+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Gainclone builders

  1. #1
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with far away trains passing by...

    Posts: 13,054
    I'm David.

    Default Gainclone builders

    Apologies if this has been mentioned before, but in the Mini-T amp enthusiasm, I fear that kit amps based on the Gainclone may have gone out of fashion...

    Has anyone made one of these up. What did the end result look like and obviously, how did you think it sounded?

    I ask because - it appears the Mini-T doesn't perform at its very best into BBC Legacy speakers, the bass disappearing and the soundstage seemingly rather flat ina very non HiFi kind of way. Enough people have had the opposite results with different speakers for me to assume it's just incompatibility here.. The gainclone only has around a dozen components, all the work being done in the chip itself, the power is around 40W conservative class AB I believe and Audiosector do some nice looking kits. All one nees is a transformer or two (for full dual-mono operation) and a heatsink plate cum case to put it all in....

    Thoughts chaps?
    Dave R

  2. #2
    Join Date: May 2008

    Location: Cricklewood

    Posts: 9,082
    I'm ILOB.

    Default

    They are suppossed to be quite good. I am playing around with this at present http://www.ebay.co.uk/itm/MKll-Versi...item3a740a6631
    A lot more bass than the standard version which for me did not have a enough grunt, still might be enough for your speakers but then their this
    http://www.ebay.co.uk/itm/PAIR-MKII-...item3a732e9d02
    Loves anything from Pain of Salvation to Jeff Buckley to Django to Sarasate to Surinder Sandhu to Shawn Lane to Nick Drake to Rush to Beth Hart to Kate Bush to Rodrigo Y Gabriela to The Hellecasters to Dark Sanctury to Ben Harper to Karicus to Dream Theater to Zero Hour to Al DiMeola to Larry Carlton to Derek Trucks to Govt Mule to?

    Humour: One of the few things worth taking seriously

  3. #3
    Join Date: Mar 2009

    Location: South West-ish, UK

    Posts: 138

    Default

    I build amps based on the LM3886 IC and they sound really excellent. I use mine to drive Briks - one's good, but two into a split crossover is better. One day I might even get around to going active with them. They're bullet-proof and the LM3886 is good for around 70W depending on the PSU.

    As ever with these things, the devil's in the detail and small circuit and component changes can make quite big differences to the end result.

  4. #4
    Join Date: Oct 2009

    Location: Wirral

    Posts: 55

    Default

    The Peter Daniels Audiosector LM3875 kits are lovely quality but be aware there is also someone on ebay using that name so ensure you get the right one. The Chipamp.com 3886 kits are very good too.

    I like the LM1875s best but they would be hard pressed to meet your power needs.

    John

  5. #5
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with far away trains passing by...

    Posts: 13,054
    I'm David.

    Default

    Thanks. I think I'd go straight to Audiosector in the first instance
    Dave R

  6. #6
    Join Date: May 2010

    Location: Leixlip, Ireland

    Posts: 121
    I'm Martin.

    Default

    Here's mine.
    Basically a clone of the AudioZone amp-2 based on a Peter Daniels Premium kit.
    This is an old pic, those yellow wired to the centre of the toroids are no longer there.
    It's a dual mono design with a 300VA toroid per channel. Internal mains wiring is Mark Grant.


    Since this pic was taken all the signal wire is now solid single core silver and the RCAs are silver CMCs.


    The case is from HiFi2000 in Italy (Modushop).
    The switches are Onpow.
    The feet are recycled from a dead Arcam tuner.


    I'm running 25v secondaries giving around 37v on the rails which is near the max for this chip. Theoretically that should mean 55-60W per channel.

    All in all it was a fun little project and even a build using top quality components won't break the bank. Sound bloody good too!
    Analogue: Technics SL1210 M5G, AN Arm One/II, Benz-Micro Glider SL, DIY Phono
    Digital: Meridian CD, SB Touch > dCS DAC.
    Amps: Luxman SQ38u
    Speakers: Usher Mini 2 Dancer DMD
    Cables: Supra, Mark Grant, Reference Fidelity

  7. #7
    Join Date: May 2008

    Location: Surrey

    Posts: 4,482
    I'm Rob.

    Default

    I have made several GCs. A few point to point LM3886s (one bridged - nice rats nest of wires!), a couple of LM3875 monoblocks. Very rewarding to build them from a schematic. I also had some Chipamp.com 3886 boards, but that amp never sounded as good as my "home brewed"

    Didn't realise I still had phuckbucket pic of the bridged amp

    http://i73.photobucket.com/albums/i239/saxonsex/soundburger.png

  8. #8
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with far away trains passing by...

    Posts: 13,054
    I'm David.

    Default

    That amp looks absolutely beautiful. My first effort may wel be on a blockboard chopping board I have, but of course everything will be exposed, which I'm not happy with. I'm sure a neat assembly, layout and vital attention to earthing makes all the difference
    Dave R

  9. #9
    Join Date: May 2008

    Location: Surrey

    Posts: 4,482
    I'm Rob.

    Default

    Have you seen the "basic GC" drawing on Decibel Dungeon? IMO the LM3875 makes a nicer sounding amp to the 3886.



    http://www.decdun.me.uk/gainclone.html
    http://i73.photobucket.com/albums/i239/saxonsex/soundburger.png

  10. #10
    Join Date: May 2009

    Location: Farnham, Surrey, UK

    Posts: 91
    I'm Alan.

    Default

    Dave,

    Like Puffin I have built several gainclones - the LM3875s sounding the best. I did build a 10-channel amp using Peter Daniels Premium kits (for a pair of Linkwitz Orion speakers) - they sounded pretty good!

    However I do not use this anymore so if you want to try out the sound I can loan you a pair of amp boards and psu's - the transformers are a bit heavy to send!

    Let me know if this is of interest.
    Alan.

+ Reply to Thread
Page 1 of 2 12 LastLast


 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •