Uses for 12v lamp output

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This topic contains 4 replies, has 4 voices, and was last updated by Profile photo of PEJ PEJ 4 years, 6 months ago.

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  • #58601
    Profile photo of johnc
    johnc
    Participant

    I would like to use the 12 volt lamp output on the back of the GLD-80 to power the relay that turns on the amplifiers about 100 feet away from the console. The amp relay draws very little power (less than any lamp) and conceptually it would work fine but my concern is how hardened is the 12 volt source.

    By connecting that source to a 100 foot wire one opens the door for induced spikes from nearby lightning and also the possibility of a short circuit due to error.

    Does anyone know how that voltage source is generated and is it current limited or otherwise protected? What sort of damage could be reasonably inflicted by using that output for something other than a lamp?

    #58611
    Profile photo of PEJ
    PEJ
    Participant

    Interesting use of the lamp voltage. Just use shielded mic wiring and you should be fine from a stability point of view. Your amplifiers will turn on after the mixer powers up, but unfortunately they will power down *after* the mixer, which is the wrong sequence. Maybe you have a plan for that. I used two sequencing power bars, one at the amps and one at the desk to ensure everything cycles in the correct order at the press of a button. In fact I have two power buttons in different areas for convenience.

    #58618
    Profile photo of fxk
    fxk
    Participant

    Good observation, PEJ. One could go the “crude” route – pull the lamp plug before shutting the mixer down. Not pretty, but effective.

    #58647
    Profile photo of dpnh
    dpnh
    Participant
    #58658
    Profile photo of PEJ
    PEJ
    Participant
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