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Carlspeak

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About Carlspeak

  • Birthday 08/08/1943

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    North Central Connecticut

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  1. kryten79 started following Carlspeak
  2. Jim Pearce started following Carlspeak
  3. leamonjo started following Carlspeak
  4. Carlspeak
    As you can see in Troels stacked experiments, mH values changed noticeably. I'd be much more concerned if the AR9 had stacked coils in the mid or HF circuits where your hearing is much more sensitive to.
  5. Carlspeak
    http://www.troelsgravesen.dk/coils.htm
  6. Carlspeak
    You've got a high likely hood of inductor cross-talk in a couple of spots due to their same orientation and close proximity to each other. One of the large coils in the left pic should be stood up on edge, In the right pic, stand the blue coil on edge. These changes should be beneficial to your speaker's performance. For more info. on inductor cross talk, visit Troels Graveson's web site. He has a nice chart there that shows recommended mounting of coils and distances.
  7. Carlspeak
    Seems like no easy DIY fix here. Time to scout out electronic repair shops near you?
  8. Carlspeak
    Have you tried disconnecting the woofer itself from the cables and testing it by itself to ensure the woofer is not blown?
  9. Carlspeak
    I fixed a powered sub once by opening it up and discovering a fuse inside had blown. Check your sub for fuses.
  10. Carlspeak
    OEM Callins and Temple caps are cr&p. They age terribly and drift way out of spec. I have a pair of 100uF Solen caps F.S. PM me if there's any interest.
  11. Aadams

    OK thanks for trying.  I will start another thread and you can delete my post from the Eyeglass thread.

  12. Aadams

    Carl

    I just posted erroneously into your earspeaker thread.  Can you please move my post to the Hybrid LST thread in the same forum topic, Mods and Tweaks.

     

    Thanks

  13. Carlspeak
    Looking forward to the major update!
  14. Carlspeak
    You can pay a fortune for Ohmite 15 ohm rheostats, or go with the prevailing recommendation of an inexpensive 8 ohm L-Pad with parallel 25 ohm resistor that will accomplish the same result. The AR3a restoration document goes into detail about the available options to replace the vintage AP pots. The recommendations are independent of the vintage of the AR speaker.
  15. Carlspeak
    Great write up AR surround. Nice spreadsheet!
  16. Carlspeak
    I sell a lot of premium linen grille cloth to vintage speaker owners. With it, I provide written instructions on how to install the cloth using a method I used on many cloth installs. Aileen tacky glue on all four sides, then fold the corners and staple only there. PM me and I'll be glad to email you those instructions.
  17. Carlspeak
    Is there a question there somewhere?
  18. Carlspeak
    I would refer you then to the published work of the late, great Roy Allison where he made measurements in a variety of real rooms. I suspect he documented well his measurement methodology. His AES paper is in the library. All others, I suspect, will have a lack of detail or be too variable to have any meaning.
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