Re: My Apple IIGS is back

["Michael J. Mahon" <mjmahon@aol.com>]

limtc wrote:
> You mean either the red or white cable? Why is it so?

Well, those are the "audio" cables, but when they are part
of a 3-cable set, they are usually exactly the same type of
shielded cable as the yellow "video" cable, so that wouldn't
make much difference.

Some audio cables, particularly mono cables, are quite a bit
thinner, and have considerably more capacitance per foot than
cables intended for video use.

The most straightforward way to attenuate the high frequencies
a bit is to make the cable longer--like by cascading two or
three 6-foot (2-meter) cables.  If you have some female-to-female
adapters, you could make your 3-cable set into a "folded" cable
18 feet long.  ;-)

> On 4锟斤拷21锟斤拷, 锟斤拷锟斤拷2时44锟斤拷, "Michael J. Mahon" <mjma...@aol.com> wrote:
> 
>>The first thing I'd try is to use the longest video cable you
>>have between the ROM 01 and the more sensitive monitor.  If you
>>don't have a cable longer than 6 feet, try an *audio* cable.
>>
>>The object is to increase the high-frequency attenuation of the
>>cable to reduce the level of the 3.58MHz burst somewhat, which
>>may be enough to fix the problem.
>>
>>If it does not fix the problem, a simple circuit may need to
>>be constructed to remedy the problem...

-michael

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