Saint-Saëns planar- AKA SMJ-40- time for a project now?

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  • JonMarsh
    Mad Max Moderator
    • Aug 2000
    • 15315

    There were a LOT of legacy markings on that; when I figure it's a "take", I will probably mark it up some more as well as put together a BOM in Numbers and output a PDF for that!

    Yeah, you'll probably be wanting some sales on Dayton caps and stuff like that! And you might juggle the resistor values and quantities- that's where the Y in DIY comes in, right?

    Now, just imagine how out of sync it would be if we used Jantzen Alumen caps in the tweeter crossovers...

    🤪

    So, if I wanted to induce cardiac arrest in you, I could share a pic of my early "junk bin" tweeter crossover for the 2522 (which I'll update for the test version) with Clarity PUR, Clarity MR, and Jantzen Alumen caps... (plus some junky Jantzen Superior Z and Audyn Plus caps in the two notch networks..)
    the AudioWorx
    Natalie P
    M8ta
    Modula Neo DCC
    Modula MT XE
    Modula Xtreme
    Isiris
    Wavecor Ardent

    SMJ
    Minerva Monitor
    Calliope
    Ardent D

    In Development...
    Isiris Mk II updates- in final test stage!
    Obi-Wan
    Saint-Saëns Symphonique/AKA SMJ-40
    Modula PWB
    Calliope CC Supreme
    Natalie P Ultra
    Natalie P Supreme
    Janus BP1 Sub


    Resistance is not futile, it is Volts divided by Amperes...
    Just ask Mr. Ohm....

    Comment


    • JonMarsh
      JonMarsh commented
      Editing a comment
      Note, the midrange crossover update retuned things to reduce the capacitor sizes, but increase the inductor sizes of course- At one time I was thinking about a monster version with 2 PT5010 in parallel, so the crossover network was basically designed for 4 ohms. Then the LPAD adjusted to get the right attenuation for a single PT5010, while keeping the load impedance at about 4 ohms so that the filter worked correctly.
  • technodanvan
    Super Senior Member
    • Nov 2009
    • 1051

    I can only imagine your 'junk' bin Jon! I might need to adjust my goal given the cost of crossover components these days, but in keeping with the spirit of the 'PE' build I might stick with Dayton when possible. I do have several of the big 200 uF Solen caps, but I'm wondering about using electrolytic to keep final BOM cost down a bit....then it's just the coils that will add up fast. I'll have to try a few things to see what I can hear. Very excited for this one!
    - Danny

    Comment

    • JonMarsh
      Mad Max Moderator
      • Aug 2000
      • 15315

      Electrolytics for the zobel would be a "given" in my recommendations...

      Now, just to tease you a skosh, here's a pic of the test crossover for 2522 configurations in process, with dual notch filters and defeat switches that had been planned...


      Click image for larger version

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      the AudioWorx
      Natalie P
      M8ta
      Modula Neo DCC
      Modula MT XE
      Modula Xtreme
      Isiris
      Wavecor Ardent

      SMJ
      Minerva Monitor
      Calliope
      Ardent D

      In Development...
      Isiris Mk II updates- in final test stage!
      Obi-Wan
      Saint-Saëns Symphonique/AKA SMJ-40
      Modula PWB
      Calliope CC Supreme
      Natalie P Ultra
      Natalie P Supreme
      Janus BP1 Sub


      Resistance is not futile, it is Volts divided by Amperes...
      Just ask Mr. Ohm....

      Comment

      • letiennam
        Junior Member
        • Mar 2016
        • 14

        Perhaps the reason comes from the heat of this project. I found that the PT5010 is out of stock at parts-express, have to wait until July to get it back in stock. Would it be possible for you to share the STEP files sooner?

        Comment

        • JonMarsh
          Mad Max Moderator
          • Aug 2000
          • 15315

          No problem to do that-

          However, it's early in the morning and I'm getting ready to leave on a three day road trip to CA to get stuff out of storage, so it would be Monday before I could share. Just PM me an email address to send them to. I'll send the latest versions, of course!

          ~Jon
          the AudioWorx
          Natalie P
          M8ta
          Modula Neo DCC
          Modula MT XE
          Modula Xtreme
          Isiris
          Wavecor Ardent

          SMJ
          Minerva Monitor
          Calliope
          Ardent D

          In Development...
          Isiris Mk II updates- in final test stage!
          Obi-Wan
          Saint-Saëns Symphonique/AKA SMJ-40
          Modula PWB
          Calliope CC Supreme
          Natalie P Ultra
          Natalie P Supreme
          Janus BP1 Sub


          Resistance is not futile, it is Volts divided by Amperes...
          Just ask Mr. Ohm....

          Comment

          • JonMarsh
            Mad Max Moderator
            • Aug 2000
            • 15315

            STEP files and some comments sent...
            the AudioWorx
            Natalie P
            M8ta
            Modula Neo DCC
            Modula MT XE
            Modula Xtreme
            Isiris
            Wavecor Ardent

            SMJ
            Minerva Monitor
            Calliope
            Ardent D

            In Development...
            Isiris Mk II updates- in final test stage!
            Obi-Wan
            Saint-Saëns Symphonique/AKA SMJ-40
            Modula PWB
            Calliope CC Supreme
            Natalie P Ultra
            Natalie P Supreme
            Janus BP1 Sub


            Resistance is not futile, it is Volts divided by Amperes...
            Just ask Mr. Ohm....

            Comment


            • letiennam
              letiennam commented
              Editing a comment
              Thank you for your assistance. I received your email. I appreciate you taking the time to exhaustively describe and comment on the current WIP step files. It get me many info so that I would know what characteristics might be useful to look at closely for my selection process in the future.

            • letiennam
              letiennam commented
              Editing a comment
              Thank you for your assistance. I received your email. I appreciate you taking the time to exhaustively describe and comment on the current WIP step files. It get me many info so that I would know what characteristics might be useful to look at closely for my selection process in the future.
              Sorry, due to a network error, my comment was repeated twice
              Last edited by letiennam; 14 May 2024, 04:45 Tuesday. Reason: Sorry, due to a network error, my comment was repeated twice
          • JonMarsh
            Mad Max Moderator
            • Aug 2000
            • 15315

            Here's a simple graphic update of what I sent out for the rest of you. Additionally, I put together a project file combining both the MF-HF modules and LF module for visualization purposes. As mentioned many times, I still consider this WIP, not a final product. But it has potential for anyone wanting to plan, or to launch their own version.



            Click image for larger version

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            Click image for larger version

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            Click image for larger version

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            Yet to be determined is the final configuration of the base- though I have metal outrigger legs with point assemblies. similar to a Tidal style, I'm also pondering something more like one of Steve's Ardent builds...


            Click image for larger version

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            Isolators like Danny turned up could be quite useful.







            the AudioWorx
            Natalie P
            M8ta
            Modula Neo DCC
            Modula MT XE
            Modula Xtreme
            Isiris
            Wavecor Ardent

            SMJ
            Minerva Monitor
            Calliope
            Ardent D

            In Development...
            Isiris Mk II updates- in final test stage!
            Obi-Wan
            Saint-Saëns Symphonique/AKA SMJ-40
            Modula PWB
            Calliope CC Supreme
            Natalie P Ultra
            Natalie P Supreme
            Janus BP1 Sub


            Resistance is not futile, it is Volts divided by Amperes...
            Just ask Mr. Ohm....

            Comment

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