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Thread: B&W DM70; rebuilding an Icon

  1. #11
    Join Date: Jan 2014

    Location: Winkel - The Netherlands

    Posts: 40
    I'm Norman.

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    So it has been a while since my last update.

    The Power units are still being restored. I had some difficulties finding the schematics but thanks to a Dutch guy over at the http://www.vintage-radio.net/forum I got a copy.
    Next was finding the right (physical) 800 Ohm resistors; this is still a work in progress.

    The stands have now being made, all by hand and (almost) to original size / specs.
    They still need to get a layer of mat black paint.





    The cabinets have been freshly painted with RAL9010 and here are some images with the new stands.





    In two weeks I will drive up to Germany to have the Electrostatics renewed.
    Linn Majik DSM/2, Cambridge CD CXC, IOM classic, Tannoy "Langley"

  2. #12
    Join Date: Mar 2017

    Location: Seaford UK

    Posts: 1,861
    I'm Dennis.

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    If they are mild steel do use a Hammerite or similar for bonding and anti rust; that is a lot of work to sabotage.

  3. #13
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 4,737
    I'm jamie.

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    I like the picture of the lambretta, my guess is a model d
    My System
    John Wood KT88 Amp.
    Paradise Phono Stage
    Sony TTS-8000 Turntable.
    PMAT-1010 MK6 Tonearm.
    Ortofon Cadenza Bronze
    Sony X555ES Cd Player
    Yamaha NS1000m Speakers

  4. #14
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

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    Quote Originally Posted by jamie123 View Post
    I like the picture of the lambretta, my guess is a model d
    Horrible things!
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  5. #15
    Join Date: Oct 2012

    Location: NE England

    Posts: 4,173
    I'm Jez.

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    Quote Originally Posted by walpurgis View Post
    Horrible things!
    Yep. Land fill at best!
    Arkless Electronics-Engineered to be better. Tel. 01670 530674 (after 1pm)

    Modded Thorens TD150, Audio Technica AT-1005 MkII, Technics EPC-300MC, Arkless Hybrid MC phono stage, Arkless passive pre, Arkless 50WPC Class A SS power amp, (or) Arkless modded Leak Stereo 20, Modded Kef Reference 105/3's
    ReVox PR99, Studer B62, Ferrograph Series 7, Tandberg TCD440, Hitachi FT-5500MkI, also FT-5500MkII
    Digital: Yamaha CDR-HD1500 (Digital Swiss army knife-CD recorder, player, hard drive, DAC and ADC in one), PC files via 24/96 sound card and SPDIF, modded Philips CD850, modded Philips CD104, modded DPA Little Bit DAC. Sennheiser HD580 cans with Arkless Headphone amp.
    Cables- free interconnects that come with CD players, mains leads from B&Q, dead kettles etc, extension leads from Tesco

  6. #16
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 99,005
    I'm Grant.

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    Looking great Norman
    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***

  7. #17
    Join Date: Jan 2009

    Location: Essex

    Posts: 31,851
    I'm openingabottleofwine.

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    I bet those electrostatic tweeters and moving-coil woofers are producing a nice, clear and transparent sound.
    Barry

  8. #18
    Join Date: Jan 2014

    Location: Winkel - The Netherlands

    Posts: 40
    I'm Norman.

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    Quote Originally Posted by Barry View Post
    I bet those electrostatic tweeters and moving-coil woofers are producing a nice, clear and transparent sound.
    Yep, very "open"
    Linn Majik DSM/2, Cambridge CD CXC, IOM classic, Tannoy "Langley"

  9. #19
    Join Date: Jan 2014

    Location: Winkel - The Netherlands

    Posts: 40
    I'm Norman.

    Default

    Quote Originally Posted by jamie123 View Post
    I like the picture of the lambretta, my guess is a model d
    Nope, it is a model B.

    I used to have a few Lambretta's. Love them!
    Linn Majik DSM/2, Cambridge CD CXC, IOM classic, Tannoy "Langley"

  10. #20
    Join Date: Jan 2014

    Location: Winkel - The Netherlands

    Posts: 40
    I'm Norman.

    Default

    Time for another update!

    Filters and High Power Units have been reworked to specs.

    HPU


    Filters


    We have also tested them with the spare Electrostats that I have.

    Little nervous to power them on after being without power for years.

    But they switched on without issues, tone generator generated a nice tone with no disturbing noises or deformation.





    It is a shame that the aluminum fronts of the Electrostats are damaged and that replacement is no where to be found.
    I've decided I will use plain aluminum on the Electrostats and woofer to have a overall look.
    They will be painted (muffled) in black and I think it will be perfect.



    The woofers from the donor pair are removed form their cabinets.
    The stuffing is completely deteriorated and cannot be used so I have to find some other.

    Both woofers measure 6.3 Ohm.
    The're different in model looking at the magnet, probably one has been replaced under warranty.


    Linn Majik DSM/2, Cambridge CD CXC, IOM classic, Tannoy "Langley"

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