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Williamson Ultralinear Amplifier - The Williamson tube amplifier

lechtube 6078 13
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  • Williamson Ultralinear Amplifier - The Williamson tube amplifier
    Hello!
    I want to present a stereo tube amplifier based on EL34, 6H8C, ECC82, EM84 tubes according to Williamson's scheme with some modifications. An additional anode voltage filter is added to the first amplification stage, and the EM84 lamps drive indicators are also mounted
    All housing elements are made as single copies.
    The layout is made on the PCB also of my development.
    The loudspeaker transformers are made by Mr. Łukasz Koza from Krakow,
    Network transformer produced by JDJ Elektronics Łódź {recommend} replaced in 2018.
    The amplifier was created in 2011 for my son Mariusz.
    The amplifier has been working for the eighth year and at that time only the power transformer made by P. Koza was overheating so I had to replace it.
    It was made to order by Mr. Kwiatkowski JDJ, it works great, it does not hum !!! does not heat up!
    By the way, I replaced the first input signal capacitors with MUNDORF, they are expensive, but I recommend them, listening is much better.
    There were no major problems with starting it, there was only a small hum that had to be eliminated, but it was a matter of mass handling.
    Driving the masses is the most important thing in this type of construction !!!
    Signal cables and the placement of input sockets are also of great importance.



    To avoid tube pairing, although I always try to use tubes with similar parameters, I used a separate volume potentiometer for each channel.
    The volume of each channel is adjusted separately - this is very practical.
    The loudspeakers can be placed in different places, and the listening level of each channel is set as needed.
    The lamps that work are the production of DDR / RFT and Russia.

    Regards, Leszek

    Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier Williamson Ultralinear Amplifier - The Williamson tube amplifier

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    About Author
    lechtube
    Level 10  
    Offline 
    lechtube wrote 9 posts with rating 85, helped 0 times. Live in city Sochaczew. Been with us since 2010 year.
  • #2
    And!
    Admin of Design group
    Effective design, or these holes in the back can be replaced with a mesh, but if they work well and there is not too much dust there, it can be.

    It would be useful to learn more about listening tests, device operation and the electronics design.
  • #3
    szeryf3
    Level 23  
    Very beautiful workmanship. I can see you've spent a lot of work on this project.
  • #4
    Piottr242
    Level 23  
    It's nice that the circuit on the printed circuit board is made humanly, and not with the "in the air" method, let's call it historical.
  • #5
    bubi89
    Level 21  
    Wow is impressive. It is true that I do not know about tube circuits, I can only comment on the performance, and these are at a very high level for me. A piece of work done.
  • #6
    User removed account
    User removed account  
  • #7
    398216 Usunięty
    Level 43  
    Two things about aesthetics, or rather refining it:
    1 / The silver screws do not match the rest. There are no blackened ones?
    2 / Since you have already taken the trouble to make the inscription on the transformer cover, why are the rest of the descriptions stuck on? I'm not saying that it looks bad - but an engraving with silver paint (or leaving the Al clean) would be much more "professional".
    And personally, I would seriously think over the lamp net, maybe it will spoil the overall appearance a bit, but it will certainly protect - both the lamps and ... someone who is curious against burns ...
    Aesthetics (apart from the two things that I would change) exemplary, not to say reference.
  • #8
    Kuniarz
    Moderator of Designing
    I don't know much about tube designs, but I can see a huge amount of work and time spent - for that, great respect!
    However, I think that the blackened screws with a cylindrical hexagonal head would give the amplifier a professional look ;-) The devil is in the details! ;)
  • #9
    lechtube
    Level 10  
    Ok thanks for the comments!
    They are right !!!
    In the next construction I have blackened screws !!!
    There is also a sticker on the trafo cover, but I think it looks good.

    greetings
    Leszek
  • #10
    398216 Usunięty
    Level 43  
    lechtube wrote:
    There is also a sticker on the trafo cover, but I think it looks good.
    Very good even. Then why isn't the rest like that? Oh, and one more thing - why so many exclamation points? I don't know if you know, but they are perceived like a scream - and nobody likes being yelled at ... ;)
  • #12
    And!
    Admin of Design group
    Can you count on amateur power measurements using resistors, a sine wave generator and an oscilloscope / multimeter with RMS?
    Ev. some more complex ones, such as distortions, harmonics, etc., e.g. using a sound card.
  • #13
    blue_17
    Level 32  
    Hello, congratulations on the construction because it looks very good, and probably sounds even better :)

    I have a few questions

    1.Is it possible to share PCB or gbr files, I would like to make such a construction.
    2. Where can these speaker terminals be purchased.
    3. I've seen slats designed to be mounted on a spider in your other design, probably ebonite, or can you buy it somewhere else?

    Best wishes
  • #14
    lechtube
    Level 10  
    Hello
    PCB is without documentation was made by hand, one piece and etched
    There are a lot of clamps on Allegro
    I bought a spider strip, but a long time ago / data tel 609796983 Jan


    greetings