Radiofan_01

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Radiofan_01
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  • Quiet switch mode power supply (SMPS) for KiwiSDR

    Radiofan_01Radiofan_01

    Hello, interested on a 5V crowbar. Whilst using here an oldschool power supply .

    9V/ 4A transformer 120 VA, 2-way-rectifier. 10000µF als load capacitor, power regulator IC UA78H05SC TO3 and mounted on heatsink 0.5 K/Watt with actual delivering 5.13V on output. Output capacitor 470 µF. However for some extra secure operation i am keen to get knowing which 5V crowbar design should be working as desired. Who can give me an advice, very appreciated.

    Thanks in advance!


    SV1XV

  • Quiet switch mode power supply (SMPS) for KiwiSDR

    Radiofan_01Radiofan_01

    Now working fine 24/7 with an 5V-IC featuring maximum 5 A in a TO-3 housing.

    https://forum.kiwisdr.com/uploads/430/MDIR0FHIJD6E.jpg

    Unfortunately there are some fakes on the road, which disguise themselves in TO-3 housing, but never deliver the higher load current than approximately 1A. However you can easily sort them out by having a look on the mounting side. Some butterfly-like chip welding got the original ICs. This characteristic construction sign is valid also for other voltages e.g. 12V ICs as I could recognize.


    studentkra