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HP 1722A

Discussion in 'Electronic Design' started by Michael Robinson, Jul 7, 2013.

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  1. A guy clearing out his deceased father-in-law's basement let me have an HP
    1722A oscilloscope. It powers up, and responds to signals. I haven't
    tested all the functions, but the basic stuff works. I'm thinking of
    selling it. How much is a working 1722A worth?
  2. Below is a link to a 1974 HP Journal that will give you the skinny on
    the 1722A's far out capabilities. Catch you on the flip side.

    Best regards,
    Spehro Pefhany
  3. miso

    miso Guest

    I still have two functional 1725As. The problem is those old scopes have
    hybrids in them. You need a spare scope to keep them going.

    Actually I bought one working 1725A years ago. I found a cheap junker
    for parts. My junker ended up supplying parts for someone elses 1725A.
    [Gratis on my part because I'm just sooo nice.] So when the person
    wanted to get rid of that 1725, I figured I better buy it since it had
    all my parts in it anyway. Plus having a spare functional 1725A kept the
    other scope scared shitless of being a parts scope, and then it never quit.

    But I think I paid $100 15 years ago. Today you would be far better off
    just putting the money into a Rigol than getting a 70's era HP scope.

    I've turned down working Tek 7904s with all the plugins for $150. And
    that was with the cart included. [You need the cart for those boat

    But the 1722 is like the 1725 in that they are reasonably high
    bandwidth. Sometimes it is nice to have an analog scope as a sanity check.

    The delayed sweep is kind of funky on those old HP scopes. They weren't
    particularly popular when they were new. The trigger was much maligned,
    but I never found it to be as horrible as some stated.
  4. miso

    miso Guest

    Well, the Tek scopes of that era were a bit better on the trigger. But
    the talk around the water cooler was the HP scopes didn't work at all,
    and that wasn't the case.

    The Tek 465 was basically the workhorse at the time. Or at least the 400
    series. I may not have the exact timeline, but the 465 was a late 70's
  5. josephkk

    josephkk Guest

    275 MHz scope with interesting delayed sweep trigger is interesting.

  6. 1974 dress code. I also had white bellbottoms, wide belt with hippie engraving, and platform shoes.
  7. Nico Coesel

    Nico Coesel Guest

    I had a white jumpsuit with space for a diaper and every women smiled
    to me instantly :)
  8. Tim Williams

    Tim Williams Guest

    Early 70s I think -- of course, they would've had more market share and
    better prices by the latter end. My 475 for instance is dated 1973 or so
    (465 of course predates it by a couple).

  9. The last decent HP scope was the 130C.

    To HP, "trigger" was a horse.

    It has been downhill forever after.

    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
    rss: email:

    Please visit my GURU's LAIR web site at
  10. that documents goes on about BASIC timesharing computer systems.

    the competition between HP and GE must have been quite fierce.
  11. tm

    tm Guest

    Now that is funny. I must agree.

  12. sms

    sms Guest

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