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    Please help, issues.

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    MyPetOctopus

    Posts : 17
    Join date : 2017-04-06
    Age : 43
    Location : Louisville, KY

    Please help, issues.

    Post by MyPetOctopus on Fri Aug 04, 2017 11:25 pm

    GMD40 sounded like crap tonight. No power, sustain, etc. Long story short, only two center lights were on, on the back of the amp. Guessing the two outer tubes took a dump. Big gig next Saturday, got a call in to Sweetwater, but may just have to re-tube it myself due to timing. Still under warranty, never been dropped, never been opened. Amp is only a few months old. Looking for thoughts, suggestions or advice.
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    MyPetOctopus

    Posts : 17
    Join date : 2017-04-06
    Age : 43
    Location : Louisville, KY

    Re: Please help, issues.

    Post by MyPetOctopus on Sat Aug 05, 2017 10:29 am

    Appears to have been user error. Oops. Lol.
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    Graham G

    Posts : 25
    Join date : 2017-05-09
    Age : 72
    Location : North West England

    Re: Please help, issues.

    Post by Graham G on Mon Aug 07, 2017 3:23 am

    In what way? Smile
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    Ravensha

    Posts : 32
    Join date : 2016-09-05

    Re: Please help, issues.

    Post by Ravensha on Mon Aug 07, 2017 3:23 pm

    Yes - I am curious what you found to be the user error too.
    Sometimes I have seen those lights on the back of my amp be on/off in various combinations.
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    MyPetOctopus

    Posts : 17
    Join date : 2017-04-06
    Age : 43
    Location : Louisville, KY

    Re: Please help, issues.

    Post by MyPetOctopus on Tue Aug 08, 2017 1:18 pm

    Long story short...I had it set to 20w.

    When I first fired it up, I got it nothing, no sound at all. Looked on the back panel, and it was set to silent. I obviously hit the button by mistake while setting everything up.

    I hastily hit the 20w button thinking that it was 40w. Had a lapse in memory that no lights was 40w. Thinking it was set at 40w, and the two center red lights illuminated, I assumed that I had blown a pair of tubes. In actuality, when you have it set to 20w, the amp itself takes two tubes out of the mix to drop the power down.

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    Re: Please help, issues.

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