"Lunch Box II" . Headphone amplifier, mounting and Assembly.

Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by Zampotech, Jun 25, 2019.

  1. Zampotech

    Zampotech Friend

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    I will share my experience in assembling this kit.

    This kit is announced here

    Initially I made the frame to accommodate the circuit Board. This is convenient, but optional

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    Start mounting PCB-A

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    The appearance of the finished PCB-A top

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    The appearance of the finished PCB-A bottom

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    Then prepare the wires for PCB-B. The length and purpose of the wires are specified in the instructions

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    Mount the second Board

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    Note that the capacitors on the edges of the Board have a gap above the Board. That's significant. It is also important to have a cardboard gasket under the transformer.

    Connect the wires

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    Install mounting brackets

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    Note the bracket is between the Board and the cardboard gasket. This is very important. In another case, the metal bracket will tear the transformer winding.
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    We mount the signal wires. Mark one of the wires, do not mix left and right channel

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    Preparing the back panel

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    Connect the back panel and the amplifier

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    Now the most responsible operation. You need to put all the panels and the bottom and top cover. You need patience and strength.

    As a result of this work we will get such an amplifier.

    [​IMG]


    With two smoke breaks and dinner Assembly I took 4 hours.


    I will be glad to answer any questions
     
    Sqveak, Baten, sfoclt and 20 others like this.
  2. Walderstorn

    Walderstorn Friend

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    Question, what did you have for dinner?

    More seriously, what can you compare it to?

    Thanks for sharing. I enjoy these DIY with several photos.
     
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  3. Zampotech

    Zampotech Friend

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    Answer: dinner is only salad (we had stuffy and hot, no appetite) and two Winston cigarettes are blue

    Thanks for your attention
     
  4. joch

    joch Friend

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    @Zampotech why cardboard instead of rubber or some sort of foam?
     
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  5. Zampotech

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    The transformer is heated during operation. The foam is impossible, it has a low melting point. Rubber can be, but electrotechnical or silicone, with a thickness of about 3 mm.
     
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