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Power supply

Discussion in 'Power Electronics' started by Jeanguypataterubberboot, Jul 20, 2013.

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  1. Jeanguypataterubberboot

    Jeanguypataterubberboot

    41
    2
    Jul 9, 2013
    I'm looking for advice on a power supply. I've narrowed it down to the bk precision 1686b, 1687b or 1688b. Just not sure if higher voltage or amperage is more important. I can't imagine I would need 60 volts for much. Although 20 amps might come in handy for powering a mobile hf radio one day. Also I wand to power breadboard circuits so accuracy and not overshooting voltage is important. Wouldn't want a spike to kill my project.

    Any suggestions would be appreciated.

    Pierre
     
  2. KMoffett

    KMoffett

    723
    75
    Jan 21, 2009
    I suggest you not look for a one-size-fits-all power supply. Get a +/-0to15V-1A and +5V/5A combined supply for the breadboard stuff. Also a 12/24v-30A supply for mobile radios. But, no idea what the 60V is needed for.

    Ken
     
  3. Jeanguypataterubberboot

    Jeanguypataterubberboot

    41
    2
    Jul 9, 2013
    Thanks for the advice. Is that because the lower voltage ones are more precise for breadboard circuits?
     
  4. Jeanguypataterubberboot

    Jeanguypataterubberboot

    41
    2
    Jul 9, 2013
    Also can you recommend a brand that has good specs?
     
  5. KMoffett

    KMoffett

    723
    75
    Jan 21, 2009
    Generally, yes.

    Ken
     
  6. Jeanguypataterubberboot

    Jeanguypataterubberboot

    41
    2
    Jul 9, 2013
    Specs on a power supply

    I'm thinking of purchasing this power supply. It's a BK Precision 1687b. It meets all my requirements.
    I don't know much about the numbers behind the specs as I aim new to these. Can anyone tell me if these numbers represent good quality for a bench power supply?


    Number of outputs 1
    Load regulation Voltage: Less than or equal to 50mV (millivolts); Current: Less than or equal to 100mA (milliamp)
    Line regulation Voltage: Less than or equal to 20mV; Current: Less than or equal to 50mA
    Ripple and noise Less than or equal to 5mV RMS (root mean square), or less than or equal to 50mV peak to peak
    Ripple current Less than or equal to 30mA RMS
    Meter accuracy + or – 2% + 3 counts
    Transient response time 1.5ms (milliseconds)
    Switching frequency 100 to 120kHz
    Power requirements 100 to 240VAC at 50 to 60 Hz
    Operating temperature and humidity 32 to 104 degrees F/0 to 40 degrees C, less than or equal to 80% relative humidity
    Standards met European Conformity (CE) marking
    Weight 2.4kg/5.2lb.
    Dimensions 90 x 200 x 208mm/3.5 x 7.9 x 8.2 inches (H x W x D)


    Thanks for the help.

    Pierre
     
  7. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,496
    2,837
    Jan 21, 2010
    Here is a review of the 1697. Is it similar?

    Dave also gives you some information on the company.
     
  8. davenn

    davenn Moderator

    13,833
    1,950
    Sep 5, 2009
    Pierre

    PLEASE dont start multiple threads on the same subject !!
    I have deleted one and merged the other intop this thread

    DAve
     
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