Path: utzoo!utgpu!watserv1!watmath!att!cbnewsj!davet
From: davet@cbnewsj.att.com (Dave Tutelman)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: noise on PC speaker
Summary: You could add a vol control
Message-ID: <1990Sep21.113842.19834@cbnewsj.att.com>
Date: 21 Sep 90 11:38:42 GMT
References: <1990Sep17.152547@crazy.inria.fr> <15090012@hpspcoi.HP.COM>
Distribution: na
Organization: AT&T Bell Labs - Lincroft, NJ
Lines: 27

In article <15090012@hpspcoi.HP.COM>, dlow@hpspcoi.HP.COM (Danny Low) writes:
> >I have bought a 386SX to work (and play) at home. But the speaker sounds too
> >loudly
> 
> There is no volume control on the PC speaker. You can either disconnect it
> or put in a switch to disconnect/connect it. Either operation is simple
> and can be done cheaply.

If you're willing to go to the trouble of putting in an on-off switch,
it isn't that much more difficult to add a volume control (I've done it).
Just get a potentiometer of about 50-100 ohms, and connect it in as
follows:
   -	The two wires from the motherboard go to the two ends of
	the resistance.
   -	One wire from the speaker goes to the sliding tap.
   -	The other wire goes to one end of the resistance (sharing
	that lug with one of the wires from the motherboard).
	Experiment a little. One end will give you an "off" position
	in the full-counterclockwise position (what you want);
	the other will have it at full-clockwise.

The hardest part is the carpentry on the case, if you decide you want 
to adjust the volume from the outside.  The same is true for the
on-off switch.

Cheers!
Dave