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  1. J

    Anatomy of a high efficiency high output electrostatic loadspeaker.

    I should have thrown in a caveat about the DW's relative efficiency, considering their 1/4" d/s. From what I've read, they had some heft at frequencies lower than most ESLs can muster. I do pretty well with the mechanical aspects of building ESLs but I have no background in electronics and I...
  2. J

    New to Martin Logan, but not to Electrostatic speakers

    Further thoughts: I think you're ultra-efficient Dayton Wrights have spoiled you :-) So glad you posted the DW photos: Aside from DW's SF6 and ultra-high voltages, I immediately noted the ultra-small stator slots, making finely spaced conductors-- no doubt resulting in a uniformly dense...
  3. J

    New to Martin Logan, but not to Electrostatic speakers

    I see your point. The impact could have pulled apart the flimsy connection between the bias supply lead and thin foil charge ring. In your photo I see a greenish coloration on the exposed ends of all three panel wires. Is that corrosion or merely an artifact of the lighting? It's easier...
  4. J

    What Are You Listening To Right Now?

    At about 55 seconds into this tune, say a prayer for your subs: This whole album has wonderful low bass:
  5. J

    What Are You Listening To Right Now?

    This is one of my go-to recordings to show off my system:
  6. J

    Anatomy of a high efficiency high output electrostatic loadspeaker.

    Coincidentally; This thread about repairing a pair of DW ESLs was recently posted on the DIY Audio forum: https://www.diyaudio.com/community/threads/dayton-wright-esl.414329/#post-7719256
  7. J

    Anatomy of a high efficiency high output electrostatic loadspeaker.

    I just sent my ESL builder/mad-scientist experimenter friend Jer a link to this thread. Jer builds incredible stuff from practically nothing; winding his own trannies, and he posts his experiments on the DIY Audio Forum. He likes pushing the limits on voltages and SPL. I recall one of his...
  8. J

    New to Martin Logan, but not to Electrostatic speakers

    Just curious... do you see any physical damage (bent or dented stator, chipped stator coating, etc...) on the panel that hardly outputs any sound? If no physical damage is evident, you might want to hang on to that panel and rebuild it someday-- it might be easier than you imagine.
  9. J

    Anatomy of a high efficiency high output electrostatic loadspeaker.

    One more question: Can you even get the SF6 gas to restore the panels?
  10. J

    Anatomy of a high efficiency high output electrostatic loadspeaker.

    Wow! ESL Fan, I really appreciate your posting details of the Dayton Wright ESL's construction. I've always wondered about them and your posts are fascinating. I heard somewhere that their transformers are really massive, about 40 lbs (?).
  11. J

    Custom ESL using quest panels

    Hearing is believing. I wouldn't recommend my cheap toroid setup for driving full range ESLs, but I can attest from experience that a tandem pair of single-primary 50VA 230V/6V toroidal power transformers (75:1) works quite well driving hybrid ESLs operating above 200Hz, and the sound quality...
  12. J

    New to Martin Logan, but not to Electrostatic speakers

    You obviously have a passion for ESLs and I'm looking forward to your planned thread about the Dayton Wright design decisions. I've read about the Dayton Wright ESLs but there aren't many around anymore so it's unlikely I would ever hear an original pair, but I might get lucky and someday...
  13. J

    New to Martin Logan, but not to Electrostatic speakers

    Hey, didn't know you were in GA. I doubt ML uses a special wire for the transformer leads-- the Theater center channel speaker I recently rebuilt had standard 300V wire and the leads were even twisted. If you have to replace a transformer lead in, any speaker wire would do. If you have to...
  14. J

    New to Martin Logan, but not to Electrostatic speakers

    The panel/stator surface areas would be identical so I'm thinking any significant capacitance difference could only result from different stator-to-stator gaps or a shorting path or some interaction with the diaphragm(s). I recently replaced the diaphragm on a ML Theater center-channel speaker...
  15. J

    New to Martin Logan, but not to Electrostatic speakers

    Hi and welcome to the forum. I'm just curious whether you are wanting to know what the stator-to-stator capacitance of the panels should be or what their stator-to-diaphragm capacitance should be. The stator-to-stator capacitance is determined by the panel area and gap between stators, and...
  16. J

    More changes over the last year and retired

    Hi Jeff, and congrats on your retirement. I retired 18 months ago and loving it. You have a beautiful setup. I especially like the CLS's blond oak frames, and I'm wondering if their stands are custom made. Nice setup! Charlie in Savannah, GA
  17. J

    Electromotion ESL panels fading issue.

    There are wasy If you had a data sheet for your specific transformer you could check its winding resistances and verify no continuity (shorts) between windings, and you could even feed in an AC voltage and measure the voltage out to verify the step-up. A shorted transformer would trip your...
  18. J

    Electromotion ESL panels fading issue.

    I play the stereo really well, lol. No, I'm not a musician, just a jazz fan. I have a special fondness for female jazz singers, and ESLs let me hear them with exquisite fidelity.
  19. J

    Electromotion ESL panels fading issue.

    The symptoms you describe are consistent with low charge on the diaphragms, more likely due to the coatings having lost conductivity rather than merely being dirty. Shower cleaning could restore some output if contamination was the cause but I think that's a long-shot. You mentioned that your...
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