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Thread: Rebuilding and modifying my Lentek head amp

  1. #31
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 102,067
    I'm AudioAl'sArbiterForPISHANTO.

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    Quote Originally Posted by Frinpaul View Post
    Hi Marco,

    Thanks for such a prompt and detailed reply - much appreciated!

    I take your point about the original output cables being a potential bottleneck; I have thought that might well be the case, especially as one of the phono connectors on mine is slightly temperamental. Is it relatively straightforward to change the cables and, if so, could you recommend cables that would be an improvement? I'm afraid any internal work on the Lentek would likely be beyond me - actually, it was the fact that you mentioned that you had outsourced the work that initially piqued my interest.

    I agree that Duracells seem to be about the best match battery-wise. I was, though, very impressed with some Philips alkalines that I tried a few years ago - they were being sold in Poundland, and were the only batteries I've tried that I felt were (at least) a sonic match for the Duracells in the Lentek.

    All the best
    No worries, Paul, you're welcome. The rather 'flaky' nature of the stock connectors on the Lentek is well-known, but there wasn't much better around in the 80s! In terms of connectors, I'd use these copper ones from CMC, as they're very good quality and well priced:

    https://www.hificollective.co.uk/pho...a-sockets.html and in terms of cable, I used this Cardas Litz stuff, which is excellent. Keep the lengths as short as possible (just enough to reach the partnering kit, but with a bit of flexibility): https://www.hificollective.co.uk/wir...nect-wire.html

    And as for phono plugs, the sky's your limit. I used these: https://www.hificollective.co.uk/pho...mony-plug.html but you could just as easily use the slightly less expensive copper versions, in order to maintain a solid-copper contact connection with the CMC sockets: https://www.hificollective.co.uk/pho...mony-plug.html

    For me, you can easily hear the sonic improvements of solid-copper or silver plugs and connectors, over their brass counterparts. I also like the low-mass nature of the shells on the KLE Harmony plugs, as to reduce eddy currents, you want the least amount of metal on plugs as possible, and so contrary to what your instincts may tell you, in terms of getting 'value for money', the heavier and more solid the better is NOT the case...

    You want light but rigid, low-mass, non-magnetic shells on phono plugs, where for best sound, the only metal used is in the conductors themselves!

    In terms of upgrading the 'internals', should you wish to go there, I'm sure that Anthony would be more than willing to do the work for you, as he did for me, so just pop him a PM (anthonyTD) and it would simply be a case of sending the unit to him and agreeing the cost, in order to do what's necessary. Hope that helps

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310.

    Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW18.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.


    Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!

  2. #32
    Join Date: Sep 2020

    Location: Essex

    Posts: 8
    I'm Paul.

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    Hi Marco,

    Thanks for the info and suggestions, much appreciated. I certainly think my little Lentek deserves some new cables and sockets!

    Paul

  3. #33
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 102,067
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Definitely, Paul. If you fit the items I've recommended, or similar, I'm sure you'll be very pleased with the results! Let us know how you get on

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310.

    Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW18.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.


    Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!

  4. #34
    Join Date: Sep 2020

    Location: Essex

    Posts: 8
    I'm Paul.

    Default

    Hi Marco,

    I was very interested to hear that low mass connectors are the way to go - I would have followed intuition and gone down the heavy/chunky route, so thanks for the heads-up on that. I must admit to a lot of prior scepticism when it comes to the sonic effect of cables and plugs, until I happened to change the turntable mains cable for something better (but not esoteric) that I had sitting around, and being very surprised at the improvement. More recently I have played around with speaker cables (having stuck with NAC A4 for 30+years!) and been very surprised by the sonically diverse results - so, I am now convinced that the smaller links in the chain do play a significant part in the overall result.

    Kind Regards

    Paul

  5. #35
    Join Date: Sep 2009

    Location: Derbyshire

    Posts: 8,753
    I'm Josie.

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    How is this working out, Marco?
    TRIO L-07D Turntable - Tube Distinctions Copper Amp (Using KT150's) - Croft Epoch Elite (Very highly upgraded) - Studer A80R Master Recorder (High Speed 15/30 IPS) - 15" Tannoy Monitor Gold - Loudspeakers in Lockwood Major cabinets - Tannoyista SPEC 3 Custom Crossovers - VanDamme Black Speaker Cable - Allo Revolution + USBridge + SHANTI PSU



    Tannoyista.com

  6. #36
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 102,067
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Tremendous, it's a different beast - and best I've ever heard a Lentek! More on that later

    It's currently at Anthony's just getting some caps replaced we missed the last time, along with my headphone amp, being modified, which we discussed. So as soon as Anthony's done that and they're ready, we can sort out your Copper amp

    ATB,
    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310.

    Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW18.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.


    Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!

  7. #37
    Join Date: Sep 2009

    Location: Derbyshire

    Posts: 8,753
    I'm Josie.

    Default

    Cool.. I'd be really interested in having the same done to mine too.
    TRIO L-07D Turntable - Tube Distinctions Copper Amp (Using KT150's) - Croft Epoch Elite (Very highly upgraded) - Studer A80R Master Recorder (High Speed 15/30 IPS) - 15" Tannoy Monitor Gold - Loudspeakers in Lockwood Major cabinets - Tannoyista SPEC 3 Custom Crossovers - VanDamme Black Speaker Cable - Allo Revolution + USBridge + SHANTI PSU



    Tannoyista.com

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