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WTD Mission cambridge amplifier

Discussion in 'Electronic Repair' started by Cees Keyer, Aug 17, 2005.

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  1. Cees Keyer

    Cees Keyer Guest

    L.S.
    I am looking for a mission Cambridge schematic or service doc.
    The problem is every few seconds a huge TICK sound in the speakers.
    I thought it was a malfunctioning ELCO but all are ok.
    So i am in the blind now, any one with a sugestion please do mail me.

    remove -no-spam- from the e-mail address.
    TnX in advance
     
  2. Asimov

    Asimov Guest

    "Cees Keyer" bravely wrote to "All" (17 Aug 05 09:41:56)
    --- on the heady topic of "WTD Mission cambridge amplifier"

    A periodic click may be an intermittant oscillation whenever the
    output stage clips or reaches some threshold value but perhaps it may
    be a speaker problem, have you tried testing them?

    An oscillation is often due to a marginal bypassing or poor supply
    regulation. Sometimes the feedback loop is involved in combination
    with an highly capacitive speaker load. For instance some fat
    specially speaker cables are known to introduce enough capacitance to
    make some amplifier outputs unstable.

    Alternately, a driver stage with weak gain may be saturating and
    cutting off the feedback signal which might make the outputs hit the
    rails and the click you hear.

    Does the click happen at low listening levels or only at normal to
    loud playing?

    A*s*i*m*o*v


    CK> From: Cees Keyer <>
    CK> Xref: core-easynews sci.electronics.repair:339896

    CK> L.S.
    CK> I am looking for a mission Cambridge schematic or service doc.
    CK> The problem is every few seconds a huge TICK sound in the speakers.
    CK> I thought it was a malfunctioning ELCO but all are ok.
    CK> So i am in the blind now, any one with a sugestion please do mail me.

    CK> remove -no-spam- from the e-mail address.
    CK> TnX in advance

    .... A stereo system is the altar to the god of music.
     
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