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Article #344 (419 is last):
From: cd827@cleveland.Freenet.Edu (Jeffrey J. McWilliams)
Newsgroups: freenet.sci.comp.atari.questions,freenet.sci.comp.atari.spec.8bit
Subject: Re: Current requirments for xl
Reply-To: cd827@cleveland.Freenet.Edu (Jeffrey J. McWilliams)
Posted-By: xx004 (aa700 - Michael Current)
Date: Sun May  9 12:58:57 1993


In a previous article, dh395@cleveland.Freenet.Edu (Steven J Tucker) says:

>
>
>Does anyone know the ACTUAL min avail current required to operate
>the xl/xe & do all 3 5v lines have to be regulated seperatly..
>
>Also, I have my 800xl hooked to a composite monitor and the
>screen has, what i can only describe as a slight jitter to
>everything... is there any simple mod to the vid section i can do
>to eliminate this? does anyone else experence this or is my
>xl faulty?
>
Steve, 


Your screen jitters require the Ben  Poehland "SUPER  XL VIDEO II"
upgrade.  Send a large  SASE to the below address and I will return you
a full copy of the upgrade.   Requires a couple capacitors, resistors 
easily available at your local Radio Shack, and some soldering skill, maybe
some heatshrink tubing.  Although three of the pins on the power connector
say +5v, these 3 pins are all connected together, they are not 3 separate
+5 sources.  Having more than one pin carry either +5 or ground reduces
the resistance at the connector, thus reducing additional voltage drop 
across the power connector and cord.   You should use at least a 1A 
supply, more if you have more  RAM, extra OS ROMS, lots of cartridges, 
P:R: connection boxes or stuff like that, as they all draw power from the
computer.

Jeff McWIlliams

-- 
Jeff McWilliams  -->student, Electrical Enginnering, Michigan Tech. Univ.

cd827@cleveland.freenet.edu  OR  jjmcwill@mathlab.mtu.edu


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