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Thread: Goldpoint SA4M-47 passive 'preamp' winging its way to Marco Towers...

  1. #611
    Join Date: Mar 2008

    Location: Galashiels

    Posts: 14,032
    I'm inthescottishmafia.

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    “Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”

    Hunter S Thompson

  2. #612
    Join Date: Oct 2008

    Location: Glasgowshire

    Posts: 10,639
    I'm Gary.

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    Hopefully Marco can bring his LDR over to mine for listen on Sunday.
    Guv'nor?

  3. #613
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,546
    I'm AudioAl'sArbiterForPISHANTO.

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    Only if you lick my cadmium-coated lollipop, big boy!

    Marco.

    P.S Will reply to your PM shortly.
    Main System

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

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and 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, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. 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 HW16.5 record cleaning machine.

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

  4. #614
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 98,920
    I'm Grant.

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    Quote Originally Posted by Gazjam View Post
    Hopefully Marco can bring his LDR over to mine for listen on Sunday.
    Guv'nor?
    It should lead him up the path of least resistance
    Regards,
    Grant .... ؠ ......Don't be such a big girl's blouse

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    FIIO K7 BT, M11 PLUS, BTR7, KA5 - OPPO BDP-103D - PANASONIC UB450 - PANASONIC 4K ULTRA HD TV - PIXEL 6 - AVANTREE LR BLUETOOTH - 2* X600 SOUNDCORE - HEADPHONES INCLUDE, FIIO, NURAPHONES', FOCAL, OPPO, BOSE, CAMBRIDGE, BOWER & WILKINS, DEVIALET, MARSHALL, SONY, MITCHELL & JOHNSTON - 2*ZBOOK'S- MERCURY BD ROM, ROON, QOBUZ, TIDAL, PLEX, CYBERLINK, JRIVER - MULTI HDD'S -

    Oh my god! There's nothing wrong with the bidet is there?

    “Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".

    “You see these dictators on their pedestals, surrounded by the bayonets of their soldiers and the truncheons of their police ... yet in their hearts there is unspoken fear. They are afraid of words and thoughts: words spoken abroad, thoughts stirring at home -- all the more powerful because forbidden -- terrify them. A little mouse of thought appears in the room, and even the mightiest potentates are thrown into panic.”

    "You don't have free will. You have the appearance of free will.”

    “There's a war out there, old friend. A world war. And it's not about who's got the most bullets. It's about who controls the information. What we see and hear, how we work, what we think... it's all about the information!”


    ***SMILE, BE HAPPY***

  5. #615
    Join Date: May 2012

    Location: Toulouse, France

    Posts: 7,192
    I'm Kevin.

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    You got the lower capacitance cables yet?
    Kevin

    Too busy enjoying the music....

    European loan coordinator for Graham Slee HiFi system components..

  6. #616
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,546
    I'm AudioAl'sArbiterForPISHANTO.

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    Yup! All sorts of things to be reported on, muchacho, but I'm up in Scotland at the moment, visiting friends, and soon will be over in France [unlikes others 'elsewhere', I have a life], so don't expect any major contributions here from me until around the beginning of November

    Marco.
    Main System

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

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and 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, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. 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 HW16.5 record cleaning machine.

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

  7. #617
    Join Date: Sep 2009

    Location: Derbyshire

    Posts: 9,351
    I'm Josie.

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    Quote Originally Posted by Firebottle View Post
    Hi Josie, I'll give it a shot at a laymans explanation.

    A basic attenuator is a series resistance and a shunt resistance. A standard potentiometer in effect combines both with the wiper terminal dictating the resistance split between series and shunt.
    As the series resistance decreases the shunt resistance increases, this ups the volume.

    An LDR is a Light Dependant Resistor. The resistance varies due to the amount of light energy inside the LDR. Cleverly the light element, normally a LED, is completely isolated electrically from the resistance part. This means that when the resistance is in an audio circuit there is absolutely no degradation of the signal passing through the resistance.

    To form an LDR passive two are used and arranged so that as one reduces in value the other increases in value, with a common control voltage.
    This is the same as a series/shunt attenuator, hence a passive control.

    Hope this is clear,

    Hi Alan... sorry about the delay. Many thanks for the explanation. It does make sense, a bit... lol but enough I think. Thanks for taking the time to do that.

    Jo
    Ultrafide U500DC power amplifier - Croft Vitale )highly modified) - TRIO L-07D Turntable - Denon DL103C1 - Funk Firm Houdini - Lentek MC head amp - 15" Tannoy Monitor Gold Loudspeakers in Lockwood Major cabinets (From Trident Studios) - Tannoyista SPEC 3 Custom Crossovers - VanDamme Black Speaker Cable

    Tannoyista.com
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  8. #618
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,546
    I'm AudioAl'sArbiterForPISHANTO.

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    Apologies, chaps, for the delay in bringing this thread to a proper conclusion, but I've been away on holiday abroad, and then had friends visiting when I returned [contrary to the lonely and unfulfilled existence of some sad inadequates 'elsewhere', I do have a life outside of participating on forums ], so not had much time recently for contributing.

    Anyway, full review of the NVA SSC/Belden/MC5000 interconnects, in conjunction with the Goldpoint, in due course, not to mention further conclusions on the LDR, and also how the Croft shaped up to the 'passive whippersnappers' when plumbed back into the system, once I've caught up with some stuff!

    Marco.
    Main System

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

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and 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, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. 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 HW16.5 record cleaning machine.

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

  9. #619
    Audio Al is offline Pishanto Specialist & Super-Daftee
    Join Date: May 2012

    Location: Dagenham Essex

    Posts: 11,184
    I'm Allen.

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    I've been away on holiday abroad,

    Thats why its been nice and quiet recently

    Hope you enjoyed your time away
    [

  10. #620
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,546
    I'm AudioAl'sArbiterForPISHANTO.

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    Lol - glad you missed me!

    We did indeed enjoy our time away in France. Brought back a shed-load of wine and goodies for Christmas (how many days away is it now? ), so can't wait to get stuck into it all and share it with family and friends over the festive period!

    Marco.
    Main System

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

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and 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, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. 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 HW16.5 record cleaning machine.

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

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