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Thread: L-pad replacement

  1. #16
    Senior Señor boputnam's Avatar
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    Originally posted by rgrjit8
    Well, I passed the Marine ground radio repair course...
    Ha! That is already coming in handy!

    But the rest of your post has me
    bo

    "Indeed, not!!"

  2. #17
    Senior Member lpd's Avatar
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    Just a reminder for l-pad needy folks..antique electronic supply is clearing out 8 and 16 ohm l-pads for cheap!! They appear to be of decent quality. I'll look up the part # later for those interested.

  3. #18
    Tom Loizeaux
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    Before removing foilcal...

    Before removing foilcal, it may be a good idea to buy a replacement L-pad and wire it in from behind the baffle by switching over the wires from inside. If that solves the problem, then proceed with the replacement, if it it doesn't, you can look further without unnecessarily tearing at your foilcal!
    I suspect it IS the L-pad though.

    Tom

  4. #19
    Senior Member GordonW's Avatar
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    Originally posted by rgrjit8
    Well the crossover is out. It looks pretty easy to work on. I'm tempted to just go ahead and replace all ten caps myself and see if that doesn't somehow "accidentally" fix it.

    I see nothing burned, leaking or loose so are the odds not in my favor that it is an open cap?
    Try using a short wire, and jumping across the in-line caps in the midrange circuit (JUST the ones in series with the signal, NOT the ones connected to ground), with the driver attached, and a source at low volume. You should be able to tell, pretty much immediately, if a cap is open... jump a bad one, and you should get sound from the mid...


    ************************************************

    Oh, now I get it!

    aluminum foil + decal = foilcal

    Now I know why no one ever told me, "Don't run with that sharp mind! You might fall and cut yourself!"

    - I don't HAVE ONE.
    ROTFL "Hey, watch out, you're gonna put an eye out with that thing!!" Man, don't sweat it, even the best of us do a "DUH" once in a while... :o

    Regards,
    Gordon.

  5. #20
    rgrjit8
    Guest
    Well it appears that I've violated the First Rule of Electronics:
    KISS Keep It Simple, Stupid!

    My wife took the crossover to the JBL service center. They said there was nothing wrong and that it must be a bad diaphragm in in the 2441.

    I rechecked the driver. It worked fine as I'd already determined.

    Then the wife mentioned how the tech had wiggled and pressed down all the spade contacts on the crossover wires before he'd run his tests.

    I put everything back together and it has been working fine for several hours now with now cutouts.
    It must have been a simple LOOSE CONTACT with a wire!

    Well at least it didn't cost me anything and I now have the 4355s in mirror image configuration.

    It's a drag about the foilcal though. (insert icon showing tears)

  6. #21
    Senior Member GordonW's Avatar
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    Ah, that's Rule One of Fixing Stuff that Don't Work:

    1) If it don't work and you can't find anything obviously wrong, take it apart, and put it back together again. It'll probably work afterwards.

    Regards,
    Gordon.
    been there, done that... more times than I can count!!

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