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Quick Scope Question

Discussion in 'Electronic Equipment' started by Garrett Mace, Feb 7, 2004.

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  1. Garrett Mace

    Garrett Mace Guest

    I need to pick up an oscilloscope on the cheap, and I notice a lot of Tek
    465's have been going through eBay recently, in the $150 to $250 range. I am
    used to newer scopes, so I haven't had the opportunity to use a 465 before,
    though I have a hazy "feeling" that they were supposed to be decent, though
    somewhat dated.

    I'd appreciate any comments for or against this scope, regarding durabilty,
    usability, trace quality, and how much longer I can expect one to operate in
    this stage of its life. 100Mhz is enough for my uses.

    Thanks
     
  2. Robert Baer

    Robert Baer Guest

    I understand that they are very goo, and that you should expect at
    least 10 years of service.
     
  3. BFoelsch

    BFoelsch Guest

    I have had a few 465s, and continue to repair orphans when they land on my
    doorstep.

    They are a decent unit. The biggest single trouble I have is that most, if
    not all, of the semiconductors are in sockets, and after 30 years the
    corrosion routine sets in. Usually just a wiggle will fix it up. There are
    also a few proprietary Tektronix ICs, but I have never had trouble with
    those. I also have trouble with noise in the the trimpots and attenuator
    switches, which are just little jumpers on the PC board. These can usually
    be cleaned by flooding them with Freeze Mist, which I like because it leaves
    no residue.

    Units are fairly east to service, not too many layers deep. I don't mind
    using one. If the CRT is good, they should hang on for quite a while.

    (Shameless commercial plug) If you are perchance in New England, I have an
    orphaned 465 that needs a little TLC. Has an occasional problem with the
    delaying sweep, and a vertical aberration that can more than likely be
    adjusted out. Noisy CH1 attenuator on some ranges. Will eventually finish it
    up, but I really don't need it. Will consider reasonable offers or trade for
    a pair of decent 100X probes.
     
  4. Jamie

    Jamie Guest

    well i have a 464 and its aprox 70 Mhz scope as far as i know.
    i think the 465 is a 100 mhz
    the 485 i have is a 300 Mhz.
    etc.
    depending on what your doing its ok..
     
  5. Jim Yanik

    Jim Yanik Guest

    464 should be a 100Mhz bandwidth(at -3db point) in non-storage mode.
    You need calibration of the vertical amp and attenuators.
     
  6. Robert Baer

    Robert Baer Guest

    Actually, those sockets should not corrode, because they were gold
    plated.
     
  7. Jim Yanik

    Jim Yanik Guest

    The IC pins that got stuck into them were not gold-plated,though.I've seen
    IC pins turn black with corrosion.Some TEK products had service notes about
    replacing all the IC DIP sockets because of IM problems.
    For a 1410 mainframe and all 6 of it's modules(video test generator),that
    was a major PITA.That's 20-plus PCBs loaded with DIP sockets.
     
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