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MASantos

High Rollers
  • Content Count

    527
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Community Reputation

25 Excellent

About MASantos

  • Rank
    High Roller
  • Birthday 05/02/1985

Profile Information

  • Gender
    Male
  • Location
    Lisbon, Portugal

Converted

  • Location
    Lisbon, Portugal
  • Interests
    Surfing, Woodworking, Cooking
  • Occupation
    Air Traffic Controler
  • Hobbies
    Surfing, DIY audio, Music,
  • Headphones
    HD 6XX , Shure E4C, Koss KSC75
  • Headphone Amps
    RevMillett Hibrid,
  • Sources
    Rega P5, goldring 1042, Salas Folded Phono, Bluesound node 2
  • Other Audio Gear
    DIY first watt f4, DIY first watt BA3, Rega RS3 speakers

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  1. MASantos

    The Multi Amp aka Dynalo Mk2

    I fired up the mini this morning, no smoke or fireworks which is always great! I left it for half an hour to warm up with the case closed and measured the temperature over the transistors with an IR thermometer. I got temperatures between 90-100 celcius, which is very hot. This seems to be quite hot, much higher than what other members reported. Is this safe or should I look into reducing bias? I don't mind the heat, but don't want to have to replace transistors anytime soon.
  2. MASantos

    The Headcase Stax thread

    I was mentioning the rega speakers story. I'll tell you another: I bought a lyngdorf audio amp and speakers about one year ago at the portuguese dealer, who gave me a 15% discount on a brand that has a fixed price list. the prices online are all the same everywhere, so I got a very nice deal. There are good dealers and bad ones everywhere!
  3. MASantos

    The Headcase Stax thread

    Well it isn't fair for a dealer to spend money having a store, stocking products and employing people, having you go there to listen and choose products, and then go buy somewhere else. If one wants to do that then they should order the product from the shop with the great price and return it if they don't like it and the shop allows. One shouldn't have a cake and eat it too in this situation. I can't understand how supersonido gets away with some of the prices they practice, most brands have some sort of price list that dealers should abide.
  4. MASantos

    The Multi Amp aka Dynalo Mk2

    Guys, a question for those who used AMB's o78/79 regulators. Do I need to isolate the PCB from the heatsinks?
  5. MASantos

    The Multi Amp aka Dynalo Mk2

    @cspirou Arrow has free international shipping, so I just ordered from them. Thanks for you help anyway!
  6. MASantos

    The Multi Amp aka Dynalo Mk2

    thanks, that would be great. I'll send you a pm later today.
  7. MASantos

    The Multi Amp aka Dynalo Mk2

    It seems I have forgotten to order the MMBTA56 SOT 23 transistors. Does anyone have 6 of these by any chance that they would be willing to sell me? Ordering from mouser will cost me an arm and a leg in shipping and customs for 1 dollar worth of parts.
  8. MASantos

    The Multi Amp aka Dynalo Mk2

    They should all point to the same side indeed, but I for some reason I can't understand I soldered them this way... 🙄 Regarding the 0ohm jumpers, I didn't understand I should only install them after testing the amp, I'll remove them tomorrow as well then.
  9. MASantos

    The Multi Amp aka Dynalo Mk2

    Underside of the dynalo mini done, just need to clean the flux residue when it's all done. Those 0805 resistors are starting to be the smaller I can solder without magnifying glasses. I just noticed looking at the picture that the tantalum capacitors don't have the positive to the same side of the board. I must hsve confused this somehow and will take care of it in the morning.
  10. MASantos

    The Multi Amp aka Dynalo Mk2

    I'm starting building my dynalo mini next monday, I tryed to find info regarding DC offset adjustment, and how to adjust each pot, but couldn't find any info.
  11. MASantos

    The Multi Amp aka Dynalo Mk2

    There is space inside for one of those ultra quiet computer fans. With a reduced voltage removing a bit of air from inside the box might help.
  12. MASantos

    The Multi Amp aka Dynalo Mk2

    Have you measured the top.of the transistors without the sinks?
  13. MASantos

    The Multi Amp aka Dynalo Mk2

    Regarding the output transistors heatsinks, what size should I look for?
  14. MASantos

    The Multi Amp aka Dynalo Mk2

    Parts ordered for a mini dynalo, should be here in a couple of weeks.
  15. MASantos

    2018 PCB Group Buy with TKD pots

    Finally got my boards through customs. Great packing Steve, thanks and the quality is awesome!
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