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The Blue Flash when turning on PS

Ron / K4XRF
Ron / K4XRF Member ✭✭
edited June 2020 in FLEX-6000 Signature Series
When I first turn on my cheap MFJ switching power supply, even though my Flex6400 is off there's a quick blue flash on the front panel (where the blue wavy Flex logo is). Has anyone else seen this?


  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited May 2019
    Ron, when your radio gets power there are components coming alive before you switch the radio on.
  • W9ILY
    W9ILY Member ✭✭
    edited May 2019
    Yes, every time. I believe it is normal according to Bill's post.
  • KF4HR
    KF4HR Member ✭✭
    edited May 2019
    Ron - My suggestion would be to try another power supply, perhaps a linear supply with sufficient voltage regulation and current capability and see if you get the same results. 

    As for the power up colors.  Tim describes them here:  https://community.flexradio.com/flexradio/topics/what_are_the_fex_6000_front_panel_led_indications

  • Robert Lonn
    Robert Lonn Member ✭✭
    edited May 2019
    Yes, I think this is normal as everyone sees the same thing. Also when you turn off your power supply and the voltage drops, you also get a red light even with the radio powered down.. I turn off my PS when I am done with radios, as I have 6 radios on the PS, including some cooling fans.. None of my other radios flash lights or do anything, just the Flex.. But since everyone with a 6600M or 6400M experiences this, and Flex has made no negative comments about this, one just needs to accept this and move on.
  • KI4P
    KI4P Member ✭✭
    edited May 2020
    yep! mine gets a quick flash when turning PS on and about 3 red flashes when you power down PS,as PS bleds down

  • WX7Y
    WX7Y Member ✭✭✭✭
    edited June 2020
    The reason is because the FLEX is always listening for a connection as long as it has power, This is by design other wise remote power on/off wouldn't work and when your running over the Ethernet cable because it IS A RADIO SERVER not a normal Radio as your other rigs probably are.


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