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    EEVblog #1040 – Caesium Beam Frequency Standards

    A look at the Caesium beam time and frequency standards at the Keysight standards lab ...

    • Cool vblog, in addition to the depanting of Rigol and Chineese crap I really enjoy the war stories, so please keep it up.

      If you want negative feedback then there are two tiny sticky points for me:
      * Keep the frequency of “ya know” down to less than 0.1 Hz.

      * DRY; Don’t repeat yourself, this has been much improved lately, but it really got on my tits for the first bunch of installments.

      Fix those two and I’ll be even more happy about watching.

      … oh and Rigol should *so* sponsor you, when my tek dies I’ll be getting one of those scopes:)

    • I like your “think for your self” style. Paul Rako happens to be of this point of view too. We should not be taking each-others “word for it.” We should all be sharing what we find and make allowances for the fact we are all human. You are not an “authorative engineer “, but rather an “explorative engineer” like both Paul and me.

    • Eldon Brown


      Good going!

      I love the fresh approach and like your “talking across the bench discussion style”. I am always looking forward to the next.


      • Reuben Smith

        I really enjoy all of these blogs. I have an associates degree from ITT 1994, but have been a hobbyist since age 10. My dream is to have a tech school better than ITT combined with a resale outlet where the students help me with repairs. I have a commodore 64 setup at home which I know intimately hardware and software as well as a work bench similar to Dave’s. Love it. iwoz and the Art of Electronics is among my huge collection.

    • I’ll keep it to the point:
      – Its good to hear stories of experience
      – The ‘try it for yourself’ style of science is the best way, not only because of peer review, but also but because people learn for themselves. (As a student myself right now, exploring, learning, making mistakes, and having to think for yourself is the only way of really learning).
      – It might be interesting to talk about [personal] projects on top of commentary, show off your stuff because I’m sure your viewers are interested in whats going on. Of course you may be bound by NDA’s or other legal pains if you reveal your workplace, your professional projects, but your own tinkering should show up every so often.

      Keep it up though, people are always interested in reading about new cool things happening. Keep it short, sweet, and to the point because people on the internet are generally impatient.

      Also keep up the requests for comments, because it really does encourage people to voice opinions that would otherwise not be posted.

    • Kathy Quinlan

      Hi Dave,

      Keep up the good work, I love the stye.

      On the subject of thinking for ourselves, I think (as you pointed out in a previous blog)failure is the best form of learning.

      I guess it takes a fellow Aussie to fully apreciate the way you present 😉

      I think we should all learn from our mistakes, but also learn from the mistakes of others, as they are just as informative. I particularly like the idea of forums, as a place of learning from others mistakes. Someone may popup with an answer that makes you question your thoughts and gets you thinkig.


    • Norbert Sch

      Hi Dave,
      I really enjoy watching your videos even though I know hardly anything about electronic engineering. I start studying physics this year in October so the oscilloscope phenomenon was especially interesting ;).

      Greetings from Germany,

    • Dave,

      A suggestion: how about a post or two on some of the gotchas in ordinary components?

      I’m thinking about stuff like:

      piezoelectric SMT ceramic capacitors,

      horrible 1/f noise in thick film resistors,

      surface leakage due to flux residue under SMTs,

      Offset voltage weirdness in RRIO op amps,

      charge pumps turning up in weird places (e.g. the 500 kHz ones in some Intersil dpots),

      and instability in LDO regulators.

      Some more chip-of-the-week features would be nice too. I suggest the AD5432 fast MDAC–it lets you use +-10V references while running off +5 and ground, and it has about 10x the multiplying bandwidth of most others. Great part.

      Keep up the good work.


      Phil Hobbs

      • Thanks for the suggestions Phil. So many ideas, so few blogs!

    • May I suggest ditching youtube.com for http://www.vimeo.com hi-def video, and no length restriction if say you need 11 or 12 minutes instead of 10.

      And maybe purchase eevblog.com ill throw in a donation if you need help.

      • I am considering other video hosts, but it won’t be at the expense of YouTube. YouTube is still the #1 player so I simply have to maintain a presence there. A good number of my viewers subscribe via YouTube.

    • Thomas

      I think you’re doing a great job. Your personal, food for thought style really works. I stumbled on this blog a few days ago, and I just couldn’t stop watching! I’ve learned something new in each video, and they definitely give me something to think about.

      The length of the videos is also pretty good. Too short and it’s over too soon, but too long and you lose the audience. Although since I just 5 in a row, length might not be an issue!

    • Eric Haskett


      I like the suggestion Phil Hobbs made (above).



    • I sent the sites web url to hackaday.com maybe they will pick you up in an article. I forgot to mention your doing a good job Dave.

    • Darrin

      I have a couple of things:

      – I wouldn’t trim the length any. Modern life with all of our gadgets and the internet has conditioned us to quickly jump from one thing to the next at the expense of critical thinking. I would prefer it if you take the full amount of time to explain your point. It reinforces the information in the viewer’s mind and there’s probably some other valuable information buried in there that will be helpful in the future.

      – I wouldn’t go to vimeo. Their flash player isn’t quite as robust as youtube’s and doesn’t work with as many different computing platforms.

      Otherwise, I do find the blog very informative. Keep up the good work.

    • Lucassiglo21

      i have an idea to talk about: you can talk about different signal buses(like spi, i2c, 1-wire, uart, etc)their differences, needs, advantages and disvantages of each one.

    • Hackaday picked you up. http://www.hackaday.com

      • Thanks for the heads-up.
        I was wondering where all the extra subscribers flooded from overnight!

    • Frank

      You mentioned that you “wish you could go back and reshoot”. There’s no need, and there’s a nice little workaround that YouTube offers now – Annotations. Just put a little text tag right on top of your video, at the right moment, to point viewers to corrections (“Oops – I corrected this statement in #12.”), links, or expansions of your points.

      I personally think you should annotate a link to http://www.alternatezone.com/eevblog into each video, so all the viewers can discuss in one place.

      Don’t forget you can always edit your video description to include pointers to updates.

      Finally, as for “taking too long to get to the point”, just edit more extremely: ruthlessly snip out every gap, filler, “and”, “uh”, “you know”, breath, and repetition. The effect is intense, compelling and funny at the same time. Plus you can squeeze in 2 more minutes of solid material, too.

      • I’d love to ruthlessly edit out every “you know”, “umm” and gap etc, but that takes a massive amount of time. It can make the editing process many times longer.
        Perhaps there is a better editor than my VideoStudio program to do this, but it would still be very time consuming none the less I think.

        I’ve been debating whether or not to use the YouTube annotation feature. It helps those who watch via YouTube, but doesn’t help those who podcast the program or watch with some other program (usually around half my audience).

    • Juan Ignacio Cogliatti

      Dave, Excelent Videoblog… I found it very fun and helpfull… good work and Go On…

    • Decided to watch the back catalogue rather than jump in at the deep end.
      Great episode, echoing one of my favourite motos Nullius in verba – take no ones word.

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