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Thread: Oscilloscope Recommendations

  1. #1
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    Oscilloscope Recommendations

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    Need help.

    I believe I am at the point in my "hobby" where I could benefit from having an oscilloscope on hand. I have very limited experience using one.

    I can't afford new and so I'm looking at used but I'm wondering:

    1. What is the minimum recommended bandwidth for working with analog audio circuitry?
    2. Any brands/models to seek out?
    3. Any brands/models to AVOID?
    4. Any general questions/points to ascertain on a scope's condition before buying?
    5. Any other pitfalls to watch for?


    Thanks in advance.

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    Before the ACMP debacle I would have said 1mHz, but didn't crazydoc that oscillation at 70mHz?

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    Sweet, () in short:
    Look for 10MHz (or up) two channel with pair of probes included and the one that is described as in "good working condition" . If You don't have experience working with a scope you sure would want to have the original manual for the unit.
    I can't speculate about brands. I use B&K 15MHz, got it on eBay for $120+Sh , it does pretty much everything I need.
    You know, that it's always a risk when buying used off eBay, but, hey ... you can get a nice useful unit for around 100-200 bucks. Take time searching eBay, don't just jump on something, this way you'll collect some "data" before making decission.
    Also while you on it , get yourself an adjustable bench power supply (you'd want some unit that gives you dual DC power supply (+ and -) 0-15VDC (for most common circuits), some sort of signal/function generator and a couple of units of breadboards. You'll want to have this stuff. I think I already mentioned this before
    *********

    Before the ACMP debacle...
    which one???:
    ACMP American College of Medical Physics
    ACMP Accompany
    ACMP Acquisition Career Management Program (US DoD)
    ACMP Advisory Committee on Marine Pollution
    ACMP Alternating Current Motor Pump
    ACMP Allied Configuration Management Publication (NATO)
    ACMP Annual Cost Monitoring Plan
    ACMP Anime Colony Mercenary Police
    ACMP Association of Church Musicians in Philadelphia
    ACMP Association and Community Managing Professionals (Houston, Texas)
    ? ? ?



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    Yes, MsH, it was at a high frequency, but it should still show up as a smudge on the waveform even at a lower sampling frequency. It just wouldn't be resolvable as a waveform.

    I've been generally happy with my Tektronix.TDS2014B. But I think you'll find that their cheaper models are also solid. For example:

    http://cgi.ebay.com/Tektronix-TDS100...3A2%7C294%3A50

    I really prefer the LCD versions because they shouldn't burn in.
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    I'd recommend getting an old used dual trace 10 to 15MHz scope. Something like this: http://www.used-line.com/c6784003s43...onix_T922R.htm
    You should be able to find a large variety of such scopes for under $100. Check your local Craigslist.

    This should fulfill your needs for most work for several years. Using it will show you its limitations, and you can then make a more informed decision on a better one, if you're still inclined.

    I had a Heathkit single trace 3MHz untriggered scope for many years. Even this was a huge help, with all its limitations, and I wasn't afraid to break into it for mods. And I still have it.
    I'm going through a difficult period - it's called life

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    There's this USB scope I've been wanting to get, but it's only 200kHz which is barely better than what I can do with audio converters I like the small package though

    Anyway, just tonight I've finished up three months worth of work on my portable preamp Could have used a scope, but I eventually tamed the oscillation I knew was there but couldn't quite see

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    Quote Originally Posted by mshilarious View Post
    There's this USB scope I've been wanting to get, but it's only 200kHz which is barely better than what I can do with audio converters I like the small package though
    Yeah, that's why I like my Tektronix. It's small.
    Quote Originally Posted by Obi-Wan
    If you mod me down, I will only grow stronger.

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    I like to watch mine in a lisagious pattern going to the beat...I think I might just be just mad enough to add a tesla coil to the laboritory.

    Sure you call me crazy...but I will re-animate Micheal Jackson and have my revenge on those little boys that have been walking on my lawn

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    Thanks for all the advice/recommendations everybody...it helps a lot. I've used evm1024's tek 465 to diagnose the bias amp on my Tascam 58 and that's about it, but it gave me an idea of how they work and what you use them for...plus I've used a PC-based oscilloscope plugin a number of times to setup azimuth, so I've got a little grounding (pun unintended). Obviously don't need anything fancy, but want something that is reputable and will provide minimums.

    Thanks!

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    i used to like the tecktronics o scopes. I used one while working at xerox, and also came in handy for adjusting anti skate on turntables. yep comes in handy for that too.

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