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fat joey

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Posts posted by fat joey

  7. grounded grid

    in Do It Yourself

    Posted

    11 hours ago, Laowei said:

    No, was traveling to our contract manufacturing sites in Shenzhen and Zhuhai frequently for work. Laowei (or laowai) is Pinyin Mandarin for foreigner/stranger/any non-Chinese. I'm a blue eyed, blonde haired, fat old American guy. 

     

     

    I'm fatter than you!!!

     

     

     

  11. stax t8000 clone (well sorta)

    in Do It Yourself

    Posted

    21 hours ago, kevin gilmore said:

    happy it works. now for a version with tubes as the constant current sources :D

    And a cherub has just informed me a t8000 is headed my way

    I like retirement. going to a hamfest tomorrow to see what I can find to update some of my very antique test gear

     

     

     

     

    hamfisting the T80000, yoohoo!!!!

     

     

     

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  12. Mr Speakers Electrostatic Ether E

    in Headphones

    Posted

    On Wednesday, May 10, 2017 at 9:02 PM, mattyice said:

    I got in some time with Ether Stat before the room got loud. First of all, I prefer the 007 to the 009 if that helps understand my preferences. The 007 and ES were actually somewhat similar. I preferred the ES for two reasons.

    1. The sound stage width and depth was considerable better on ES. I was somewhat surprised at this. Possibly because I listened before the room got loud I was able to observe this difference more so. Once the room got noisy the cavernous sound stage of the ES seemed to get drowned out. 

    2. I prefer the mids on ES, especially on the BH that Justin brought. I mostly listen to vocal centric music, jazz and modern folk/Americana. I was hearing voices that were more naturally rendered with lot's of detail. Breathing between notes, chesty guttural notes from deep in the chest. 

    I still love the 007 and it remains my favorite production stat. I'm hoping that it can be improved on with something modern and at a friendly price point.  

     

     

    how much are these? want to buy a pair

  13. stax t8000 clone (well sorta)

    in Do It Yourself

    Posted

    On Friday, May 12, 2017 at 11:09 PM, kevin gilmore said:

    Well its not like the stax mafia aren't busy

    and we certainly are not going to do an output stage with 8ma of current, and therefore no reason for a 4 stage amp, and since tube inputs seem to be the big thing lately, well might as well take the kgsshv-carbon design and replace the input fet with an input triode. bonus, no low voltage supplies.  not a bonus, ksa1156 and ksc5026 run at close to 1 watt each.

    I should have a real t8000 end of june, but this should keep some of you busy. I expect joamat to have one built in less than 24 hours.

    no, no circuit board yet

    about 70 volts on the plate of the tube, same as t2.

    optical servo from kgsshv-carbon will work fine (but then you need the low voltage supplies)

     

    kgsshvcarbontubeinput.PDF

     

     

     

     

     

    you got the T80000 yet, bro? God bless USPS!!!

     

     

     

     

     

     

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  17. HC Bike/Cycling Thread

    in Miscellaneous

    Posted

    I know why I'm getting older and older, but I don't know why I'm fatter and fatter. I'm already 250 lb, and my height is 1.67m.

    I want to buy a bicycle, do I need a big one? How big do I need? Should I wear something to protect my head? It's bold, and smooth, I think it helps the air flowing during high speed. But I doubt I could make the bike running at that kinds of speed.

  19. NYC Meet Feb 4-5 2017

    in Meets

    Posted

    44 minutes ago, mypasswordis said:

    I forgot to add. The AP guy said I can give him a list of all the headphones I want measurements of, and whatever he has he will send to me. Anyone desperately want something in particular? I currently have HE1000 v2, LCD-4, Utopia, and my 2 vintage headphones. When we were there we asked Fang for the Edition 6 to measure but he said all the units he brought to the show were prototypes, so that's not an option. 

    How about HE1000 V1 vs V2? oh and Sony MDR-Z1R. Inform him to test THD+N, not THD. The rest is not needed. MR. Tyll Hertsens has tested with his own AP unit.

    HE1000 V1 vs V2 must measure under the same condition

  20. DHT fully dc coupled amp (with 8 EML tubes)

    in Do It Yourself

    Posted

    In Netherland there's not much people interested in headphones, but thank god, I've found three persons in my building and I successfully persuaded them to build the 8 EML tubes fully dc coupled DHT amp. They're speaker guys, anyway since their children are too young and the wives want to keep the family quiet, they agreed to try headphones.

    We will do it toghter, one person alone couldn't afford it.


    We want to build it, yes, 120% sure

  21. grounded grid

    in Do It Yourself

    Posted

    @JoaMat Is it possible to use GGDHT as the dirver board plus the nanotube output board?

     

    @kevin gilmore I've read that solid state amps including solid state electrostatics amps has their lowest distortion only at about 80% of their max output level (THD+N vs power level graph)

    but when we turn the volume to let them achieve 80% of max output level our ears are already bleeding

    Does that mean GGDHT running at 20ma has lower distortion than KGSSHV Carbon running at 20ma at normal listening level (ie. small level)?

  23. and now for something completely different part 3

    in Do It Yourself

    Posted

    In order to achieve 100w pure class a (or even 120w or 150w class a, these require higher voltage than +/-40v, maybe 50/60/70, well 70 is too much)

    how many of the bias current should we set, is 70ma ok?

    +/-40v could maximally provides 100w class a, stereo balanced needs 18 pairs of output transistors per channel, and 100w needs 2.5A current at least, 2500/36 = 69.4ma per transistor

  24. goldenreference low voltage power supply

    in Do It Yourself

    Posted

    Trying to power up a laptop, a bit silly though. laptops always using SMPS

    Any plan to release a active crossover board (analog active), three-way, or four way, with discrete stuff? For diyers who are messing with diy speakers, that would be a great news.

    Many active crossover boards on the Internet sounds like ****, contain tons of op amps, disappointed

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