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Thread: LENCO - GL75 Project

  1. #1021
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 2,297
    I'm jamie.

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    did you do the bias line that long for a reason?
    My System/ Yamaha NS1000M speakers,Pioneer PLC-1700, direct drive turntable, Townsend Elite rock 2 turntable,,Alphason HR-100S-MCS tonearm,Ortofon 2M BLACK cartridge ,Sony 700ES Amp,Sony X555ES CD Player, Nakamichi ca5 pre amp ,

  2. #1022
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,609
    I'm AnDreW.

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    Quote Originally Posted by jamie123 View Post
    did you do the bias line that long for a reason?
    No I over estimated it's length, it dosent have any impact on the sonics.
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analouge Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MCOrtofon Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing401 PlinthMoldovan Arm SME 3012(Ikeda Ag wired) PSUPheonix PSU+Tachomter MCAg Meister SPU/DECCA Maroon CABLESArm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage4Box Paradise


  3. #1023
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,609
    I'm AnDreW.

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    Tonights Update - The Reference Lenco pt LXV - Dr. Livinsgstone I presume, or further adventures into Lenco modding.

    So, my Jersey break did me the world of good and I had time to really go over the deck with a fine tooth comb. So some of the areas I "may" experiment with are :-

    1. Re-wiring the motor to 110v and using a step up transformer to see if this improves sonics. The idea is to produce less vibration and thus less entering into the top-plate, bearing, platter and ultimately the cartridge.

    2. Better designed baring brace. This is to try and improve on the coupling of the bearing and the top plate. Again another gambit to combat vibration.

    3. A better plinth design with decoupling of the tonearm and motor. yet again another method of limiting vibration. I should also be able to add more mass into the plinth. I intend to design a tighter fitting plinth and also increase the contact area bewteen the top plate and the plinth.

    4. Newly designed top plate. I should be able to fill in more of the top plate due to some new work I'm doing on the idler arm.

    5. Newly optimised idler arm mount. I'm planning a re-design of the idler arm mount. Should be good fun when I get around to it.

    6. Better cable sheilding. Probably dosent add anything to the decks performance but you never ever can tell!

    7. Experiments into decoupling the motor and reducing db's noise. Another trawl of Lenco Heaven has fetched up some interesting ideas and the technology to measure db levels in the plinth, platter and bearing is now more easily available so we could be messing around with these for some time.


    Still lots to be done and this thread will probably extend into 2018. All these mods will go into Version 3 of my Reference Lenco. These mods are listed in no particular order and will probably be done on a whim depening upon what I feel like doing and finances! I'm in the middle of a Goldring 99 restoration so the poor old '75 has had take a back burner for a we while whilst I finish it off. I also need to spend some time on my Garrard 301, it's not had any serious work done for quite some time and the lessons learned from the 75 will be put to good use but thats another deck and another thread!
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analouge Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MCOrtofon Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing401 PlinthMoldovan Arm SME 3012(Ikeda Ag wired) PSUPheonix PSU+Tachomter MCAg Meister SPU/DECCA Maroon CABLESArm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage4Box Paradise


  4. #1024
    Join Date: May 2011

    Location: Glasgow

    Posts: 6,158
    I'm Brian.

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    All good stuff again Andy . When I did some work on the GL75 I mistakenly let the motor touch the plinth briefly and was very surprised at the how much the motor vibrated . If I was going down the same road reducing the motor vibration would be my first priority . I've read about reducing the voltage to 110V and it looks very interesting . I will be watching this experiment with interest .
    Unfortunately I don't have the work area , the time , or the skill , to carry out the work which you're planning to do mate . I did replace the phono leads with VDH shielded cable , and the mains cable and it made a difference IMO .
    That's you got three turntables in the workshop now Andy , enjoy yersel
    Regards
    Brian

    Sell your cleverness and buy bewilderment . (Rumi )


    Korus Computer Audio music server .
    DAC 3 French DAC
    Amplifier : Rega Brio R
    Speakers : Tannoy 637
    Interconnects : MS Audio / Klotz MC5000 .
    Speaker cables : Chord Epic Twin

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