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Thread: SIT amp project

  1. #1
    Wammer
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    SIT amp project

    Gonna give this project a go
    http://www.diyaudio.com/forums/diyau...-part-1-a.html

    2SK82's ordered KD33 variant.

  2. #2
    Price Discovery Bitch i_should_coco's Avatar
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    Good luck! Will be watching closely.

    BTW, you can get 2SK79 small signal VFETs on ebay, too.
    CD players - computer audio for dummies.

  3. #3
    Wammer
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    Cheers Pete
    Just sticking to the fig11 cct at the mo,some nice bulbs hopefully coming from across the pond
    Last edited by RobsterD; 16-01-2012 at 06:58 PM.

  4. #4
    Wammer
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    couple of funky heatsinks ordered 200mm length.
    The 2SK82's dissipate around 45watts, their thermal resistance is around 0.5C/W
    http://www.birminghamaluminium.com/
    bias cct will be the generic version
    Bulbs are here
    http://www.elightbulbs.com/Sylvania-...S30-Light-Bulb
    Last edited by RobsterD; 06-05-2012 at 11:58 PM.

  5. #5
    Wammer
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    Interesting article on mounting TO3 packages
    http://www.ti.com/lit/an/sboa020/sboa020.pdf

  6. #6
    Wammer
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    can you put some resistors instead of bulbs or there's some specific reason why they are there?
    Horn OK Please!

  7. #7
    Price Discovery Bitch i_should_coco's Avatar
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    Quote Originally Posted by anubisgrau View Post
    can you put some resistors instead of bulbs or there's some specific reason why they are there?
    Sure, the only reason(s) to use lightbubs is because they look nice. And they have essentially a built in heatsink.
    CD players - computer audio for dummies.

  8. #8
    In the trade Wammer pure sound's Avatar
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    What variety of o/p coupling cap do you intend using?

  9. #9
    Price Discovery Bitch i_should_coco's Avatar
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    I plan to build one of these with an output transformer and a decent choke input supply/shunt reg.

    Eventually.
    CD players - computer audio for dummies.

  10. #10
    In the trade Wammer pure sound's Avatar
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    & a sit input stage?

  11. #11
    Price Discovery Bitch i_should_coco's Avatar
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    CD players - computer audio for dummies.

  12. #12
    Wammer
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    Quote Originally Posted by pure sound View Post
    What variety of o/p coupling cap do you intend using?
    Not got to the stage of ordering components yet,any advice from you pro's appreciated !

  13. #13
    Wammer
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    Some rather large heat sinks arrived today

  14. #14
    Leper Wammer AmDismal's Avatar
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    Cool!
    Compression drivers twerk my eardrums

  15. #15
    Wammer
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    all the bits now ordered,some nice transformers coming from Canterbury Windings and some trendy bulbs and big caps coming from across the pond courtesy of a crazy Wammer clue he hobbles at the mo hope its getting better !
    Last edited by RobsterD; 08-02-2012 at 09:54 PM.

  16. #16
    Cock with Aspergers ncdrawl's Avatar
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    good luck brother.

    that crazy crippled bastard sounds like a real champ!
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  17. #17
    Wammer
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    2SK82'S mounted and bias cct done.

  18. #18
    Wammer sonichit's Avatar
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    don't go scratching them speakers rob
    [/QUOTE]

  19. #19
    Wammer
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    ha ha no probs, no scratches,honest !
    the IMF's now have a pair of HF2000's,seemed to be easier to get than 8ohm HF1300's they are like rocking horse....
    Speakers now mounted on some M6 spikes instead of those funny feet.
    Sounding very nice

  20. #20
    Wammer sonichit's Avatar
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    that's great news rob your find them elusive 8ohm soon,
    still not got the amps done yet when i do I'll let you know, good luck with your project very interesting
    Last edited by sonichit; 24-02-2012 at 10:55 PM.

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