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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 products

    Capacitor in original ST-70


    Posts : 1
    Join date : 2021-07-17

    Capacitor in original ST-70 Empty Capacitor in original ST-70

    Post by rmweisman Sat Jul 17, 2021 7:33 pm

    There are two small capacitors on the PC board. They read "Erie U2M 82 mmf +/- 10 %"
    What type of 82 pF capacitor is the proper replacement? I have read that ceramic caps are not great for sound.

    PS I have never really used a forum before.

    Posts : 35
    Join date : 2009-12-13

    Capacitor in original ST-70 Empty Re: Capacitor in original ST-70

    Post by 1973shovel Fri Jul 23, 2021 10:16 pm


    I'm not sure how your post ended up as a "sticky" but perhaps Bob will change that.

    You can replace the 82 pF caps using silver mica caps at 500 VDC or more. Mouser has them, or they're much cheaper and on sale at Parts Connexion at the moment ($0.80 each) but the shipping is going to hurt. Good luck with it.

      Current date/time is Wed Jul 28, 2021 3:16 pm