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    Schematic for Grandmeister 36

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    Ed1108

    Posts : 2
    Join date : 2017-03-16

    Schematic for Grandmeister 36

    Post by Ed1108 on Thu Mar 16, 2017 7:46 pm

    Don't know if it has been posted anywhere yet.

    I know guys in the "tube swapping" section have been looking for a schematic for the amp for a while. This is the first I've seen of one.

    If you go to post 6 in the forum referenced below a PDF version of the complete official service manual including schematics is viewable and able to be saved and printed.

    music-electronics-forum.com/t41516/


    The schematics are on pages 25 - 32.

    I've only had a brief look. However, from what I can see it appears that those who speculated that the input was an OP-AMP are correct. The input is pretty much fed into an MC33078P OPAMP.

    V1 and V2 are preamp gain stages with the 2nd triode from V2 running as a cathode follower.

    V3 is the phase inverter only with both triodes in use driving the power amp.

    The power amp is a pretty straight forward push pull design, barring of course the complication added by TSC system.

    That's what I got giving it a quick look. Quite a few OP-AMP's in and around the tone stack some may actually handle audio some may be for control circuits. Obviously the control circuits are pretty involved.

    If this info has been posted elsewhere sorry for the duplication but I figured I'd post it because it may be of use to many here. I couldn't link directly to the forum because this is my first post
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    Ed1108

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    Join date : 2017-03-16

    Re: Schematic for Grandmeister 36

    Post by Ed1108 on Thu Mar 16, 2017 8:10 pm


    music-electronics-forum.com/t41516/



    Can't post a working link or actual PDF because I haven't been a member for 7 days, but put the above into any browser directly after "http://" and you will get there


    Post 6


    If someone gets to it that can re post directly - feel free to do so.
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    HwyStar
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    Re: Schematic for Grandmeister 36

    Post by HwyStar on Fri Mar 17, 2017 7:04 am

    Reminder: Please read the fourth FAQ of this forums FAQ page (http://handkusers.forumotion.com/faq). It clearly states not to post H & K schematics due to copyright infringements. If a schematic is posted on "this" forum then I will have to delete the post without notice. Sorry for that.


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    Re: Schematic for Grandmeister 36

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