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cspirou

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About cspirou

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  1. cspirou

    The Multi Amp aka Dynalo Mk2

    My mistake. I just focused on the red text saying "Please note long lead time"
  2. cspirou

    The Multi Amp aka Dynalo Mk2

    Updating my BOM for the Dynalo Mini. MMBTA56/06 looks to be discontinued. As a substitute Mouser is recommending MMBTA56L/06L. Is there any reason I shouldn't use this substitute for the Dynalo Mini? The datasheets seems to match on most specs and the graphs differ a little bit EDIT: Oh god 32 week lead time! Fuck that!
  3. cspirou

    Linkwitz Labs LX Mini

    BTW, even though Linkwitz has passed away you can still do this through his wife
  4. cspirou

    Linkwitz Labs LX Mini

    ASP is now available at the diyaudio store. Designed so you don't have to use exotic jfets. The entire kit with enclosure is $300.
  5. cspirou

    The Multi Amp aka Dynalo Mk2

    @MASantos i need to order some parts for myself soon. I can add the MMBTA56 transistors to my order
  6. cspirou

    The Multi Amp aka Dynalo Mk2

    I haven't built a 2oz board yet. Just comparing the reported temp of @Whitigir vs what I have, which is closer to 70C max. I'm sure building the 2oz board is much easier. Although the 3oz board wasn't so bad after I got a soldering strategy down. Plus I have a DIY reflow oven which helps with a lot of components.
  7. cspirou

    The Multi Amp aka Dynalo Mk2

    The heatsinks attach to the plastic casing which I presume isn't a great heat conductor. Not too surprising. Doug is using a heatbar attached to the PCB for his T4 amp, which is a pretty clever solution. Also wondering if this is why my amp with the 3oz board has a lower temp. More copper to dissipate heat.
  8. cspirou

    The Multi Amp aka Dynalo Mk2

    I think i share this observation as well. Heatsink temp is lower then the naked transistor for sure, but i am not so sure that the transistor itself is actually that much cooler. The vented PCBs like Headamp has on their newer amps would be the way to go, or some sort of PCB mounted heatsink like this.
  9. cspirou

    The Multi Amp aka Dynalo Mk2

    @Whitigir - Did you drill another hole?
  10. cspirou

    The Multi Amp aka Dynalo Mk2

    That is one blinding LED. Nice work! Where did you get the heatsinks for the THAT chips? For knobs I was going to go with diyaudio or Parts Connexion
  11. cspirou

    KGSSHV Carbon Build Thread

    That sounds way overpriced. You can get a KGSSHV from Mjolnir Audio for far less. Most people here use modushop or diyaudio store and get the panels CNC'd with modushop or use Front Panel Express. It's not super cheap, but won't be anything close to $15,000. There's also a bunch of vendors in China that do a pretty good job, but I don't know how to navigate that area.
  12. cspirou

    The Multi Amp aka Dynalo Mk2

    The jumpers don't transmit any significant current, they just are used to set the voltage. So silver solder is definitely overkill.
  13. cspirou

    The Multi Amp aka Dynalo Mk2

    My main concern with battery isn't so much noise but the varying voltage as power draws down. Usually this means some sort of power management circuit in between the batteries and the amp which can have their own noise. Also with a bipolar power supply there's an issue of one rail powering down before the other, leading to a large DC offset. I'm sure Sony has a very competent implementation though.
  14. cspirou

    The Multi Amp aka Dynalo Mk2

    What is the preferred potentiometer value if I go with 2sk170/2sj74 jfets instead of the THAT chips? Still 10k?
  15. cspirou

    2018 PCB Group Buy with TKD pots

    I think there's a another version of the SMD diamond buffer used for the ubal -> bal boards with a servo.
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