allow the original spindle to be housed in the new spindle extension.
On the right you see the natural rubber mat that match the original Lenco platter to the new corian platter. The rubber act as vibration absorber and an integral original -corian platter matching.
This is how it looks once mounted in some original L75:
and now complete in another one:
New spindle extension batch just arrived!! They are stainless cnc professional made. They can be mounted in an additional platter 12mm. minimun high. The spindle is fixed to the platter with just four screws. After it is assembled in the 12mm. platter the spindle usefull high is 25mm.
There is a lot of space to mount every mat you want. Now I’m waiting for the corian platter to come.
A new Lencohell L75 is here. This is all corian plinth and stainless chassis. Those material together bring the L75 to really new class. The result is really fulfilling. The stage image is firmly just behind the speaker very solid,and deep, relaxed with lots of micro and macrodinamics, timing is great. Resolution, as a very good belt turntable, powerful presence as the best transcription table.
The plinth is made of 5 panels of 12mm. black corian. Above them the 4mm. stainless turntable chassis and another corian panel is the top. The added mass and stainless stiffness bring down vibration and noise from the Lenco. It is about 25kg. turntable.
To add more isolation to the transmission wheel we added a natural rubber mat coupled with a 12mm. corian mat . This was achieved with the custom production of a stainless spindle extension. This bring to us the possibilty to add at the original Lenco platter whatever you want.
Above the plinth there is our own design Lenco chassis. The design is like the original but on a 4mm. stainless panel. The motor is installed on a separate island. The aim is to improve rigidity and isolation.
During various listening session we had evidence of the mat’s importance with the turntable. We didn’t liked the original Lenco rubber mat, it has a kind of dampening effect.
We tried different different mat : lead, leather , cork, latex, shellac. But the spindle height is a strong limitation for different material and thickness.
In particular in our previous turntables we really loved the 10 and 25mm. thick graphite mat. But the Lenco’s spindle prevent us to use them. There are available spindle extension but they work only with a second Lenco’s platter. We didn’t like that solution so we looked for a different one.
We took a 12mm. corian or alluminium platter cnc machined with our own stainless spindle extension.
The work was pretty difficult due to the low tollerances needed but when you put the spindle in the extension and than you take it out is clearly audible a pop like you uncork a bootle of wine!!
well we really didn’t expect what we heard. It was a different record player, speed attach, lifelike, resolution all improved in a such a way we diyer didn’t expect in once. Just corian platter over the Lenco platter made such a big difference… we think the reason reside in the better motor-wheel-cartridge isolation.
Then we went crazy blending different material combination. I ended up with cork, alluminium platter , 10mm.graphite. My fellow is happy with latex and corian platter.
Lenco seemed didn’t care about the weight increase, the speed remained perfect as before .
In view of others upgrades we reinforced the original bearing and a new single pek piece as thrust plate.
One day I went to a flea market and noticed a pretty bad condiction turntable but was different from usual consumer turntable. It was all metal with a heavy platter.
Ok ok it was really bad, actually they were, infact they were two. Probably they were a dj console. A fast web research showed a surprisingly high interest in this model, L75/S. Many people appreciate the speed stability of the player. This was of particular interest for me because, after my marriage ceased, my ex wife was permanently complianing about the ex my belt turntable stability. It was a very good player but it needed frequent speed check and small adjustments. For some people this is just too much.
As a hard core diy audio fan I surfed the web to learn more about the Lencos and how to get the best from them. Here I have to mention Lencoheaven site as a formidable informations source. There you can find many valuable advise about the old Lencos turntables, especially B55, L70, L75 and 78.
First thing to do with a turntable that probably has more the 40 years is clean and lubrification servicing. What a joy to disassemble this swiss player. Everything were screwed, almost. No plastics all metal parts.
At Lencoheaven you will find all the guide you need for maintenance.
But the chassis !! I have to repaint it or… make a new one!! Someone has already done something like it. He has made different interpretation of chassis plus two substantial innovations. He used a thicker stainless base and motor / bearing decoupling.
Very appealing. But I liked so much the original layout that I wanted to try to remake it plus the innovations already mentioned. The challenge was to use as much Lenco’s components as possible including on/off switch, speed regulation and brake mechanism. The arm lifter was excluded by purpose. Speed regulation limited to 33 and 45 but with minor change it can cover 16 and 78 too,
The target was easy to say but to make it on paper with the right accuracy has been hours consuming. I collected all the informations available and after one test the second shot has played records since.
Here it was the prototype without plinth but with a temporary cover to ceck switch funcionality.
Now let’s have a look what’s underside:
The idler wheel in working position and here in stop position
Now it’s time for the full dress, corian was chosen.
My collague , yes we are two, didn’t want arm hole because he is using it with a Sme 3012.
So why not do a Lenco L75 12inch version! plus some more ideas.
This time ipe´ wood was choose as plinth. That wood make a really heavy plinth.
Now some stainless details Brake and arm switch
Underneath view with speed control lever Idler wheel and arm
Now the motor island
The idler wheel in the rest position
The cover is 12mm. thick alluminium
Finally the turntable mounted.
Please note the lower armboard in order to accept my tall tonearm.
This has been a really demanding project, the difficulties were not only to design the main boards but few stainless details that we had custom made from a lathe laboratory. That said once those parts are available all the rest is pretty easy job. The tool needed are screwdriver and wrench and few M3 and M4 screw. It is possible to go back anytime to the original Lenco frame. We compared it with standard L75 or heavy plinth L75 mount and we can say that Lencohell player paid off all the time we spent on it. We consider it a remarkable upgrade from ordinary Lenco project.
Today we tried a new approach to the idler wheel arm and speed slider approach. It is undoubtetly true the more the arm is mechanically isolated from the main board the better. Lenco did this in a couple of way: throw an elastic washer,
or direct coupling with nothing betwen. Those works pretty well indded. Now came that I have a teflon sheet in hand, it is 4mm. thick so I have done few holes in it and I have reduced the center down to 1,5-2mm. This is how it looked before :
and this is the new approach:
We think this approach its worthwhile, doesn’t make night and day difference but you know, the stair goes to the top with many little step.