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  • From: sindi keesan <keesan AT sdf.lonestar.org>
  • To: baslinux AT lists.ibiblio.org
  • Subject: Re: [BL] Amplification (not relevant to BL)
  • Date: Fri, 10 Jun 2005 17:04:47 +0000 (UTC)

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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