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[sindi keesan <keesan AT sdf.lonestar.org>]

Looking very closely, I can see that the CT4170(Creative) and 4180 
(Vibra), both without speaker out but with line/speaker jumper, and the 
AWE64 CT4520 have 1 or 2 (larger for the AWE64) square black things that 
at first glance resemble ICs but have only two connectors on only one side 
(on the AWE64 you can see a third connector between the black square and 
something under it which must be a tiny heat sink).  The older cards (CT 
and Crystal) have much larger transistors, and the heat sinks are fastened 
down with screws.

Transistors have 3 legs connecting them to the circuit.

So the better cards have one transistor each for L and R, and the cheaper 
Vibras have only one really tiny transistor for both?

The CT 4170 but not the Vibra16C 4180 has a clock chip - why?

On Fri, 10 Jun 2005, David Moberg wrote:

> ----- Original Message -----
> From: "sindi keesan" <keesan AT sdf.lonestar.org>
>
> > The newer AWE64 4520 has both line and speaker out, but no
> > transistors that I can see.  What does the 4000 series use to
> > amplify?  These cards get quite warm with minimal sound playing.
>
> A transistor? Transistors (especially the low-power type used on
> sound cards) may be hidden on silicon chips. Radioshack sells several
> amplifying chips, for instance, the LM386.
>
> David
>
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keesan AT sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org