What is this IC?

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  1. - 9th January 2025, 00:39 #1
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    Default Re: What is this IC?

    I had to have a quickie look. Used 2 meters on diode mode and got these readings:

    Name: Diode Aneng DT9205A.jpg Views: 2851 Size: 180.1 KB

    Is the top one measuring resistance (339)?


    Name: Diode TES-2712.jpg Views: 2868 Size: 142.0 KB

    And is the bottom one measuring voltage (0.282)?
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

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  2. - 9th January 2025, 13:10 #2
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    Default Re: What is this IC?

    Then germanium it is!

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  3. - 9th January 2025, 13:43 #3
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    Default Re: What is this IC?

    These used to be the AM detector diode commonly used in transistor radios in the 80's and early 90's
  4. - 9th January 2025, 15:36 #4
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    Default Re: What is this IC?

    Then, Jerson, I bet you are around 60's ?

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  5. - 10th January 2025, 03:01 #5
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    Default Re: What is this IC?

    Almost there
  6. - 10th January 2025, 11:18 #6
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    Default Re: What is this IC?

    Obviously...!

    Youngers I am sure do not know about AM demodulation through germanium diodes!

    Once, at the age of 10-11, I made the first AM radio with such a diode, and an old telephone earpiece that was connected to a vertical metal waterpipe. It was amazing experience to here the local radio station with this!!!

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  7. - 11th January 2025, 02:48 #7
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    Default Re: What is this IC?

    I still should be having a couple of germanium transistors AC187 or similar in my toolkit from way back when I used to repair equipments.
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