On 4/3/24 17:48, Sellam Abraham via cctalk wrote:
[snip]
If anyone has any information at all on the whereabouts of Joe Rigdon, and
for that matter John Lawson, please either reply here or to me privately as
appropriate.
Last contact info I have for John is:
738 Monico Dr.
Dayton, NV 89403
Has anyone communicated with or know a way to communicate with Joe Rigdon
out of Florida? Most here should know him as an old-school ClassicCmp
veteran.
If anyone has any information at all on the whereabouts of Joe Rigdon, and
for that matter John Lawson, please either reply here or to me
I wrote:
>> The digits are among the nicest looking digits that I've ever seen
>> on a CRT display, including those on the CDC scopes as well as IBM >>
>> console displays.
To which Paul responded:
> I have, somewhere, a copy of a paper that describes analog circuits > for
> generating
> On Apr 3, 2024, at 2:20 PM, Paul Koning via cctalk
> wrote:
>
>
>
>> On Apr 3, 2024, at 1:49 PM, Rick Bensene via cctalk
>> wrote:
>>
>> ...
>> Even with only having to render the digits zero through nine and a decimal
>> point (the calculator didn't support negative numbers; they
> On Apr 3, 2024, at 1:49 PM, Rick Bensene via cctalk
> wrote:
>
> ...
> Even with only having to render the digits zero through nine and a decimal
> point (the calculator didn't support negative numbers; they were represented
> using tens complement form), the display generator also used
For some reason the mailing list deleted the link to the photo, I'm sorry.
On 4/3/2024 11:01 AM, Mike Katz via cctalk wrote:
I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A
mainframe scope.
The 475A is rock solid and is one of the best analog triggering scopes
ever made. The
On 4/3/24 09:01, Mike Katz via cctalk wrote:
> I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A
> mainframe scope.
I still occasionally haul out my 465A. If I got rid of it, I'd have to
figure out what to do with the scope cart...
--Chuck
Paul wrote:
> The DD60 and its associated controller in the mainframe (6612 or 6602) was an
> > interesting beast. The interface between controller and display is a
> hybrid, > with the positioning information delivered as 9 bits each of X and
> Y, but the > character vectors are generated in
I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A
mainframe scope.
The 475A is rock solid and is one of the best analog triggering scopes
ever made. The 11403A goes all the way up to 3GHz but, tbh, is was a
difficult to use touch screen scope. I still use both of them
> On Apr 3, 2024, at 12:28 PM, Martin Bishop via cctalk
> wrote:
>
> Ignore my last - incontinence or is it incompetence
>
> A fairly ordinary GPU, in a PC, could almost certainly provide an XY display
> with Z fade (long persistance phosphor). I use them for waterfall displays
> and
I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A
mainframe scope.
The 475A is rock solid and is one of the best analog triggering scopes
ever made. The 11403A goes all the way up to 3GHz but, tbh, is was a
difficult to use touch screen scope. I still use both of them
Ignore my last - incontinence or is it incompetence
A fairly ordinary GPU, in a PC, could almost certainly provide an XY display
with Z fade (long persistance phosphor). I use them for waterfall displays and
they keep up - the data does of course arrive by E'net.
Equally, FPGAs / SOCs can
rfgh
-Original Message-
From: Guy Fedorkow via cctalk [mailto:cctalk@classiccmp.org]
Sent: 03 April 2024 16:02
To: cctalk@classiccmp.org
Cc: Guy Fedorkow
Subject: [cctalk] Re: oscilloscopes
Vintage computer enthusiasts might want to keep track of where to find
CRT-based analog
I have a pair of CDC6600 console CRTs (~12" diameter electrostatic deflection vector), I've been
working on "restoring" a console which I salvaged from Purdue surplus many years ago, but have kind
of stalled on at present and it takes up a significant amount of space. If someone would like to
> On Apr 3, 2024, at 11:21 AM, Mike Katz via cctalk
> wrote:
>
> I'm surprised some digital scope manufacturer hasn't implemented X-Y-Z
> control as an option. Driving X-Y was fairly common for certain types of
> signals. And many also used the Z input.
Oh, they offer X/Y display, but
> On Apr 3, 2024, at 11:16 AM, Paul Koning via cctalk
> wrote:
>
>
>
>> On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk
>> wrote:
>>
>> Vintage computer enthusiasts might want to keep track of where to find
>> CRT-based analog oscilloscopes, for use as output devices.
>> The early
I'm surprised some digital scope manufacturer hasn't implemented X-Y-Z
control as an option. Driving X-Y was fairly common for certain types
of signals. And many also used the Z input.
Back in the day there were many companies that made X-Y or X-Y-Z displays.
On 4/3/2024 10:01 AM, Guy
DEC used Tektronix R503 scopes for a display on many of their early
machines.
On Wed, Apr 3, 2024 at 11:16 AM Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
>
>
> > On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > Vintage computer enthusiasts
> On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk
> wrote:
>
> 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
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,
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