Home › Forums › Help/Technical Questions › DMM Classic gone wierdly microphonic?

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  • October 4, 2009 at 10:05 pm #79076
    noisepolluter
    Member

    Hi all,

    Today I’ve noticed a very odd overtone when the Deluxe Memory Man (old style box) is switched on – actually sounds halfway between radio interference and feedback, and only happens on the repeat. Also, when I adjust the delay time it makes a sound like retuning an old AM radio.
    I’ve ruled out (by swapping) the guitar, the amp, the pedals, the cables and the extension socket.

    Any suggestions/similar experiences?

    All help gratefully received.

    Thanks,

    NP

    October 4, 2009 at 11:52 pm #102021
    The EH Man
    Moderator
    Quote:
    Hi all,

    Today I’ve noticed a very odd overtone when the Deluxe Memory Man (old style box) is switched on – actually sounds halfway between radio interference and feedback, and only happens on the repeat.

    Normal occurrence when applying power to the delay ICs.

    Quote:
    Also, when I adjust the delay time it makes a sound like retuning an old AM radio.
    I’ve ruled out (by swapping) the guitar, the amp, the pedals, the cables and the extension socket.

    Also a normal occurrence when changing the delay time.

    October 5, 2009 at 7:48 am #102029
    noisepolluter
    Member

    Thanks for the prompt reply – my concern is that in 10 years of operation the pedal hasn’t done this before :/

    It’s a definite sort-of-metallic, sounds-like-something’s-wrong sound. Initially I thought it was a tube problem in the amp but it happens in the other amp and only on the delay effect.

    October 5, 2009 at 9:04 pm #102045
    noisepolluter
    Member

    I’ve worked out what the problem was, and am equal parts embarrassed and relieved.

    Turns out the chorus/vibrato switch was *somehow* balanced halfway (this is actually quite tricky to do deliberately), and the pedal understandably doesn’t like this.

    So it’s now all tickety-boo.

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