$12 Ham Radio Power Supply

Discussion in 'Amateur Radio News' started by KB1THM, Apr 26, 2020.

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  1. KB1THM

    KB1THM Ham Member QRZ Page

    Greater Bridgeport Amateur Radio Club Technical Video:

    Don't like spending a lot of money on ham radio? Do you enjoy projects? Then this video is for you!

    How to convert a server power supply into a 12 volt, 63 amp ham radio switching power supply for about $12 (half the cost of that Baofeng handheld!). Check it out.

    -by Brandon kb1thm

    Attached Files:

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    K0UO, N4FZ, KG4BFR and 15 others like this.
  2. WQ6N

    WQ6N Ham Member QRZ Page

    I did something similar with a Dell Poweredge 6800 power supply. About 100amp DC.
    It did cost me more than $12. Even though the fan speed is adjustable, it was still put out some fan noise.
    Good for outside. It also needed a dedicated 15amp power input.
    Its all good.
    Dell poweredge 6800 PS Internal.jpg
    KB1QHI, N4FZ, KG4BFR and 1 other person like this.
  3. KD5OM

    KD5OM Premium Subscriber QRZ Page

    KI4ZUQ, N4LHY, N4FZ and 3 others like this.
  4. WA6LJR

    WA6LJR Ham Member QRZ Page

    I got a Supernight PSU . Fan noise and RF Noisy.
    WA8MEA and KT5OT like this.
  5. KI7HSB

    KI7HSB Ham Member QRZ Page

    Is this going to re-ignite the whole 13.8v vs 12.3v debate?
    K6LPM, WY7RF and N9FC like this.
  6. N4KIN

    N4KIN XML Subscriber QRZ Page

    I have two converted HP units. One does close to 13.8 the other 12.2. I've used both on my FT-857 without issue.
    W1LWT and MW0GYV like this.
  7. KB1THM

    KB1THM Ham Member QRZ Page

    If you want to go bigger there are models that run on 220v like this one made by dell and put out 197 amps @ 12 vdc! Also theres 48v models that people have been using to power LDMOS amplifiers. Currently selling on ebay for $20.

    Attached Files:

    K0UO, K6LPM and 4F8RS like this.
  8. K4ATR

    K4ATR Premium Subscriber QRZ Page

    would been a good video if he hadn't dropped the F Bomb while trying to connect the power pole!
    there are other models of the HP that is 75 amp on 120v or 100A on 220v and you can modify them to do 13.5 volts.
    KA2FIR and 2E0TWD like this.
  9. N6KZW

    N6KZW Ham Member QRZ Page

    so the resistor I used was 1k . giving me 13.98 volts... anybody know how much deviation from 1K to get 13.4ish?
  10. KI7HSB

    KI7HSB Ham Member QRZ Page

    The value of the resistor does not control the level of the output voltage. It is just a signal in to allow the power supply to turn on.
    There needs to be a resistor of a specific range because the analog level of the voltage into that pin (PSOK) will determine one of three states, one of which is 'Power Supply Fault' which will cause the unit to shut down.

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