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    EEVblog #1022 – Finding A $50 Oscilloscope On Ebay

    Another look at finding a $50 analog oscilloscope on ebay. Forum HERE Podcast: DownloadBe Sociable, ...

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    • Aleksander_O

      Why was the video taken down?

      • radioman . lt

        it’s ridiculous… fucking nonsense, youtube shit..

        • radioman . lt

          beats me, at least download link works fine.

        • First time in a thousands videos, so I’m not complaining too much.

      • No reason was given apart from “spam” related.

        • Aleksander_O

          That deserves a push of the “bullshit” button 🙂

    • Nick

      Apparently its “Commercially deceptive”. Crikey – sounds like the same guys who have Dave on their block list for certain components….

    • Jim Bean

      So you can un-see something !
      (Was Looking forward to something Meaty -but apparently too spammy ! )

    • Кирилл Васильев

      Holy.. Why is the internet crap like kitties and a such is online, and the really interesting stuff is getting pulled down by youtube shitty policy?!

    • Daryl Van Humbeck

      Makes me wonder who made the claim. Anywho, it’s back up now.

      • Don’t know, it was just flagged for some reason.

    • Zsola

      Ok, we saw a lot of CapXon caps in bad PSU-s and in other products, but Dave, please: it is time to do a comparison of caps. You have the equipment to take measurements, test some caps from various manufacturers, do some stress (temp?) on them, then measure again. Or do some teardown, what is the difference if any.
      I wonder why do we have to say Pana and Nippon is the best and others don’t? I think CapXon meet the specs. On the long term, it can be different, but who knows? If you use a cap in a well designed construction, it can not be a problem.
      So what is the base of we says CapXon (or others) is rubbish? It depends on the application. After a couple of years any manufacturer can be as good as the best. IMHO

      • James Damewood

        I would also like to see some experimental data showing why CapXon is a bad choice.

        • Experimental data on product lifetimes in the thousands of hours is not easy, because, well, it takes thousands of hours…

          • Zsola

            I understand that testing costs time, but the next question is: do we honest to tell any brand of cap rubbish if it is a part of a bad design? I think there is not so much difference eg. in Nichicon vs CapXcon vs. Teapo etc. if thats specs are equal?
            So we have to say: “Look, terrible design!” and not: “Look, Nichicon, it must be a perfect gear.” Judging a device by the cap. manufacturer would be misleading I think.
            I just do not understand the greatness of Nichicon and Panasonic, while we can buy from other manufacturers some good caps (spend less), and design well. I just need proof 🙂

            http://www.evanscap.com/pdf/Determination_of_Capacitor_Life_as_a_Function_of_Operating_Voltage_and_Temperature.pdf
            I wonder is there a method for thermal aging of electrolytic caps like ceramics or not.

            • The proof comes from decades and decades of being proven reliable in the industry.

      • They key is you said it yourself “long term”. Testing those things is also “long term”.

    • Jason Ji

      Nice video! Thanks!
      At the end ,you demonstrated the output signal (1GHz, 0dBm) from DSG815 with TEK MDO, there’re the 2nd harmonic and a 2.5GHz harmonic on the MDO screen, even you reduced the output power to -10dBm, the 2.5GHz signal was still there.
      I verified it by using RIGOL spectrum analyzer DSA875, the test result was that the 2nd harmonic is < -58dB (MDO shows -50.5dB), 3rd harmonic is < -69dB, there's not the 2.5GHz harmonic, suppose it could be from the the hardware of MDO. Please see my attached pictures. Anyway ,Thanks for your very useful teardown!

      • Jason Ji

        It’s the TEK MDO ADC interleave spur @2.5GHz.

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