Iron Chef Coolidge builds an ODS #183

Discussion in 'Building the Classics' started by coolidge56, Aug 28, 2020.

  1. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    The boutique pantry is fully stocked with fresh components.

    cd01.jpg

    This build's secret ingredient is...

    secingred.jpg

    Film and TIN FOIL caps!

    cd02.jpg

    Allez Cuisine!!

    cd03.jpg
     
  2. Travis398

    Travis398 Well-Known Member

    Joined:
    Dec 7, 2011
    Messages:
    754
    Likes Received:
    1,067
    Location:
    USA
    lol, I see you are cooking with GAS for this one. Using the finest ingredients, are those fresh picked PEC pots you have there? Transformers look perfectly ripe also. I can already smell the fresh aroma of solder and flux coming from the kitchen.
     
    coolidge56 likes this.
  3. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Yes judge @Travis398 iron chef Coolidge is using succulent stainless PEC pots. lol Honestly I searched for a lower cost alternative to the PEC pots because they have become ridiculously expensive for a pot. No luck there, the choice is either cheap quality or expensive quality.

    I REALLY wanted to try the new CTS Cermet (ceramic/metal) pots which look damn sexy. The cermet element has a lifespan of 300,000 operations. But the line is missing a key 250 audio value needed for this amp and the 500k and 1M audio pots have 2 inch long shafts I'd have to cut down.

    Indeed Mercury Magnetics transformers and choke. I went with a laydown PT as this chassis hangs upside down traditionally. There's still a chance I'll break with tradition and go upright.

    This will be the 100 watt EL34 ODS #183 variant.
     
  4. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    I'm heading in this tone direction with this build.



     
  5. Travis398

    Travis398 Well-Known Member

    Joined:
    Dec 7, 2011
    Messages:
    754
    Likes Received:
    1,067
    Location:
    USA
    I have spent some time listening to an ODS, in fact I have driven several states away on a few occasions just to hear it in person. Never disappointed

     
    coolidge56 likes this.
  6. neikeel

    neikeel Well-Known Member

    Joined:
    Feb 12, 2014
    Messages:
    4,624
    Likes Received:
    3,023
    I appear to be seeing in stereo! Different build specs for each?
     
  7. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Yes I have components for 2+ of these. Certainly the 1st will be to specs, we'll see how it sounds and go from there. Found a new CNC punch press shop to make the chassis there's a big hurdle cleared.
     
  8. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Made some progress on the boards.

    Filter Cap board

    ods01.jpg

    Rectifier and Bias supply board. Includes fuse holders.

    ods02.jpg
     
    neikeel likes this.
  9. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Iron Chef Coolidge: Chairman, the exquisite main course is plated.

    ods03.jpg
     
    Guitar-Rocker likes this.
  10. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Oh yeah, it begins at 0:25

     
  11. South Park

    South Park Well-Known Member

    Joined:
    Sep 14, 2019
    Messages:
    2,906
    Likes Received:
    2,403
    So are those boards going to be up for sale
     
  12. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    I think I'm done with this board set. Time to pop a top on an ice cold adult beverage phew that was some work!

    Added...relay power board, relay boards, and a bunch of mini boards.

    ods04.jpg
     
  13. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Unlikely, I have avoided selling boards like the plague. With my intense day job I just don't have the bandwidth.
     
  14. South Park

    South Park Well-Known Member

    Joined:
    Sep 14, 2019
    Messages:
    2,906
    Likes Received:
    2,403
    Just a idea . I looked at the schematic And the tone stock is yearly in the preamp something that ken Fisher would build . I need to look at it more
     
  15. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Final edits completed and sent the manufacturing plots over to PCBPrime for a price quote.

    - nudged screw holes to even on center distances from each other
    - refined a few copper traces
    - double checked accuracy to schematic one last time
    - added the red center lines the router will follow to separate all the sub-boards
    - Preamp board is 3.1 x 9.5 inches
    - Filter cap board is 4 x 5.5 inches​


    ods05.jpg

    ods6.jpg
     
    Dogs of Doom likes this.
  16. Travis398

    Travis398 Well-Known Member

    Joined:
    Dec 7, 2011
    Messages:
    754
    Likes Received:
    1,067
    Location:
    USA
  17. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Finished the chassis CAD 22x9x2.5 inches. Shooting for a 24 inch wide head shell.

    chassis10b.jpg
     
    Dogs of Doom likes this.
  18. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Inbound 60's dual O getter Mullards!

    mullard.jpg
     
  19. coolidge56

    coolidge56 Well-Known Member Double Platinum Supporting Member

    Joined:
    Jan 30, 2019
    Messages:
    992
    Likes Received:
    2,117
    Location:
    WA state hinterlands
    Got the tracking # for the boards today, they arrive Tuesday!
     

Share This Page