19.025 Squeals and other noises spoil my GS stereo board sound? A fix?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
19.025 Squeals and other noises spoil my GS stereo board sound? A fix?
An unshielded cable going to J-17 can pick up some noise; but, it is not
likely to be noticeable except at higher volume settings when no music/sound is
being output. Rerouting the cable may help.
Really bothersome noise probably comes from the Slot bus feeding the Slot
your stereo board is plugged into. The problem is noticed more often on Rom-01
GS's than ROM 3's because the latter seem to have heavier power traces and this
helps reduce noise. However, any GS may exhibit Slot noise when a few power-
sucking boards (e.g. an accelerator) are plugged in.
For ways to reduce noise see the Power Supplies and Cooling FAQs file
CSA2POWER.TXT. Check Q&A related to power supply enhamcements and/or possible
swaps. Also check Q&A 019.
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