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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


    Optimal Cap Values for PAM1 PS-1 Restoration Hum Reduction

    bubbasweet
    bubbasweet


    Posts : 87
    Join date : 2016-03-14

    Optimal Cap Values for PAM1 PS-1 Restoration Hum Reduction Empty Optimal Cap Values for PAM1 PS-1 Restoration Hum Reduction

    Post by bubbasweet Mon Aug 02, 2021 12:52 pm

    I will redo all the Can caps and the PS-1 also. Would you stay with original values or up them to decrease hum? I think the PS-1 is 10 10 450V, the PAMs 20 10 10 10?

    I will also shorten the wires from the PS-1 to the chassis from 6 Ft to 1ft. All in hopes of reducing hum. That is my prime goal.


    That being said anyone know a good source for the 3 I need? Prefer Metal can caps.

    Lastly do the carbon resistors around the power supply cap contribute to hum and is it worth replacing them or leave em if they measure correct? I love these PAM's tone, that is why I am doing this project. I have never been happy with small but still "room" noticeable amount of hum they generate compared to the PASs I have which is almost un-noticable. I did the filament caps and diode to silicon a long time ago.

    Any advice appreciated.

      Current date/time is Mon Dec 06, 2021 4:11 pm