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ESR meter?

Discussion in 'Electronic Repair' started by Roy J. Tellason, Oct 18, 2003.

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  1. I see a *lot* of references to testing ESR on caps in stuff lately. I don't
    do this for a living any more, and sure as heck don't plan to go back to
    it any time soon. Got a Simpson 260 that's as old as I am (and still
    working well in spite of much abuse :), a coupld of DVMs, a Tek 2246
    scope, a B&K curve tracer, and a B&K cap meter, don't remember the model
    but it's the first LCD display autoranging unit they came out with, maybe
    20 years ago.

    What I'm wondering is if there's some way for me to measure or do go/no-go
    tests on caps for ESR without having to invest in equipment to do so?
    Maybe some ciruit that I could build, that wouldn't be too complicated?
    Is it possible to home-brew this stuff?

    This sounds like something I'd see a use for, but definitely not something I
    want to spend any bucks on at this point in time.
     
  2. Ace

    Ace Guest

    Check out Dick Smith site (dont know the url off hand but I always find it
    with Google) they have an excellent ESR meter as a kit for about $AU80 it
    measures ESR in circuit and out of circuit. I beleive they do mailorder. I
    dont service for a living but I built one simply to fix my own stuff.
     
  3. Bob Parker

    Bob Parker Guest

  4. Joe Rongen

    Joe Rongen Guest

    "Roy J. Tellason" <[email protected]DONTSPAM MEpa.net>
    wrote in message
    [snip]
    "QST" September, 2003 has just what you want.
    (QST mag. is available in many libraries.)
    Look for the article "How to test for capacitor ESR."

    You'll need a function generator, (or build your own
    simple 66 - 100 kHz sinewave oscilator) an oscilloscope
    and this rather well explained article - a two resistor
    circuit in an enclosure with two connecters.
    It's excellent for the occasional user. Have fun!

    Or have a look at www.buyanyaccessory.com
    (Canada: Global Electronics Supplies Inc)
    They have an in-line capacitor meter (1 - 10K MFD) on
    sale for Can$ 39.90 but are on a ~ couple weeks back order.

    Regards Joe

    "We'll never survive!"
    "Nonsense! You're only saying that because no one ever has."
     
  5. Nice...!

    That's exactly the sort of thing that I was looking for. I probably already
    have all the parts needed to build either version of that on hand here...
     
  6. Bad link for buyany... have you a working one? And I can't find Global
    Electronics without having a clue as to which city it might be in...

    Thanks!

    John :-#)#

    (Please post followups or tech enquires to the newsgroup)
    John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
    Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."
     
  7. john

    john Guest

    www.globalsemi.com

    Mississauga Ontario

    kip


    --
    "Watch the return E-Mail addy its false"
     
  8. john

    john Guest

    Part number at Global is

    MUL 3333

    kip

    --
    "Watch the return E-Mail addy its false"
     
  9. Joe Rongen

    Joe Rongen Guest

    Then try: http://www.globalsemi.com
    They are located in Mississauga, Ontario.
    Phone toll free: 1-800-668-8776

    The ESR meter to look for (in their Fall Specials) is model: MUL-333
     
  10. Bill Bolle

    Bill Bolle Guest

    I built the 99 Cent tester and it works great for me. I've fixed my
    DVD player, a monitor, a police scanner and a TV with it. It's quick
    and cheap but you do have to have a scope to make it work, this will
    prevent it's usage by a lot of home techs. You could possibly use a
    low reading voltmeter but most VOMs or DVMs won't read down into the
    millivolts that this thing reads in. Since you already have a scope
    you're in great shape to use this handy little device. It cost less
    then ten bucks to build.
    Hope this helps-------Bill
     
  11. Yeah. The only problem I have at this point in time is finding somewhere in
    this mess to actually set that scope up! Currently it's "sleeping" in the
    bottom-most (deep) drawer of my big red Snap-On boxes... And I don't
    think that there's enough horizontal surface in here anywhere at the moment
    to set it up! There's a 2 x 2 foot area on my desk that's relatively
    clear, and that's where I'd figured on setting one of those monitors to
    work on it...

    Overly cluttered office is too mild a description. :)
     
  12. Bill Bolle

    Bill Bolle Guest

    Don't feel like the "Lone Ranger". I drag all that stuff out of the
    closet and set it up on the dining room table, find the bad part,
    replace it and then drag all that stuff back into the catacombs. It
    takes almost as long "setting up" as it takes to trouble shoot and
    repair the apparatus. Nothing comes easy anymore!! However, I feel
    that I get a lot more information out of the display on the scope then
    I would watching a couple of LEDs blinking on a numerical scale. The
    waveform is important also, not just the amplitude----you will see
    what I mean after you have used the tester a few times.
    Bill
     
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