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powering on 6400

Coming from a 3000. When turning on the power supply there is quite a thunk from the 6400. Is this normal?

Best Answers

  • KD0RC
    KD0RC Broomfield, COMember ✭✭✭
    Accepted Answer

    Hi Lee, There are some relays that make noise when powering up, is that what you are hearing?

    73,

    Len, KD0RC

  • W2JV_
    W2JV_ Member ✭✭
    Accepted Answer

    Lee, Check to determine if your speaker is on, I get that clunk when I shut down with the external speaker on.

    W2JV

    Peter

  • Ted  VE3TRQ
    Ted VE3TRQ Member ✭✭✭
    Accepted Answer

    With my powered speakers on a 6600M, I will get some audio noise when powering up or down (more when powering down than up). If the speakers are turned down, all I hear is the clicking of a bunch of relays.

  • Lee VE6MKM
    Lee VE6MKM Member ✭✭
    Accepted Answer
    The 3000 you hear a single relay click. 6400 is a real heavy tunk sound. I think I can hear a relay click in there as well. Same power supply Astron RM-35A. This is powering up from a total shutdown. I kill all power when done with the radio. Powering off ever thing first.
  • Lee VE6MKM
    Lee VE6MKM Member ✭✭
    Accepted Answer
    Speaker was the source. 3000 did not do that. Thank you: Lee
  • Lee VE6MKM
    Lee VE6MKM Member ✭✭
    Accepted Answer
    The 3000 you hear a single relay click. 6400 is a real heavy tunk sound. I think I can hear a relay click in there as well. Same power supply Astron RM-35A. This is powering up from a total shutdown. I kill all power when done with the radio. Powering off ever thing first.
  • John KB4DU
    John KB4DU Member ✭✭✭
    Accepted Answer

    Disheartening. Audio amps have had anti-thump during turn on for decades.

  • Neil D Friedman N3DF
    Neil D Friedman N3DF Member ✭✭
    Accepted Answer

    I hear no such “real heavy tunk sound” when powering up my 6600M.

  • KD0RC
    KD0RC Broomfield, COMember ✭✭✭
    Accepted Answer

    I hear it in my 6400, but I think it is due to keeping my amplified speakers all the way up. If I turn down the speakers and correspondingly turn up the Flex volume, I don't notice the noise. Since it is just a startup or shutdown thing, I don't consider it a problem and have gone back to keeping the speakers at full volume.

    73,

    Len, KD0RC

Answers

  • Lee VE6MKM
    Lee VE6MKM Member ✭✭
    The 3000 just made a quite relay click. With the 6400 I am using different speakers so that may make a difference. It still makes more noise than the 3000 when powering on. I usually wear headphones so will unplug the wart for the speakers until I need the speakers. Just being careful with the 6400 and do not want to **** things up accidentally. Thank you for the help.
    VE6MKM

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