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About genek

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  • Birthday 07/31/1953

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    Portland, Oregon

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  1. genek

    Inherited two AR3s. Need advice.

    If you have no experience, a pair of AR-3s is a bad place to start out. Considering that they were essentially "free," if you don't intend to keep them your best bet is probably to sell them as-is.
  2. genek

    Unable to upload pictures.....

    Reduce image size to 640x480 or smaller at 72 dpi and save as jpg with quality set at 30%. You'll get a file size 100 kb or smaller. You can view your attachments in "My Attachments" (just under the link to edit your profile). Click on the post an attachment is uploaded to, download and edit the attachment to reduce file size, add the smaller file to the post and then delete the larger file.
  3. genek

    AR3a grills

    Electric staple guns start at around $30 at Home Depot. You could also take it to an art/framing shop and have them stretch and staple it like a canvas.
  4. genek

    AR3a grills

    Velcro and a staple gun. That's what the later classic era models used.
  5. genek

    AR3’s for sale in California

    Postal zone 41, definitely pre-63.
  6. genek

    Another Mystery Speaker

    It's an old scam. Someone has a load of speakers in a nondescript van with no company logo on it, claiming to have name brand speaker "leftovers." They're cheap speakers with names like "JDL," "Altek," or just about anything "Research," that are intended to fool an unsophisticated buyer into thinking they're JBL, Altec or Acoustic Research.
  7. genek

    Another Mystery Speaker

    As I suspected from the first photo, this is not an Acoustic Research speaker. The name sounds like typical "white van" speakers.
  8. genek

    Another Mystery Speaker

    Can you post photo of the labels?
  9. First time I ever saw one of these was in a Marantz-branded speaker in the early 70s.
  10. genek

    A pair of AR-3 fell into my lap this week

    The solvents in nitrocellulose lacquer are the same ingredients used in many paint strippers. You definitely want to seal wood that you've stained, especially if you used a pigmented stain.
  11. genek


    A level control would probably be a good idea. How are you determining frequencies? Are you measuring, or just doing it by ear?
  12. genek

    Ar-3a Capacitor Advice

    CSP's focus is on repair and restoration. If you contemplated installing something in your vintage ARs knowing it was going to produce "differences in sound," and didn't make the necessary adjustments to compensate for those differences, we'd boot the discussion over to "Mods, Tweaks, and Upgrades to the Classics."
  13. genek

    AR-3s With Korina veneer!

    The long face that's in shadow in photo #2 looks stripey enough to be korina, but the tops don't. Could be that the photos are washed out or the tops have been sun bleached. The face frames just look like generic "blonde." Do we know if the korina cabinets had solid wood korina face frames, or did they use birch the same way they did for the pine cabs?
  14. genek

    Ar-3a Capacitor Advice

    In other news, the prize in The Amazing Randi's $1,000,000 audiophile speaker wire challenge has yet to be won, either.
  15. genek

    Ar-3a Capacitor Advice

    The biggest factors in capacitor longevity are how susceptible their dielectrics are to age and environment and how good a job their encapsulation does of holding back the effects of both. In the case of the Sprague Compulytics and the older oil-filled caps, their heavy-duty cans are as close to being bulletproof as you're going to find (I know from my past day job that some of them were actually designed to be bullet and explosion resistant). So it's pretty easy to see how they've preserved their contents better than wax, paper or plastic. Plastic film is less susceptible to age and environment than impregnated paper and the finished product is more stable and long-lived. But probably more importantly, capacitors using them are less expensive to manufacture and have a lower reject rate. They've dominated the capacitor market in general since the 1980s.