Home Forums Help/Technical Questions 12ay7 mic pre phantom light not working, no signal

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  • #82332
    drb0mb
    Member

    that just about explains all the symptoms. the phantom switch doesn’t cause the light to illuminate, and i don’t get any sound from the unit with an otherwise working rode ntk or shure sm57. is this an obvious fix?

    the unit powers on fine, the blue light on the front lights up

    #117457
    Cryabetes
    Participant

    Have you tried it with a mic that doesn’t require phantom power? Does it pass signal when you do?

    #117460
    drb0mb
    Member

    yep the rode ntk is a valve condenser, it’ll pass signal straight into studio monitors and my interface but not through the preamp. same deal with the sm57

    #117461
    Cryabetes
    Participant

    …what?
    Not what I asked.
    Try running the preamp with the phantom power off and the 57 hooked up.

    #117462
    drb0mb
    Member

    sorry, i didnt elaborate enough. thank you for the replies though

    the rode ntk doesn’t require phantom power… it’ll send signal to my interface and also directly into speakers
    the sm57 will do the same, sends readable signal to my interface and audible signal directly into my speakers (although very quiet of course)

    neither of them work when the preamp is incorporated, both with phantom power enabled and disabled

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