Scope Choice for Vintage Computer Troubleshooting

From: J.C. Wren <jcwren_at_jcwren.com>
Date: Mon Oct 7 11:04:00 2002

        All LCD scopes are junk compared to a good tube scope. I understand that
you're spec'ing a LCD scope, but seriously consider a Tektronix 2445. This
is a four channel 150mhz scope, and they can be had for $400-$500. A 2465
is an even better choice, with the 2465B being the top of the line.
However, 300mhz is far more than you'll ever use day to day, and the B,
while having some nice features, drives the price up into the $1000-$1200
range.

        You can also find good deals on the P6131 probes for the 2400 series
scopes. These are far more flexible than the after market Scopemaster
probes. I've found new ones on eBay (unopened) for $35 on occasion.

        LCDs scopes are a compromise. The bandwidth is poor (though adequate for
most 4Mhz systems), and do very poorly on dynamic signals. They're OK to
capture a single image, but if you want to watch for jitter in a clock and
such, they're useless.

        Again, I acknowledge you've said you wanted a LCD scope, but if this is to
be a primary instrument, I would recommend a good tube scope instead.

        --John

-----Original Message-----
From: cctalk-admin_at_classiccmp.org [mailto:cctalk-admin_at_classiccmp.org]On
Behalf Of Mike
Sent: Monday, October 07, 2002 11:46
To: cctalk_at_classiccmp.org
Subject: Scope Choice for Vintage Computer Troubleshooting


Ok, I need some advice on what type of scope might be available for
troubleshooting vintage computers.
I have already decided that I need more than is necessary. I want to
limit my choice to a economically priced portable LCD scope. However, I'm
not familar with what is available.
Any good choices?
Received on Mon Oct 07 2002 - 11:04:00 BST