Free 173 Best Homemade Tools eBook:  
Get 500+ homemade tool plans, tool build guides, ebooks, and much more.

User Tag List

Results 1 to 2 of 2

Thread: LM3886 amplifer - shiny frame

  1. #1
    Supporting Member rendoman's Avatar
    Join Date
    Nov 2015
    Location
    Italy
    Posts
    389
    Thanks
    434
    Thanked 455 Times in 220 Posts
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    rendoman's Tools

    LM3886 amplifer - shiny frame

    Hi all!
    I just finished the new frame for my LM3886 amplifier.
    As usual, steel frame, sturdy, no vibrations, no heat, it's like an heavy anvil, motionless

    15mm square tube, 1,5mm thickness. 2mm aluminum plates, hand polished.
    I built all parts mounted in the front panel, binding post and led holder.

    I modified the power supply with a better transformer, new caps (I built this amp, old version, 16years ago) with different capacity for a lower ripple and better sound. The LM operational amp seems not critical even with switching or not well regulated power supply. I will mount Schottky diodes, for top grade rectifier.
    The led is an ultrabright UV type, connected to main 230v AC rail with cap-diode-resistor.
    RAL6011 color, I chose powder coating from a good local painter.

    That's a 50w amplifier - 8ohm load with +/- 35v DC power supply. I'm using with satisfaction as subwoofers amplfiers. It sounds nice also as main amp, I advise this circuit for good listening session, above all if you require more than 8watt /channel. I bought from old National selected and genuine opamp, not the poor quality China counterfeit parts available everywhere.

    If someone is interested, that's the datasheet, you only add a dual rail power supply.

    http://www.ti.com/lit/ds/symlink/lm3886.pdf

    LM3886 amplifer - shiny frame-dsc04119_1600x1200.jpg LM3886 amplifer - shiny frame-dsc04120_1600x1200.jpg LM3886 amplifer - shiny frame-dsc04121_1600x1200.jpg

    LM3886 amplifer - shiny frame-dsc04109_1600x1200.jpg LM3886 amplifer - shiny frame-dsc04108_1600x1200.jpg LM3886 amplifer - shiny frame-32150262_10215962401875609_1679838288732487680_o.jpg

    LM3886 amplifer - shiny frame-31913980_10215910226211250_8809336356296720384_o.jpg LM3886 amplifer - shiny frame-31218648_10215841945984287_60990391029071872_n.jpg LM3886 amplifer - shiny frame-31183500_10215839855972038_6322278416187916288_o.jpg

    LM3886 amplifer - shiny frame-31064308_10215820523488738_2408031104503119872_o.jpg LM3886 amplifer - shiny frame-30762554_10215820522128704_2130216165778128896_o.jpg
    45 Best Harbor Freight Tool Modifications


  2. The Following 2 Users Say Thank You to rendoman For This Useful Post:

    PJs (05-13-2018), Seedtick (05-12-2018)

  3. #2
    Content Editor
    Supporting Member
    DIYer's Avatar
    Join Date
    Aug 2013
    Posts
    3,090
    Thanks
    552
    Thanked 1,314 Times in 1,185 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    500+ Homemade Tool Plans



    Thanks rendoman! We've added your Amplifier Housing to our Miscellaneous category,
    as well as to your builder page: rendoman's Homemade Tools. Your receipt:



    Forge Build Guide



    Post your reply!
    Join 42,532 of us and get 500+ tool plans, tool eBooks, build guides, and much more.



    eBooks for Supporters

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

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