Date   

Looking for XY monitor with storage tube.

Mattis Lind
 

Not really a scope but almost. I am looking for a XY display with storage tube. Tek 603 or perhaps 611.

Anyone that has one to sell?


Re: What was the first oscilloscope to have cursors?

cmjones01
 

On Tue, Jul 13, 2021 at 8:05 PM nj902 <wb0emu@arrl.net> wrote:

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.
Cursor voltage measurement on a Tek scope would have been possible in
1974, certainly. With a 7D12/M2 plugin the timebase delay settings can
be used to highlight a portion of trace for voltage measurement, and
any delayed timebase with a calibrated delay will effectively do
cursor time measurement. If you want on-screen digital readout of
delta-delayed time that comes in 1976 with the 7B85. So in the 7000
series scopes, I'd say that manually-controlled digital cursor
measurements of time and voltage were possible together for the first
time in 1976.

Chris


Re: A high-priced Tektronix RM504

Clark Foley
 

Fun reading! I noticed that a permanent AC line cord was added. That custom modification must be commanding the high reserve.


Re: A high-priced Tektronix RM504

stevenhorii
 

I doubt it will hit reserve unless someone has no idea what this scope is
worth. Unless I am wrong and the group really thinks it is worth that much.
It does appear to be in nice physical condition.

I usually use RR Auction for the space program and vintage computing stuff
I collect (my wife would probably say "hoard") and want to sell. They have
folks who know the various markets for things (they also have auctions for
autographs, Hollywood memorabilia, and "technology") and generally provide
reasonable estimates of selling prices. Sotheby's has a reputation for
offering high-value items so I suspect they are biased that way. I might go
to Sotheby's if I had an original Alan Bean painting of his Apollo subjects
but RR has sold things like the only wristwatch besides the famous Omega
Speedmaster (a Bulova chronograph) that was worn on the lunar surface (Dave
Scott, Apollo 15, third lunar surface walk - the crystal had fallen off the
Omega, so he wore the Bulova). That watch sold for $1.6 million. They sold
a functioning Apple-I computer for $458,711. You could add a lot to your
retirement fund if you have one of these sitting around!

Steve Horii

On Tue, Jul 13, 2021 at 11:42 PM Roy Thistle <roy.thistle@mail.utoronto.ca>
wrote:

On Tue, Jul 13, 2021 at 07:10 PM, stevenhorii wrote:


(it is an RM504) and undoubtedly was NASA property,
Sotheby's "estimates" it will go from 3000-5000 USD.
Southeby's also says, "Our scholarship and expertise in the art market
allows us to offer the highest level of service..."

--
Roy Thistle






Re: A high-priced Tektronix RM504

Dave Seiter
 

"Commonly referred to as O-scopes"  Really, by who?  I don't think I've ever heard anyone call them "o-scopes".  At least not here in the valley.  Maybe that's what they call them at Sothebys?  
One of my nixie counters has a "spacecom" tag on it, but I don't think it has any other tags.  I do have some ex-NASA stuff (tagged), but probably not very interesting.
-Dave

On Tuesday, July 13, 2021, 07:10:57 PM PDT, stevenhorii <sonodocsch@gmail.com> wrote:

This is one of the (potentially) higher-priced Tek 504s I've seen (it is an RM504) and undoubtedly was NASA property, but it is not a flight item:

https://www.sothebys.com/en/buy/auction/2021/space-exploration/oscilloscope-telemetry-control-panel

A fellow space collector has put his Apollo computer up for sale in this auction. It will likely go for a LOT of money. This is the only Apollo computer that has successfully been run so many years after it was built. It comes with a replica DSKY so you can run code on it (it does not have the core rope memory modules - it does have Raytheon test connectors presumably so Raytheon could run tests on different software versions without having different core ropes made.

Steve Horii


Re: A high-priced Tektronix RM504

Roy Thistle
 

On Tue, Jul 13, 2021 at 07:10 PM, stevenhorii wrote:


(it is an RM504) and undoubtedly was NASA property,
Sotheby's "estimates" it will go from 3000-5000 USD.
Southeby's also says, "Our scholarship and expertise in the art market allows us to offer the highest level of service..."

--
Roy Thistle


Re: Looking for an T5611-25 CRT (or -7 or -2)

Bob Rosenbloom
 

Thanks for checking. I did notice on the DEC schematic for the LINC, they show it as a 561A scope and the phosphor to be a P19.


A high-priced Tektronix RM504

stevenhorii
 

This is one of the (potentially) higher-priced Tek 504s I've seen (it is an RM504) and undoubtedly was NASA property, but it is not a flight item:

https://www.sothebys.com/en/buy/auction/2021/space-exploration/oscilloscope-telemetry-control-panel

A fellow space collector has put his Apollo computer up for sale in this auction. It will likely go for a LOT of money. This is the only Apollo computer that has successfully been run so many years after it was built. It comes with a replica DSKY so you can run code on it (it does not have the core rope memory modules - it does have Raytheon test connectors presumably so Raytheon could run tests on different software versions without having different core ropes made.

Steve Horii


2445b shelf vents for bottom air intakes - should I?

Keith
 

Hi guys and gals,

So, laying out a new shelf for my 2445b (and my 465b) on my revised electronics bench. For my scopes I have gone with a tilted shelf with 18 degrees tilt, because that's what my big brother did. (Thanks Mike! :-) While moving my 2445b around, I was reminded that the 2445b has air intake holes on the bottom side. I did some searching of past threads here about those holes. From searching these posts, and from common sense, I understand the bottom vents should not be blocked by sitting the bottom of the unit "flat down" on the shelf surface.

So, got that...don't block bottom vents. However, that got me to wondering...should I go one step further and open up more generous vent openings on my shelf? I mean several circular holes aligned with the scope bottom vent pattern - holes that would service the unit with relatively unrestricted airflow up through the bottom.

Normally, I wouldn't mind doing the modest amount of work required to cut four or five holes in my shelf...but these days I'm not looking for extra work. as the COVid disability aftermath makes every little cutting task an adventure. However, I perceive from reading various posts and comments that the cooling in the 2445b is about at the limit for a single muffin fan.

Has anyone else taken this precaution? Am I worrying about nothing? I really like my 2445b and hate to see her run hot just because I was lazy. I appreciate the great advice here on this group, and thanks in advance.

Keith
coolblueglow


Re: Members in Australia

guy_ellis_1964
 

Ping from 3068

Cheers,
- Guy


Re: What was the first oscilloscope to have cursors?

Dave Daniel
 

I’m guessing 7854?

DaveD

On Jul 13, 2021, at 14:05, nj902 <wb0emu@arrl.net> wrote:

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.





Re: What was the first oscilloscope to have cursors?

Mark Huffstutter
 

The 6R1 was the Plugin that did the magic, when it was in the Tek 567 scope.

Best,
Mark K7ZGT

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Jokken Feldhaar
Sent: Tuesday, July 13, 2021 11:27 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] What was the first oscilloscope to have cursors?

The 6R1 had highlighted portions of the trace and automatic measurement
functions, as well as an automatic readout - introduced in 1961, IIRC

regards, Jochen DH6FAZ

Am 13.07.2021 um 20:09 schrieb Paul Amaranth:

They were in the 468

On Tue, Jul 13, 2021 at 11:05:06AM -0700, nj902 wrote:
Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.







!DSPAM:60edd5dc299085352711267!


Re: What was the first oscilloscope to have cursors?

Jokken Feldhaar
 

The 6R1 had highlighted portions of the trace and automatic measurement
functions, as well as an automatic readout - introduced in 1961, IIRC

regards, Jochen DH6FAZ

Am 13.07.2021 um 20:09 schrieb Paul Amaranth:

They were in the 468

On Tue, Jul 13, 2021 at 11:05:06AM -0700, nj902 wrote:
Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.







!DSPAM:60edd5dc299085352711267!


Re: What was the first oscilloscope to have cursors?

Paul Amaranth
 

They were in the 468

On Tue, Jul 13, 2021 at 11:05:06AM -0700, nj902 wrote:
Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.







!DSPAM:60edd5dc299085352711267!
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix/Linux - We don't do windows


What was the first oscilloscope to have cursors?

nj902
 

Cursors as in highlighted dots (or bars) that can be moved along the trace with a corresponding method of determining time and voltage..

A second part of the question (if the answer is different) - which was the first Tektronix scope to have cursors.


Re: Looking for an T5611-25 CRT (or -7 or -2)

Bob Rosenbloom
 

Yes, that's a Calcomp 960 plotter with it's 907 controller. Some better photos of that can be seen about 1/3 the way down here: http://www.dvq.com/oldcomp/misc.htm. I restored that plotter about 10 years ago.

DEC used the 611 monitor on some of their PDP-8 systems. They painted it black and rebadged it DIGITAL. I have a few of those but they are not currently hooked up to anything. Fun stuff.


Re: PS503A max current

 

The 20V supplies are not independent and cannot be paralleled. The negative of the positive supply and the positive of the negative supply are common and cannot be separated.

A module such as this could give up to 3 amps at 3.3V from one of the 20 volts supplies: https://www.ebay.com/itm/223524573272

--
Bob Haas


ADMIN: TekScopes Moderators Required

Michael Dunn
 

Hi everyone. While Dennis has been doing a fantastic job running TekScopes, he could use some help and backup (which of course I’ve provided in the past whenever possible). So, we’re looking for one or three people who can share the duties.

What are the requirements?

1. Ideally you’ve moderated a group before, but more importantly, are “good with computers” and can generally figure out things on your own. The group mostly runs itself—the main task being to approve members’ first posts.

2. You follow or at least scan group postings, so you can keep on top of any issues that may arise.


Please don’t “apply” unless you’re quite sure you want to do this. I.e., we don’t want to be overwhelmed with applications :-} Tell us who you are and about yourself a bit, how long you’ve been in the group, etc.

This isn’t really a topic for group discussion, so please, let’s not start. Also, suffice to say that anyone who responds to this via the group will be barred from consideration! (that’s your first test) You can reply to me, but, no…better to send to the general “Moderators” email so both Dennis & I get it. That’s your second test ;-)

Thanks!
Michael


Re: Looking for an T5611-25 CRT (or -7 or -2)

 

The vintageTEK Museum can probably supply a CRT, but I doubt we have anything but P31 phosphor. I will be at the Museum tomorrow (Wednesday) and will check our stock.

--
Bob Haas


Re: What do you do when you get a call from AUSTRALIA

Nenad Filipovic
 

On Mon, Jul 12, 2021 at 6:37 AM Dennis Tillman W7pF <dennis@ridesoft.com> wrote:
Give me a few days to get caught up
Dennis Tillman W7pF
Thank you for your concern!!!
That really means a lot to me.
I'm happy to be back!!!
Who was it that called me all the way from Australia. I need to thank them
personally.
Hi Dennis, I'm glad you're OK and back with us. I second everything the rest of the group has said, especially the invitation to reach out. I hope the number of replies in this thread is enough of a proof that even if you don't feel like it (socializing), group members won't forget about you and will give comfort and support.

On Tue, Jul 13, 2021 at 04:13 AM, cheater cheater wrote:
I wanted to suggest something else, too. If we're feeling a bit more
generous with our contacts here, maybe we should also consider a voice
and real-time chat option to talk. I suggest setting up a Discord
server. If people here are OK with this idea I will post a link to a
discord server. It doesn't cost anything. Just want to know if people
are fine with it.
I think this may be a very good idea. Compared to other voice/video messengers, Discord is less invasive and gives the ability to limit yourself only to those features you find suitable (e.g. only chat and messages if voice/video calls are too much hassle for you). It might bring modern air to the group and serve multiple purposes - people would be able to assist each other in real time and with the aid of a camera, or just use the plain old text chat. Would be good to hear what think, perhaps it deserves a thread of its own?

Best regards,
Nenad FIlipovic

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