[sdiy] Power supply

[Christopher Mullin]

Steve,

  I wired it up as you suggested.  Ground from the synth to the '-" peg 
(which as you guessed rightly also attached to the socket sleeves), and +12V 
to the '+' peg.  No more fuses blowing, but the module effect is that of an 
attenuator.  I can't detect any amplification.  I've replaced the 741 IC but 
with no effect.  Given the schematic at

http://velleman.be/Downloads/0/Manual_K1803.pdf

can anyone suggest what's going on.

Cheers,

Christopher

>From: Steve Ridley <spr at spridley.freeserve.co.uk>
>Reply-To: spr at spridley.freeserve.co.uk
>To: Christopher Mullin <stuadh at hotmail.com>
>Subject: Re: [sdiy] Power supply
>Date: Wed, 29 Sep 2004 14:05:50 +0200 (CEST)
>
>
>
>Christopher
>
> > The two power inputs are labelled + and -. It specifies 10-30V, so 
I
> > wired the -12V from the synth to the - peg, and the Ground from 
the synth to
> > the + peg, giving a potential of 12V overall.
> >
> > Can anyone suggest the correct wiring for this as I've run out of 
fuzes.
>
>Without the schematic of the preamp, it's going to be
>an educated guess, but I'd suggest the preamp "+" to
>+12v and the preamp "-" to 0v.
>
>I expect the signal screens also go to the "-" on the preamp,
>so by connecting it to -12v, you may have been shorting
>the -12v to ground, hence the blown fuses.
>
>A scan of the preamp schematic would confirm this.
>
>
>Steve
>
>
>--
>
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