Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcrware!mwca!bill
From: bill@mwca.UUCP (Bill Sheppard)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: NEC 3D and IB Multisync switchbox
Message-ID: <1798@mwca.UUCP>
Date: 21 Jan 91 19:52:19 GMT
References: <1991Jan18.220827.4568@ecst.csuchico.edu>
Organization: Microware Systems Corp., Santa Clara, CA
Lines: 26

In article <1991Jan18.220827.4568@ecst.csuchico.edu> ekrimen@ecst.csuchico.edu (Ed Krimen) writes:
>[discussion of switchbox woes deleted]
>I am now using an IB Multisync switchbox...
>...for less than $55.  It uses a 9V, 500milliamp power adaptor that I 
>needed to sync in monochrome so I used the one from my Atari 2600
>in the closet.

I'm surprised a power supply is needed. I've built a cable (RF nightmare,
I'm sure, but the picture quality is perfect with the Sony 1302) which has
a headphone jack for audio and a switch for mono/color switching. No need
for a power supply, the switch grounds the mono detect line when in mono
mode from the ground connection of the monitor port. It's ugly, but works
perfectly, and the headphone connection allows me to use my powered speakers
for awesome sound, or a small amplifier I built around Radio Shack's amplifier
chip for ~$10 with headphones for non-powered speakers. Perhaps the IB
switchbox has an amplifier in it for which power is needed? Anyway, my
setup just looks like a serial cable with a headphone socket and an ugly
pink toggle switch a few inches from the ST end. I've hardwired the nine-pin
female connection for the Sony, but would be easy enough to rework for other
connections.

-- 
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#  Bill Sheppard  --  bills@microware.com  --  {uunet,sun}!mcrware!mwca!bill   #
#  Microware Systems Corporation  ---  OS-9: Seven generations beyond __/_!!   #
#######Opinions expressed are my own, though you'd be wise to adopt them!#######