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s_r

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Everything posted by s_r

  1. s_r
    I'd be in for 20x 680uF/550V caps if you're going to order 100+. Right now those 20 caps take up a large sum of cash on my mouser cart.
  2. s_r
    Was answered I believe Kerry also mentioned to use AC325 for 400V output and AC360 for 450V output.
  3. s_r
    The data sheet off mouser for the kemets I have selected say it's 2 lead (since A is the termination code right after ALC10).
  4. s_r
    How about mounting the driver/output boards vertically & the PSU boards horizontally? Should put less stress on the caps & leave enough space for toroids on the bottom plate (this is assuming 500mm depth). I can include a rudimentary sketch if needed.
  5. s_r
    Already edited my first post, but I'll take all v3 amp boards.
  6. s_r
    I'd certainly be interested in the circlotron boards.
  7. s_r
    Is there much benefit in going with 680uF caps over 470uF ones in the PSU? The kemet 680uF ones are too tall to fit in a 2U case. Not sure if I want to go with the shorter caps or just cut holes in the top cover.
  8. s_r
    What should the forward voltage on the LEDs be? 2.1V? Also earlier I meant how the current for the amp is calculated, not the PSU. For example, what resistance at the current adjust would yield 20mA per leg?
  9. s_r
    How about using the fat version of the split PSU (kgsshvpssicfetsinglenewrightfat.zip and kgsshvpssicfetsinglenewleftfat.zip)? I'd change my interest to these over the dual PSU board if they're used.
  10. s_r
    I'm in for 5 sets (10x amp v3 boards, 5x fat left PSU, 5x fat right PSU).
  11. s_r
    Any problem with using these two for the higher wattage resistors on the PSU? Also, how exactly is the output current for the amp boards calculated?
  12. s_r
    Pretty certain he means the two 390kOhm resistors. For 450V you'd sub in two 440kOhm (or any two that add up to 880k).
  13. s_r
    Thanks kevin. Would 500V caps work for 450V operation or should 550V ones go in anyway?
  14. s_r
    For the SiC PSU, what's the voltage value for the 47uf caps near the top? Since the old zener string is gone, how exactly is the output voltage (400V vs 450V) determined?
  15. s_r
    Where did you see 680uf/550V caps for $32 kevin? Could only find this kemet cap on mouser.
  16. s_r
    So when will boards be available?
  17. s_r

    kgst

    s_r replied to kevin gilmore's topic in Do It Yourself

    Yep, they do.
  18. s_r
    They're available on mouser last I checked.
  19. s_r
    What type of foam did you use? Just a few mm thick I assume? What about that wool mod on the other site? I'm almost tempted to get new earpads to try these out.
  20. s_r
    My 009s are from december of 2013, not sure if that counts as a 'new pair'. Probably doesn't matter but the serial is SZ9-2295. Either way I don't find them bright at all. Anyway, mind sharing the details of the foam mod you've done?
  21. s_r
    Depending on price I may want more than one set.
  22. s_r
    Thanks Kerry. Figured I may as well show my progress with the build: Still missing a number of xicons (as per the ad I posted) though. Unless someone has a chunk of them they're willing to spare I might pick up carbon takmans instead. Maybe just for the batteries in case vishays are fine outside of there.
  23. s_r
    You mean the STN9360? Pretty sure that's always been an option on the kgst boards.
  24. s_r
    Alright, I happen to have four which measure right on 65, so I'll use those in the batteries. I take it the hfe outside of the battery is less critical then?
  25. s_r
    Is it more important for the 3675's in the batteries to have matching hfe's, or for that hfe to be of higher value? Aside from three 3675's (which are 41x2 and 46) the rest of mine have a hfe between 50-70.
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