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Buying an oscilloscope?

Discussion in 'Electronic Repair' started by Boris, Jun 30, 2004.

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  1. Boris

    Boris Guest

    Can anyone direct me where can I buy a cheap (and still usable) oscilloscope
    in the US? I need it for home electronics (hobby) and think about spending a
    few hundred dollars on a reasonably good scope.
    Thank you!
     
  2. Eugen T

    Eugen T Guest

    Try ebay - there are many many good used scopes at reasonable prices out
    there, especially in the US.
     
  3. DaveC

    DaveC Guest

    Search e-Bay for some good used Tektronix scopes. Be sure it's not an old
    tube-type, but other than that, you should be able to find one for a good
    price.

    Search auctions that have ended for a Tek scope, and if it hasn't sold, make
    the seller an offer, privately. Sometimes you can get a good deal that way.

    Good luck,
     
  4. Boris

    Boris Guest

    Dave, what do you mean by "not an old tube-type"? I wouldn't even hope for a
    low-priced used LCD one. Or should I?
    Thanks for the e-Bay tip!
    Boris


    DaveC:
    "Be sure it's not an old tube-type, but other than that, you should be able
    to find one for a good
    price."
     
  5. Sofie

    Sofie Guest

    Boris:
    I think what Dave C meant in his reply post was to stay away from an
    older CRT scope that uses vacuum tube circuitry..... stay at least with
    solid state circuitry with the CRT display.
    Lots of good values out there particularly for the Tek 465 , 475, 453,
    454, and similar vintage scopes built in the mid 70's and early 80's......
    all of these will be solid state with a CRT display. Depending on
    condition and how badly the seller wants to get rid of it you can purchase
    them for a few hundred dollars plus or minus. EBay is a good place to
    start.
     
  6. Jim Yanik

    Jim Yanik Guest

    I'd look for a working TEK 2213,2215(60Mhz)
    2235,2236,465(100Mhz)
    475(200Mhz)
    T922(15Mhz)
    T932,T935,442(35Mhz).

    (all portables)

    The last 4 are more low-end,"budget" scopes than the others.
     
  7. Joe

    Joe Guest

    Pages of scopes on Ebay.

    Dont know what you need but I have 2 spares
    A Hickock Model 515 at $75

    B&K dual trace portable with a brand new 7AH gel battery, case, charger at
    $125
    Both are around 5-15 Mhz bandwidth, solid state.

    I also have an NLS 1.7 inch cigar box size battery operated and a Tek 465B
    someplace
    I have a digital SLR can take pix


    -Joe
     
  8. Asimov

    Asimov Guest

    "Boris" bravely wrote to "All" (30 Jun 04 13:15:08)
    --- on the heady topic of ""old tube-type""

    Bo> From: "Boris" <>

    Bo> Dave, what do you mean by "not an old tube-type"? I wouldn't even hope
    Bo> for a low-priced used LCD one. Or should I?
    Bo> Thanks for the e-Bay tip!
    Bo> Boris


    Bo> DaveC:
    Bo> "Be sure it's not an old tube-type, but other than that, you should be
    Bo> able to find one for a good
    Bo> price."

    The problem with tube-type scopes is that they take about 30 minutes
    to reach the operating temperature so as to achieve calibration specs.
    Also their long term stability is rather primitive in comparison to
    solid state scopes because tubes get weak as they age more quickly.

    A*s*i*m*o*v

    .... Of course it's grounded! ...watch, ...YEEEEEAAAAAAAAHHHHHHHH!!!!
     
  9. Eugen T

    Eugen T Guest

    I got awesome deal on HP 1725A 300MHz scope last year on ebay. Really happy
    I didn't go up in price for more pricy 100MHz Tek scopes even though I
    wanted Tek at that time.
     
  10. Boris

    Boris Guest

    Hey Eugen,
    could you please quote the price you paid (incl. S&H) for the HP 1725A
    300MHz. Condition? I am still trying to figure out what is a "good deal"
    when buying an used scope...
    Thanks,
    Boris


    Eugen T:
    wanted Tek at that time.
     
  11. Boris

    Boris Guest

    Hey Joe,
    Could you please describe a little bit more on the portable NLS scope. This
    really sounds like something that would do the job for me - I am using the
    scope for hobby electronics and repairs and am spece-concerned. I guess it
    with an LCD. Can you provide some link on the web (what is the brand)? Any
    close alternatives on the market?
    Thanks,
    Boris
     
  12. Eugen T

    Eugen T Guest

    Hi Boris,
    I was trying to find something in Canada, so it took me some time to find
    this scope. I don't remember exact price, but I paid close to $400CDN ($300+
    US) after shipping. Scope came without probes, but 100MHz-rated probes are
    pretty cheap; on the other hand, I paid ~$30-40US for 300MHz rated probe.
     
  13. Jim Yanik

    Jim Yanik Guest

     
  14. Jim Yanik

    Jim Yanik Guest

    I believe this NLS scope had a very small display(CRT,not LCD),and you
    really want something with a larger display,perhaps 4-5 inches diagonal.
    Something where you can SEE the waveform and actually make measurements off
    the graticule.
    For low cost and simple operation,get a TEK T922(15 Mhz) or T932/35 (35
    Mhz).
     
  15. Kevin Carney

    Kevin Carney Guest

    1725's gave us trouble with the time base switches, vert & horizontal and
    triggering mode switches. He should have bought a Tek. Our cal lab never
    had a tech with an HP analog scope on his bench. This is not to disparage
    HP because they make incredible equipment too. Tek just had them beat on
    analog scopes. HP wooped Tek on digital scopes in the beggining (1983 or
    so).

    --
    change .combo to .com for correct email

    ***************************************************
    "We ought always to know precisely why a given job
    is done in a particular way, and why it is done at
    all, and why it can't be done more efficiently,
    if it must be done at all."-- T.J.Watson

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

     
  16. Ebay, but before you bid on anything you should just watch the auctions
    for at least a few weeks, so you know what the trends are in terms of
    what's available, in what condition, and for how much.

    A lot of auctions on ebay end at much too high a price because the
    bidders were newbies. It doesn't matter if you have previously won ebay
    auctions in other categories. Whenever you look to bid on something in
    a category that you haven't bid on before, you become a newbie again.
     
  17. The only way to learn that is to watch the auctions. When you see one
    that looks interesting, click on "Add to watch list", then go to your
    "My ebay" page and see all the auctions you put on your list. Most
    auctions last a week, varying from 5 to 10 days. Keep searching for new
    ones and adding them to the list, and watch them for a few weeks or a
    month to see what sold and for how much. Then you will know how to bid
    without over-bidding.
     
  18. Gobzo

    Gobzo Guest

    Boris:

    Try a local technology colledge. They may change programs from time to
    time and sell out outdated equipment.

    Gobzo
     

  19. It's funny. I've used Tek and HP equipment ever since the late 1950's
    and Tek never did learn how to make a really good usable spectrum
    analyzer, and HP never learned how to make a good user-friendly scope.
    Something in their corprate culture, the water differences between
    Portland and California, or the phase of the moon when stuff was
    designed.

    H. R. (Bob) Hofmann
     

  20. It's funny. I've used Tek and HP equipment ever since the late 1950's
    and Tek never did learn how to make a really good usable spectrum
    analyzer, and HP never learned how to make a good user-friendly scope.
    Something in their corprate culture, the water differences between
    Portland and California, or the phase of the moon when stuff was
    designed.

    H. R. (Bob) Hofmann
     
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