Search results for query: Patrick

  1. EUVL

    JLH Class A headphone amplifier

    Have you tried ADA4627 ? Patrick
  2. tamra

    F5 power amplifier

    Thank you so much Patrick!
  3. EUVL

    All Hitachi Lateral FET amplifier for DIY described by Paul Kemble

    If you would follow my previous projects, you would know that I almost never use trimpots. The one in the photo is only for setup. Once it is finally installed in the final heatsink case, the trimpot will be replaced with fixed resistors, as I always do. The PCB is designed to take both. Patrick
  4. EUVL

    Very Simple, Almost Universal, Speaker Protection Circuit

    That depends on whether +/-50V, or 50V single rail. Also depends on single ended (And referenced) output, or BTL. The comments in post #23 refers to the protection circuit of course. Not to the amplifier. Patrick
  5. EUVL

    Very Simple, Almost Universal, Speaker Protection Circuit

    Of course. Prototypes soldered, ready for testing this weekend after business trip. Patrick
  6. P

    Hello

    Hi everyone, I'm Patrick from Belgium. I like to repair stuff, when I can. At this moment, my hands are on an old (guitar) amplifier, which used to work but doesn't anymore. I'm looking for expert advice on some specific questions I have for this repair, and looking at the forum history I'm...
  7. EUVL

    Group Buy - Very Simple Almost Universal Speaker Protection

    ...value for Rrs. 10M will give the longest reset time while still sufficient to compensate for any leakage current of OP1. But you can also use anything between 1M and 10M. You will still get reasonable reset time, sufficient for you to switch off the amplifier for fault investigation. Patrick
  8. EUVL

    The Kaneda No.168 Preamp

    No sir. Not in my Spice model, AND also not in my actual build. The actual build use 2x 91R in parallel, i.e. 45.5R. All the distortion plots are also real measurements, not simulations. Patrick
  9. EUVL

    Preamp board, is this a good design to build?

    Great choice. :giggle: Patrick
  10. EUVL

    Depletion MosFET Buffer

    ...be done, need to plan upfront. Or add a DC Servo as in the Tubecad link : https://www.tubecad.com/2004/blog0023.htm BSP129 is not holly. You can also try DN2540, etc. But I prefer LU1014 cascoded a la Zen V9, biased at 200~300mA. Just need to simulate first to find the optimum bias. Patrick
  11. B

    Adaptor PCB 2SK2145GR as 2SK170BL Substitute

    We actually have danish supply companies, and on Google, they would be the first to show. Next would be Digikey, Mouser, Franell, RS-Online and TME, if they carry the products searched for. YMMV....... but I got your point/tease :ROFLMAO:
  12. Zen Mod

    Iron Pre Essentials Kits For The DIYA Store - Register Your Interest

    Naah ZM, I was just troublemaking, as usual Patrick Girlz & Boyz at Store Pa :spin: :snoopy:
  13. EUVL

    Group Buy - Very Simple Almost Universal Speaker Protection

    24 sets up to now. To make it easier for Fran to handle, we shall cut at 25 sets for the first batch. Those who subscribe after the 25th set will go onto the list for the second batch. Thank you for your interest, Patrick
  14. EUVL

    2SK117 vs 2SK209 Same but Different?

    ...amongst the many posts I have made on the topic. Of course the SMD part has a much lower dissipation rating. So you won't be able to use the BL grade with say 15V rails with good reliability margins. It all depends on the application. Patrick
  15. EUVL

    Mini speaker - Japanese 100 Yen shop "Daiso" - 300 Yen speaker's modified model

    2-inch. Probably similar : https://www.amazon.de/Audiocore-AC870-Kompakt-Stereo-Lautsprecher-Schwarz/ Patrick
  16. nandappe

    Mini speaker - Japanese 100 Yen shop "Daiso" - 300 Yen speaker's modified model

    Patrick, I understand. I hope you can listen the sound you like.
  17. B

    A Higher Voltage DIY Discrete Op Amp - In the Style of the DIY FE 2022

    Thank you Patrick for pointing out the power dissipation issue. I am always learning on my diy journey so it is always appreciated. Thank you Mark for the simulation. I also simulated the power up, but with the power supply (a zener shunt regulated mosfet voltage follower with 1000uf...
  18. Patrick Bateman

    The ABEC thread... (translated)

    kudos to @fluid for providing a new link : https://www.randteam.de/_Software/ABEC3_Pro/Download-ABEC-Pro.html
  19. EUVL

    A Trio of 4-Transistor Line Buffers

    ...we were using a much simplified of the Danyuk buffer, the performance is VERY similar to the original version. https://audioxpress.com/article/build-a-discrete-high-output-current-buffer-with-jfet-input-by-dimitri-danyuk Both the JLH and the (simplified) Danyuk are really great buffers...
  20. EUVL

    GB for Hiraga Le Monstre 2024

    Patrick
Top Bottom