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-----Original Message-----
From: Guy Fedorkow via cctalk [mailto:cctalk@classiccmp.org]
Sent: 03 April 2024 16:02
To: cctalk@classiccmp.org
Cc: Guy Fedorkow <fedor...@mit.edu>
Subject: [cctalk] Re: oscilloscopes
Vintage computer enthusiasts might want to keep track of where to find
CRT-based analog oscilloscopes, for use as output devices.
The early MIT and Lincoln Labs computers used D/A converters to steer and
activate the beam on analog scopes to draw vector images.
Working on Whirlwind simulation, we've been able to get this technique to work
with "real" oscilloscopes, e.g., Tek 475, but we have not yet found a single
DSO that has X/Y _and_ Z inputs (let alone the required phosphor fade).
Myself, I have a couple scopes with backups, so I'm not in the market for
another one. But others might consider the option...
/guy fedorkow
Date: Mon, 01 Apr 2024 22:33:38 +0000
From: Just Kant<kantexpl...@protonmail.com>
Subject: [cctalk] oscilloscopes
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk@classiccmp.org>
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I have more then I need. All the working ones are HP w/color crts, and as far
as older, verifiably vintage tools (right down to the 680x0 processor in
either) I have to admit I favor them as a brand. Call we an oddball, weird egg,
badges I wear with pride.
But who could resist the allure of the newer ultra portable, even handheld
units (some with bandwidth or sampling rates to 50mhz). I'm a big cheapo. But
there's no real reason to agonize over a 65 - 200$ or thereabouts acquisition.
It's a bit tiring to wade through the piles of availability. I favor a desktop
unit, larger screen (but not always, careful). But most of those need wall
current I think? The convenience of a handheld battery powered unit obviously
has it's benefits.
I will always love and dote upon my color crt based HPs. But the damned things
are so heavy, so unwieldy. Judy-Jude knocked my 54111d over, hit the paved
floor, shook the house. And still works! Built to withstand an atomic
bombardment.
