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    ceramic disc capacitor

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    grizzinca

    Posts : 40
    Join date : 2011-12-31

    ceramic disc capacitor

    Post by grizzinca on Thu Dec 06, 2012 9:07 am

    Got a question.Can the .02 duel disc capacitor be replaced with a 2 mylar/film caps with the same values? Thanks for the help

    Tiziano73

    Posts : 29
    Join date : 2012-09-11
    Location : Italy

    RE: .02 Ceramic Disc Capacitor

    Post by Tiziano73 on Thu Dec 06, 2012 11:20 am

    Hi

    That capacitor, if i remember well, is mounted inside the chassis in the bias section of Stereo 70.
    You can use two caps instead the original one's but remember!!! That place become very hot when amplifier is on, so it's not a good idea use film capacitors.

    In my opinion, ceramic it's the best choice.


    Tiziano

    Bob Latino
    Admin

    Posts : 2414
    Join date : 2008-11-26
    Location : Massachusetts

    Re: ceramic disc capacitor

    Post by Bob Latino on Thu Dec 06, 2012 3:16 pm

    That dual disk cap can be replaced by film caps. It does get warm inside the amp but two film caps are OK to replace the dual disc cap that Dynaco used. Any film cap 50 volts or higher will be fine. In the VTA amp kits we use two .022 uF @ 100 volt film caps. Just to mention that those two caps are responsible for grounding the center taps of the two 6.3 VAC filament lines. As such, each of those caps (or each section of the dual disc cap) only looks at HALF the 6.3 VAC of the filament line OR each cap only looks at about 3.15 VAC. You could probably get by with a 16 volt rated cap here ...

    Bob

    grizzinca

    Posts : 40
    Join date : 2011-12-31

    Re: ceramic disc capacitor

    Post by grizzinca on Thu Dec 06, 2012 7:13 pm

    Thanks for all your help again. Little by little it's all starting to make sense.

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