Re: Servo Dynamics 1525 servo drive noise

>
>
> k8zre wrote:
>
> >Jon...
> >
> >I might havein my files, a complete schematic of 1525 board, if so
> >would you like a copy??...Richard.
> >
> >
> Thanks for sending that Servo Dynamics info. I have the book for a later
> version of the amp that uses MOSFETs. There are some 'black boxes'
> on the drawings you sent, also, but it gives a lot of details. I see
> they use a
> primitive and crazy scheme to drive the power transistors in the original
> BJT version of the amp, and that explains why the frequency has to be
> so low. Just a terrible design!
>
> Jon