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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 Dynakitparts.com products


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    Discharging capacitors

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    islanddave


    Posts : 20
    Join date : 2012-10-15

    Discharging capacitors Empty Discharging capacitors

    Post by islanddave Tue Jan 15, 2013 9:38 pm

    Hello,


    I would like to take a look inside the st-70 that I recently built. Nothing is wrong, but I just can't leave well enough alone. Should I be discharging any of the capacitors in the board, or most specifically the cap cap before venturing around on the inside of the amp?

    Thanks Dave
    Roy Mottram
    Roy Mottram
    Admin


    Posts : 1840
    Join date : 2008-11-30

    Discharging capacitors Empty Re: Discharging capacitors

    Post by Roy Mottram Tue Jan 15, 2013 10:36 pm

    definitely yes!! you can use any handy resistor, somewhere around 100 ohms works well for lower voltaqes, not more than 1K for higher voltages
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    islanddave


    Posts : 20
    Join date : 2012-10-15

    Discharging capacitors Empty Re: Discharging capacitors

    Post by islanddave Tue Jan 15, 2013 10:49 pm

    tubes4hifi wrote:definitely yes!! you can use any handy resistor, somewhere around 100 ohms works well for lower voltaqes, not more than 1K for higher voltages
    How exactly would I do this? My electrical experience can be summed up in the fact that I assembled the kit and that's it. I am green but would like to learn.

    Thanks

    Dave
    Roy Mottram
    Roy Mottram
    Admin


    Posts : 1840
    Join date : 2008-11-30

    Discharging capacitors Empty Re: Discharging capacitors

    Post by Roy Mottram Wed Jan 16, 2013 10:58 am

    using one or two clipleads (one on each end of the resistor), and power off on the unit, connect one end of resistor to chassis or power supply ground, the other lead to whichever capacitor you want to discharge.

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