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About steefdebruijn

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  1. 2018 PCB Group Buy with TKD pots

    I want to wait too
  2. Megatron Electrostatic Headphone Amplifier

    @mwl168 where are the heatsinks of the grhv boards? Are they inside the case or does the case do enough cooling... Beautiful build!
  3. 2018 PCB Group Buy with TKD pots

    Me too. 2mm ok.
  4. Shunt vs. linear reg

    Pars, I guess this is all too familiar for you, but for me the pages at http://www.learnabout-electronics.org/PSU/psu20.php were quite informative about the different topologies. Steef
  5. 2018 PCB Group Buy with TKD pots

    Hi can you increase my grlv from 3 to 5 and the rectifier boards from 6 to 10? Thanks Steef
  6. 2018 PCB Group Buy with TKD pots

    If they all are mentioned in the first post, I think we miss the board files for the "Unbal/Bal Tube w PSU". The PSU is there (grhv100v) but the Unbal/Bal board itself seems not.
  7. 2018 PCB Group Buy with TKD pots

    Thanks Kevin I thought so. My question really was about the GB sheet. If I opt for 1, do I get enough for a stereo set (so two bal/unbal boards and one power supply board)? or should we even use one power supply per channel (seems overkill to me) i vote megatron style btw steef
  8. 2018 PCB Group Buy with TKD pots

    Hi, Is the tube bal/unbal with power supply one stereo set? (I still want the reserved SS ones too) Steef
  9. 2018 PCB Group Buy with TKD pots

    The sws versions seem to have a tiny different mounting hole pattern. I see no other diffs but I could be missing something. I have the sws version.
  10. goldenreference low voltage power supply

    Sorry if I was not clear. I meant the rectifier boards.
  11. goldenreference low voltage power supply

    Is there a possibility to add them to the running group buy?
  12. 2018 PCB Group Buy with TKD pots

    Interested in boards for carbon (electrostatic) and balanced CFA (dynamic) builds. Already have GRHV so need several GRLV, carbon set and CFP2's. Could also use some attenuators for these.
  13. stax t8000 clone (well sorta)

    Hi how did you come to these values? As far as I understand the data sheet says typical 1.2Vf at 5mAf. With a 12V power supply (which I have on a megatron) running this through an online led resistance calculator gives a resistance of 2.2k can you enlighten me? tia steef
  14. Megatron Electrostatic Headphone Amplifier

    Ha! I knew that formula but didn't know if and how it could be put to use here :-) 3.9R gives me 166mA then. Should be enough for Megatron
  15. Megatron Electrostatic Headphone Amplifier

    Thanx @mypasswordis. I will use Kevin's suggested ones then. I have lowered the current limiter to 3.9R. Should that be enough? (how to calculate this value?) Steef