3 Jan
2008
3 Jan
'08
3:34 a.m.
Gene,
You could use one of the MAX232 chips by Maxim (others, such as analog devices make this
too)
Pretty cool family of chips - takes a logic level and translates to _+ RS232 levels, using
a single 5 or 3.3v supply and a internal charge pump. Only required external parts are
the .1 uf charge pump caps...
Randy
Date: Wed, 2 Jan 2008 21:48:14 -0800
From: geneb at deltasoft.com
To: cctalk at classiccmp.org
Subject: Re: Testing a 1488 line driver...
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Share life as it happens with the new Windows Live.
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I didn't check for -12V. I'll do that
before I go to the effort of pulling
the chip and replacing it.
Checked it. -0.60v There's a Elpac/TDC CB-3811 DC-DC converter on the
board that may have died. I'll pull the board tomorrow and test right at
the legs of the device. Thanks for questioning whether or not I'd checked
the -12v supply!
Finding a replacement is gonna be a stone b*tch I think. :(
I may have to go to another DC-DC converter that is near the same size
that I can wire in.
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.