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About penmarker

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  1. penmarker

    19V Linear PSU for PC

    Does that mean you only require either u1/ic2, or they can both be fitted?
  2. penmarker

    Hifiman Jade II

    "You're not supposed to service it yourself. Leave the servicing to experienced professional personnels from Hifiman."
  3. penmarker

    Hifiman Jade II

    Sounds like planned obsolescence.
  4. penmarker

    The Multi Amp aka Dynalo Mk2

    Oh ok that's interesting. I've recently replaced the THAT in my DynaHi with a pair of 2SC3381-GR/2SA1349-GR and I noticed the gain dropped a lot. Does changing the pot value apply there too? (Sorry for being off topic)
  5. penmarker

    Sennheiser HD 660 S or HD 700

    HD700 is extremely polarizing so make sure you try them out first. I know so many people who wouldn't even want them even for free.
  6. penmarker

    2018 PCB Group Buy with TKD pots

    To those who missed the TKD group buy, I got a pot from here. https://www.ebay.com.my/itm/283057880224 A Vietnam builder referred them to me, said they are genuine, I've yet measured the channel matching. But from build quality and feel alone its really good.
  7. penmarker

    Part Sourcing Assistance/Advice Thread

    Thanks everyone. I've discussed this with some friends and we all agreed its very uncommon if they exist at all. My case already has IEC mounting hole but I'll be using external PSU. I'm planning to just cut a rectangle out of some plastic/acrylic/pcb, sand & spray, then mount from the inside.
  8. penmarker

    Part Sourcing Assistance/Advice Thread

    Does anyone know where can I get blanking plates for IEC inlet holes? I found blanking plates for XLR is pretty common but I can't find any info for IECs. Do they even exist? Attached is the blanking plate for XLR
  9. penmarker

    KG Balanced Dynahi build discussion thread

    Goddamn sorry wrong post and wrong thread.
  10. penmarker

    KGSSHV Carbon Build Thread

    Regarding GRHV, is there a drop in replacement for C2M1000170D? They're on backorder on most major sellers. **Edit Never mind guys, found out they get out of stock every few months. SCT2H12NZGC11 is also on backorder now and still don't know if FQFP8N80C is a good replacement. I guess I'll just wait.
  11. penmarker

    unbalanced/balanced to balanced tube input

    I've compiled a BOM from Digikey for the supplied GRHV based on my silkscreen from the recent group buy board. I hope others can help check if I missed anything. https://docs.google.com/spreadsheets/d/1XMu81oWk6E3mXPW6ahhEuvmhg4U497F5I5W6JPQgnNo/edit?usp=sharing You might notice there's RES 90.9K and RES 1.10K, these are because I can't find 92K resistors sold without MOQ.
  12. penmarker

    stax mafia circuit boards

    People are gonna kill themselves building it
  13. penmarker

    (closed) Dynalo Mini enclosure group buy

    That's a beauty right there. Kinda regret not getting the cases since the boards has no standoff mounting holes.
  14. penmarker

    unbalanced/balanced to balanced tube input

    The group buy is the first one, cool that means it's the correct version. I was counting the tube pinouts counter clockwise. I'll try looking for a suitable buffer stage.
  15. penmarker

    unbalanced/balanced to balanced tube input

    Gonna build this from the group buy soon, On the board the silkscreen says "tube mounts on the back side of the board" but tracing the boards shows it's the same version as the one in first post. So tubes should be mounted from the top? I also have never built tube amps so I might be wrong. some questions I have: 1. How hot is the mosfet on PSU will be? Will heatsinking with chassis floor (3mm aluminum) suffice or does it need heatsink? 2. LT1085 require heatsinks or not? 3. Will it make a good preamp? Do I need to watch/match it's output impedance to the amp's input? 4. How to bias it?