atomicbob
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Jan 19, 2018 at 8:22 PM
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atomicbob

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Happy to see so many find the FFT visual tutorial worth their time to peruse. Please let me know of any errors or improvements to be made. Jan 19, 2018 at 9:20 AM

atomicbob was last seen:
Jan 19, 2018 at 8:22 PM
    1. atomicbob
      atomicbob
      Happy to see so many find the FFT visual tutorial worth their time to peruse. Please let me know of any errors or improvements to be made.
      1. Lyer25, A1Gear, yotacowboy and 2 others like this.
    2. atomicbob
      atomicbob
      Yeehaw! It feels so good when it quits hurting. Episode over. Back to being a NC again.
      1. Luckbad
        Luckbad
        I need more like buttons than are available.
        Jan 18, 2018 at 7:43 PM
        GoodEnoughGear likes this.
      2. atomicbob
        atomicbob
        Thank-you all. Today is starting out well. As Cyrille Aimee sings, "It's a Good Day".
        Jan 19, 2018 at 9:17 AM
        Luckbad likes this.
    3. atomicbob
      atomicbob
      sometimes I feel guilty ... then again sometimes I selfishly just enjoy the music ...
      1. View previous comments...
      2. Melvillian
        Melvillian
        Nothing selfish about it. You already do more than 90% of us combined.

        Right channel on my crack hasn’t been working for a while. I really miss listening to it. Will have to spend the time and figure out what’s going on with it
        Jan 15, 2018 at 7:52 PM
      3. atomicbob
        atomicbob
        Thank-you all. I was a little down after recently sustaining a 76 hr afib episode. The "selfish" part is partly tongue-in-cheek. Enjoying the music should remain top priority for everyone. I check out the what are you listening to now thread regularly and have been adding new music at an unprecedented rate, well for me anyway.

        @Melvillian - fix that Crack. You will be glad you did.
        Jan 16, 2018 at 8:41 AM
        Dino likes this.
      4. Melvillian
        Melvillian
        I really do need to fix it. I think I’ll start with rewiring the amp. It’s a complete mess from all the mods I’ve bolted on. Probably good to revert the amp back to its simple form and see what happens.
        Jan 16, 2018 at 3:09 PM
        atomicbob likes this.
    4. atomicbob
      atomicbob
      Beginning 2018 feeling Thick as a Brick. CRS interfering with what measurements have / haven't been made or posted. Back to Tull for awhile.
      1. Ringingears likes this.
      2. Dino
        Dino
        Make sure to listen to every song in the correct order. :)
        Jan 3, 2018
        Ringingears and atomicbob like this.
    5. atomicbob
    6. atomicbob
      atomicbob
      Data quality vetting done. Putting together outline now. There will be additional graphs given some interesting attributes of the ZDT Jr.
      1. obsiCO, jexby, Dr. Higgs and 6 others like this.
      2. Ringingears
        Ringingears
        Thanks for doing the measurements. Really curious to see what you found.
        Dec 17, 2017
    7. atomicbob
      atomicbob
      Shit! that feeling you get when realizing an afternoon of measurements have been shot to hell ....
      1. atomicbob
        atomicbob
        because the 30R measurements were made with the plug in the High impedance jack. Will have to redo all those measurements after dinner.
        Dec 16, 2017
      2. jowls
        jowls
        Ugh. I can’t imagine the amount of time it takes for such comprehensive measurements, as you consistently provide. Thanks again.
        Dec 16, 2017
      3. atomicbob
        atomicbob
        Data quality vetting done. Putting together the outline now. There will be additional graphs given some interesting attributes of the ZDT Jr.
        Dec 17, 2017
        jowls likes this.
    8. atomicbob
      atomicbob
      ZDT Jr 300R measurements in the can today. Tomorrow will be 30R measurements and pictures. Maybe some data posted on Sunday.
      1. Gaspasser, Vansen and dmckean44 like this.
    9. atomicbob
      atomicbob
      So here I have some very expensive and great sounding headphone amps, but what am I drawn to this evening?
      1. View previous comments...
      2. FlySweep
        FlySweep
        Big BIG fan of the SB'ed Crack w/ the Tungsram E80CC. I wish I heard one that was specifically biased for that tube.. cause even non-optimized for it, it was terrific. Amperex 5085 is indeed dope.. might still have it in my tube stash.. will send it to you @atomicbob if I find it. Tungsram's 12AU7 is a fav in the Crack for me, as well.
        Dec 2, 2017
        atomicbob likes this.
      3. Melvillian
        Melvillian
        Dec 3, 2017
        FlySweep likes this.
      4. atomicbob
        atomicbob
        @FlySweep - I replaced the bias resistors with a 10 turn precision resistors. Must be careful about initial setting but with a DMM it is easy to rebias appropriately. Can get exact voltages desired this way. Probably better to have a small series resistor with the precision resistor to set an absolute minimum resistance and thus maximum current to avoid letting out the magic smoke.
        Dec 4, 2017
        FlySweep likes this.
    10. atomicbob
      atomicbob
      One measurement post partially complete. 5 or 6 to go over the next several weeks (hopefully.) So far behind.
      1. zonto, Dino, jexby and 6 others like this.
      2. jowls
        jowls
        Great to see you back Bob. I hope your health is on the improve...
        Nov 28, 2017
      3. atomicbob
        atomicbob
        Thank-you, overall better but still have cardiac episodes. They are shorter in duration when they occur for now.
        Nov 29, 2017
        Dino and jowls like this.
    11. atomicbob
      atomicbob
      Five days of family Thanksgiving events. Both enjoyable and exhausting.
      1. Dino, Wilson, Cellist88 and 1 other person like this.
      2. Cellist88
        Cellist88
        Now after a short break, you gotta worry about christmas!
        Nov 26, 2017
        atomicbob likes this.
      3. atomicbob
        atomicbob
        Nov 28, 2017
        Cellist88 likes this.
    12. atomicbob
      atomicbob
      I am disgustipated ... set aside time for measurements and posting on a Sunday afternoon only to discover the kitchen faucet leaking ...
      1. Thad E Ginathom likes this.
      2. View previous comments...
      3. bengo
        bengo
        The neighbour helped me find the leak and fix it! Any mistake which doesn't kill you is an opportunity for learning. :) So now I know what a "Jubilee clip" is and why the washing machine hose should have one...
        Nov 20, 2017
        atomicbob and Thad E Ginathom like this.
      4. atomicbob
        atomicbob
        LadyLux3 was a PITA to uninstall and consumed a couple of hours. Several major components had siezed. Moen install was approx. 45 min. Kitchen functional again, wife happy. Thanksgiving back on track.
        Nov 22, 2017
        Thad E Ginathom likes this.
      5. Thad E Ginathom
        Thad E Ginathom
        The one quarter-turn mixer tap (faucet. That word puzzled me for years) that has never even dripped, let alone caused us any other problem, is the cheapest, non-branded, one that we have. When we asked about service, the guy who sold it to us said, "Throw it away and buy a new one." And this is a kitchen tap so it gets heavy use.
        Nov 22, 2017
        atomicbob likes this.
    13. atomicbob
      atomicbob
      I'm in for a ZDT Jr. Hoping it will deliver substantially similar auditory delight to my Zana Deux SE in a more transportable format.
      1. Aleatorius, Merrick, Wilson and 5 others like this.
      2. Ringingears
        Ringingears
        I’m in too. Just now. Hoping it will give me the ZD sound without all the heat.
        Nov 18, 2017
        atomicbob and Wilson like this.
    14. atomicbob
      atomicbob
      Have a lot of catching up; lots of data in the can. Hope to improve the SNR a bit.
      1. Dino, Serious, Neal and 19 others like this.
    15. atomicbob
      atomicbob
      Recovering from this season's first round of rhinovirus / crud. Wife is worse than me with her asthma. Several measurement posts pending.
      1. View previous comments...
      2. bixby
        bixby
        Mushroom soup for vitamin d, speedy recovery!
        Oct 18, 2017
        atomicbob and GoodEnoughGear like this.
      3. Dino
        Dino
        I hope you and your wife feel better soon. Measurement posts and etc can wait.
        Oct 18, 2017
        atomicbob and Elnrik like this.
      4. atomicbob
        atomicbob
        Now undergoing the second round of rhinovirus / crud. This time I have it worse than my wife, thankfully. Respiratory ailments are quite challenging for asthmatics.
        Nov 15, 2017
    16. atomicbob
      atomicbob
      Wow, take a few days away from the forum for corporate work and some measurements and look what happens ...
      1. atomicbob
        atomicbob
        It appears several inDUHviduals arrived, kicked over the buffet table, took a shit in the punch bowl, pissed off a lot of folks and generally decreased the S/N ratio.

        They would never dare do that in real life, say upon entering a biker bar. After the thrashing they'd find themselves stuffed in the garbage out back.
        Oct 10, 2017
        Luckbad, FlySweep, jowls and 9 others like this.
    17. atomicbob
      atomicbob
      Coincidence? I've had two SMPS wall warts malfunction within the last 24 hrs. Both were being used normally, not subject to experiments.
      1. ultrabike likes this.
      2. View previous comments...
      3. Elnrik
        Elnrik
        They were jealous of the Meanwell + Noise Nuke and committed suicide.
        Sep 29, 2017
        atomicbob likes this.
      4. Thad E Ginathom
        Thad E Ginathom
        Revenge of the wall warts!
        Sep 30, 2017
        atomicbob likes this.
      5. atomicbob
        atomicbob
        Revenge of the Wall Warts - I like it. Could be a song or even a movie along the lines of Attack of the Killer Tomatoes.
        Sep 30, 2017
    18. atomicbob
    19. atomicbob
      atomicbob
      42 also appears to be the low quantity parts cost (in USD) for the power supply LC filter I am currently testing.
      1. Cryptowolf and Luckbad like this.
      2. schiit
        schiit
        Wow, that's a serious filter. BIG choke?
        Sep 25, 2017
        atomicbob likes this.
      3. atomicbob
        atomicbob
        Hammond 155B - 6mH 2A and two 6800uF 63V Nichicon electrolytics. The CU-234 box was $10 and connectors add another $5 in unit quantities. It all adds up quick.
        Sep 25, 2017
        schiit likes this.
      4. atomicbob
        atomicbob
        Data on PS + LC measured effect on amps coming soon.
        Sep 25, 2017
        Luckbad likes this.
    20. Wilson
      Wilson
      Pointer Sisters and Monty Python referenced in the same thread - well done!
      1. atomicbob likes this.
      2. atomicbob
        atomicbob
        There are a few more subtle pop references in the measurement post as well.
        Sep 25, 2017
        Wilson likes this.
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    Gender:
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    Occupation:
    acoustic research scientist

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    Organizing chaos for over six decades.