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    Switch for tone control ??

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    Pillo69

    Posts : 137
    Join date : 2012-04-11
    Location : Granada (España)

    Switch for tone control ??

    Post by Pillo69 on Wed Dec 21, 2016 5:36 pm

    Is it possible to use a switch for on / off in tone control in the PAS ?.

    I was thinking of using the Loudnes switch or the filter switch for it.

    A switch can be used for bass circuit. But ......, how to disconnect treble control ?.



    GP49

    Posts : 783
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: Switch for tone control ??

    Post by GP49 on Wed Dec 21, 2016 6:54 pm

    This is what Dynaco did to implement flat (out of circuit) controls on the PAS-2x and PAS-3x. Schematic shows the tone controls in the FLAT position:



    Dynaco had controls specially made; you can't!
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    Pillo69

    Posts : 137
    Join date : 2012-04-11
    Location : Granada (España)

    Re: Switch for tone control ??

    Post by Pillo69 on Wed Dec 21, 2016 7:32 pm

    You say that the previous scheme for the suppression of tone controls, is not correct ?.

    GP49

    Posts : 783
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: Switch for tone control ??

    Post by GP49 on Wed Dec 21, 2016 7:44 pm

    Note that in the PAS-Nx circuit, the 400K treble pot is open circuit in the flat position.


    Last edited by GP49 on Wed Dec 21, 2016 8:20 pm; edited 1 time in total
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    Pillo69

    Posts : 137
    Join date : 2012-04-11
    Location : Granada (España)

    Re: Switch for tone control ??

    Post by Pillo69 on Wed Dec 21, 2016 8:07 pm

    Surely I can not connect a switch 2cir./2pos., And I need a switch 4circ./2pos.
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    Peter W.

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    Join date : 2016-08-07
    Location : Melrose Park, PA

    Re: Switch for tone control ??

    Post by Peter W. on Thu Dec 22, 2016 7:40 am

    There is a gentleman named Mark Oppat (AKA the King of Kontrols)

    http://www.oldradioparts.net/

    Who may be able to fabricate a control that would accomplish the center-null function of the X-type tone control. He has the ability to make up parts from individual sections. And so might be able to cut the carbon ring in a typical control to create that null.

    Worth asking. And if he can, he might get quite a bit of demand from this venue alone.
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    Pillo69

    Posts : 137
    Join date : 2012-04-11
    Location : Granada (España)

    Re: Switch for tone control ??

    Post by Pillo69 on Sat Dec 24, 2016 5:57 pm

    Peter W. wrote:There is a gentleman named Mark Oppat (AKA the King of Kontrols)

    http://www.oldradioparts.net/  

    Who  may be able to fabricate a control that would accomplish the center-null function of the X-type tone control. He has the ability to make up parts from individual sections. And so might be able to cut the carbon ring in a typical control to create that null.

    Worth asking. And if he can, he might get quite a bit of demand from this venue alone.


    I have done the consultation.

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