The Dynaco Tube Audio Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.
The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


2 posters

    MK IV fuse

    WPFW893FM
    avatar
    WPFW893FM


    Posts : 14
    Join date : 2019-05-12
    • Post n°1

    MK IV fuse Empty MK IV fuse

    Post by WPFW893FM Sat Jun 15, 2019 9:27 am

    I always get agitated when these things happen. Anyhow the MK IV blew a fuse this morning. Blew a second one also I watched real close the rectifier tube seemed to arc? spark in its envelope. Had a similar problem with the other amp about a month ago put in a dif 5ar4 and it was fine. I guess those mullards I bought new the rec tubes are not built to last past 14 months or so? Who knows that would be the best answere for me right now. Have to dig one up or order two more.
    • Back to top
    Roy Mottram
    Roy Mottram
    Roy Mottram
    Admin


    Posts : 1838
    Join date : 2008-11-30
    • Post n°2

    MK IV fuse Empty Re: MK IV fuse

    Post by Roy Mottram Sat Jun 15, 2019 1:53 pm

    replace rectifier tube and fuse. replace quad caps if they are more than 10 years old.
    • Back to top
    WPFW893FM
    avatar
    WPFW893FM


    Posts : 14
    Join date : 2019-05-12
    • Post n°3

    MK IV fuse Empty MK IV fuse

    Post by WPFW893FM Mon Jun 17, 2019 1:19 pm

    Yes I did replace the fuse and the rec tube in that unit and the one next to it. Want to hear the whole story of it.?
    • Back to top
    Sponsored content

    Sponsored content


    • Post n°4

    MK IV fuse Empty Re: MK IV fuse

    Post by Sponsored content

    • Back to top
      Current date/time is Mon Nov 25, 2024 12:01 pm