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    mark iii failure on startup


    daniel a

    Posts : 8
    Join date : 2013-12-26

    mark iii failure on startup

    Post by daniel a on Thu Dec 26, 2013 4:08 pm

    Approx 10 seconds  after startup Mark iii produces loud crackling noise and KT88 flashes
    and small amount of smoke from inside chassis. Odor near quad cap which was replaced 6
    years ago with Dynakit german quadcap.  Replace quadcap with SDS cap board and now a
    loud hum on startup. Any ideas ?     Thanks


    Posts : 2
    Join date : 2013-12-24

    Re: mark iii failure on startup

    Post by wrat on Fri Dec 27, 2013 1:34 am

    bad tube? quad cap failure caused by runaway tube? over voltage?

      Current date/time is Tue Jun 19, 2018 10:15 am