Date   

Re: A "collection" with quite a few Tek 'scopes

toby@...
 

On 2017-12-31 1:42 AM, Dano wrote:
Yes, in one (possibly more) of his Youtube video's he states his move to Patreon for his "training and educational" videos, if I remember any of it right. I didn't mean to imply he completely moved away from public YouTube, my bad there. But his intent was to provide better structured training videos with some income, can't blame him for that at all. Actually, I looked forward to it because I wanted to learn it, not just watch whatever he decides to demonstrate. I like that too, but that's more informational, than training. Maybe he ended up ditching the whole thing, have no idea.

The timing happened to be when I had other critical things going on, and had to put everything on the back burner. Probably a year ago now. So it was an easy decision just to drop off for the time being. I wasn't a big deal, I just was disappointed because I still wanted to follow along, but absolutely couldn't afford the time or money at that point. A little like paying for a gym membership and never going, been there done that.

Anyhow, I do fully support his endeavor, and when I have the funds to share, I will. I donated to Wikipedia and that tapped me out for now. choices.... sigh...
Ah, thanks for the extra context. I should have checked his Patreon
page, which also answers my question. He announces 37 patron-only posts
there. I guess YouTube is the main promotional avenue for these.

https://www.patreon.com/MrCarlsonsLab

Maybe I should pay a few patronage bucks to see what that material is
like, as an electronics learner!

If Patreon pulls more dirty tricks in 2018 (some feel their business
model/investors will require it) then I'd hope he'll be open to other
funding options.

--Toby


Cheers!

-Dano




Re: 7A29 overshoot

cmjones01
 

On 31 Dec 2017 12:39 a.m., "Nenad Filipovic" <ilmuerte@gmail.com> wrote:

On Sat, Dec 30, 2017 at 10:33 PM, cmjones012003 <chris@stumpie.com> wrote:
I looked at the 7904A calibrator output on my sampling scope, which
should give as accurate a picture as I can manage, and that shows a bump
just the same:
https://photos.app.goo.gl/F3MUCs38rUW5e9my1
<https://photos.app.goo.gl/F3MUCs38rUW5e9my1>

Thanks for the image Chris, so those calibrators are more-less the same.
I have posted photos from this thread to a group album named "7A29
feed-beside compensation adjustment", you can add your image(s) to it if
you wish, the album is public.
Hope you also manage to fix your units in a similar way,

I've just added a photo of the calibrator waveform viewed on my CSA803A to
the album. Thank you for creating it. If I get good pictures of my 7A29s'
overshoot I'll add them too.

Chris


2465B CTT calibration question

 
Edited

I need to run the CTT calibration routine to remove an error message but I don’t have pulse and time-mark generators. I have several function generators, signal generators, and a 1 MHz and 10 MHz TCXO. Can any of these be used to run the routine?


Re: Curved CRTs?

 

Drifting away from original subject that did remind me of one vacuum tube
oddity I have in my stash.
Is anyone familiar with the General Electric "light valve" used in the
Talaria projectors?


Re: TDS460A Firmware?

Dano
 

On Sat, Dec 30, 2017 at 09:45 pm, <toby@telegraphics.com.au> wrote:

What are the risks? Any calibration impact?
Documentation is included with the zip file. Specifically, Page 18 of the Field Upgrade Procedures:

"When signal-path compensation has completed, the oscilloscope is in the same state of calibration as before the loading of the new firmware."

Sounds like you should be relatively safe!

Still can't find my GPIB board, so I'll have to wait to try this... Anyone have a NI GPIB/TNT ISA board, they wanna trade something for (or possibly sell dirt cheap)?

Cheers!

-Dano


Re: A "collection" with quite a few Tek 'scopes

Dano
 

Yes, in one (possibly more) of his Youtube video's he states his move to Patreon for his "training and educational" videos, if I remember any of it right. I didn't mean to imply he completely moved away from public YouTube, my bad there. But his intent was to provide better structured training videos with some income, can't blame him for that at all. Actually, I looked forward to it because I wanted to learn it, not just watch whatever he decides to demonstrate. I like that too, but that's more informational, than training. Maybe he ended up ditching the whole thing, have no idea.

The timing happened to be when I had other critical things going on, and had to put everything on the back burner. Probably a year ago now. So it was an easy decision just to drop off for the time being. I wasn't a big deal, I just was disappointed because I still wanted to follow along, but absolutely couldn't afford the time or money at that point. A little like paying for a gym membership and never going, been there done that.

Anyhow, I do fully support his endeavor, and when I have the funds to share, I will. I donated to Wikipedia and that tapped me out for now. choices.... sigh...

Cheers!

-Dano


Re: TDS460A Firmware?

Dano
 

Jack: Many thanks!

Toby: There's a video I just watched on YT the other day, for a calibrating TDS scopes that gives some detail to it, but he's doing a calibration routine, not necessarily a firmware update. Worth watching.

https://www.youtube.com/watch?v=MzL5R_oGC3M

Now if I could just find my GPIB board I've had kicking around for years, doing nothing...

Cheers!

-Dano


Re: A "collection" with quite a few Tek 'scopes

toby@...
 

On 2017-12-30 10:42 PM, nojunkmail@cd-envisions.com wrote:
I really like his video's. He doesn't talk too fast that you can't follow along, if anything he might draw it out too much, but I don't mind that. Plenty of technical details for my skill level.

However, once he switched to Patreon, I dropped off. Is he worth it, I'm confident he is, but not through Patreon, for me. That whole scheme rub's me wrong (the company, not Carlson). I don't believe their propaganda, and their track record isn't exactly stellar. Matter of fact, it just got worse, if they implement the new double-dip pay scheme.
To say he "switched to Patreon" only makes sense if there is
sponsor-only content. Is he actually doing that? If so, he must be
promoting it somewhere or how would we know...

Otherwise just subscribe to his YT, you'll still get notices. And
support him by other means if you don't like Patreon.

--T


Anyhow, I'm glad to hear he's still posting publicly on YT. I'll go back to and see what's new, when I have time to kill...

Cheers!

-Dano




Re: A "collection" with quite a few Tek 'scopes

toby@...
 

On 2017-12-30 4:51 PM, Raymond Cote wrote:
Link does not work. I’ve been trying!’n
Plays fine here. Are you able to view YouTube in general?

--T

Women and cats will do as they please, and men and dogs should just relax and get use to the idea.

-Robert Heinlein

On Dec 30, 2017, at 15:01, Twig <ki6j@hotmail.com> wrote:

The instrument is a Specific Products model WWVC receiver for WWV signals. Crystal-controlled, with a Collins mechanical filter. Quite the thing back in its day.

The manual is available online.

Here is one in operation: https://www.youtube.com/watch?v=L1EiLRfKgTg

If you suddenly feel the need to have one for your very own, PM me -- I have one holding down a corner of the shelf :-)




Re: TDS460A Firmware?

toby@...
 

On 2017-12-30 10:59 PM, Jack Rubin wrote:
I've created a new folder called "TDS460A Firmware Upgrade" which contains the files necessary to upgrade from 1.0 firmware. If you can't download the .zip file, grab the .pkg file - same thing with a different file type. You will need a DOS machine and GPIB interface to perform the upgrade.
Definitely useful to me, as a 460A owner.

What are the risks? Any calibration impact?

--Toby


Hope someone finds this info useful!




Re: TDS460A Firmware?

Jack Rubin
 

I've created a new folder called "TDS460A Firmware Upgrade" which contains the files necessary to upgrade from 1.0 firmware. If you can't download the .zip file, grab the .pkg file - same thing with a different file type. You will need a DOS machine and GPIB interface to perform the upgrade.

Hope someone finds this info useful!


Re: A "collection" with quite a few Tek 'scopes

Dano
 

I really like his video's. He doesn't talk too fast that you can't follow along, if anything he might draw it out too much, but I don't mind that. Plenty of technical details for my skill level.

However, once he switched to Patreon, I dropped off. Is he worth it, I'm confident he is, but not through Patreon, for me. That whole scheme rub's me wrong (the company, not Carlson). I don't believe their propaganda, and their track record isn't exactly stellar. Matter of fact, it just got worse, if they implement the new double-dip pay scheme.

Anyhow, I'm glad to hear he's still posting publicly on YT. I'll go back to and see what's new, when I have time to kill...

Cheers!

-Dano


Re: 7K mainframes common-mode input range?

Ed Breya
 

Thanks David, for refresh of the link to Hakan's - I've seen many of the documents there but always seem to misplace my downloaded ones. I was using the info on the PS ratings listed in the 7A17 manual, which make sense being there since it's for DIY plug-ins, more or less. The power is indeed quite limited for serious high speed logic circuitry, but I'm trying to live with it rather than adding a switcher. For example, I have some relays to drive, and they will run from the +15 into the +5, so the coil currents will add to the +5 output availability. I've got the ECL down to a minimal number of pieces, just for the fastest stuff, then 74HC for the rest.

Ed


Re: TDS460A Firmware?

Dano
 

LOL

How did I know that would happen!#@!

Well, I have to admit, when I was searching for it previously (about a month ago), I think the Tek groups were moving from Yahoo to here and every time I tried to pull up an article, it would say it didn't exist. All I could do was look at the "cached" page and that was only good for the first page. Gave up cuz it was annoying the hell out of me. Then, I tried to join the Tek group, but it wouldn't let me. It wasn't until a few weeks ago that I was finally able to join the group and realized it was due to the fact the group was moving. Sure had Google search results completely f*d up, for well over a week.

Anyhow, thanks for pointing out the obvious. (hind sight....)

I'll go and read that thread.

Cheers!

-Dano


Re: TDS460A Firmware?

Malcolm Hunter
 

Did you see this thread on the Tek forum?

https://forum.tek.com/viewtopic.php?t=132532

Seems you need to use the GPIB. They also talk about using DOS/Windows 95 for that.

Malc

On 31 December 2017 00:46:51 nojunkmail@cd-envisions.com wrote:

Anyone have newer firmware than v1.0e for the TDS460A series?

I'd like to update mine to newer, as I did read there were a few operational bugs fixed. Plus it'd be cool to add FFT option to mine, just cuz...

I know there is newer firmware, from screen shots I've seen on the web, but haven't found a single edition of the firmware on the 'net. Maybe I'm looking for the wrong thing. How did they update the firmware in the field or did they? Floppy, GPIB, Serial, burn it? That'd help narrow my searches, some more, but that's not really the problem here, it's that there isn't that many results to begin with.

It's also possible that the 460A is compatible with the others in that series, but I don't like taking chances when it comes to the firmware. Seems like the 460A is fairly ignored. Tons more info for the non A's, and everything else in that series, but not so much with the 460A. And then, depending on which book you look at there are more models lumped together in this "series". Which one do I believe?!?

Anyhow, if you have newer firmware on file, that'd be great! (said in Lumbergh's voice... office space reference Lol)

TIA!

-Dano


TDS460A Firmware?

Dano
 

Anyone have newer firmware than v1.0e for the TDS460A series?

I'd like to update mine to newer, as I did read there were a few operational bugs fixed. Plus it'd be cool to add FFT option to mine, just cuz...

I know there is newer firmware, from screen shots I've seen on the web, but haven't found a single edition of the firmware on the 'net. Maybe I'm looking for the wrong thing. How did they update the firmware in the field or did they? Floppy, GPIB, Serial, burn it? That'd help narrow my searches, some more, but that's not really the problem here, it's that there isn't that many results to begin with.

It's also possible that the 460A is compatible with the others in that series, but I don't like taking chances when it comes to the firmware. Seems like the 460A is fairly ignored. Tons more info for the non A's, and everything else in that series, but not so much with the 460A. And then, depending on which book you look at there are more models lumped together in this "series". Which one do I believe?!?

Anyhow, if you have newer firmware on file, that'd be great! (said in Lumbergh's voice... office space reference Lol)

TIA!

-Dano


Re: 7K mainframes common-mode input range?

 

The only documentation that I am aware of which discusses the power
and current limits of the 7000 power supplies is the Tektronix one
which discusses the 7704A, 7904, and 76xx power supplies:

http://hakanh.com/dl/docs/hardtofind/7k_PS_currents.pdf

Some plug-ins converted a higher voltage supply to a lower one to
provide enough current. 7D15 uses a switching power supply to convert
-15 volts to -5.2 volts for ECL. The 7D01 uses an inverter to convert
the +15 and -15 volt supplies to -4.8 and -2.0 volts for ECL. I think
someone mentioned here that it was so power constrained, that they
used a slightly lower voltage. The -2.0 volts is used specifically
for ECL termination also saving power so they must have been
desperate.

On Wed, 27 Dec 2017 17:13:52 -0800, you wrote:

Yup, that's what I have - the PECL output bias currents go through the dropping Zener/R networks and then larger resistors all the way down to the -15V supply. They act more as constant current sources, and may even improve the speed by keeping the quiescent emitter currents nearly the same in both states, but the main function is to pull enough current while not being so low in R that the 50 ohm environment is hard to achieve. The outputs are Schottky-clamped in case things get out of hand with the -15V termination. As you can imagine, it's not power-efficient at all, but only needed at certain spots, so not too bad overall - wouldn't want to do all the outputs with such loads.

Speaking of power, it is my understanding that the +/-15V and +5V supplies are rated up to 500 mA each - but not all at the same time of course - as long as total (single-wide) plug-in power is less than 16.5W. Does anyone have info or advice to the contrary? I don't think I'll have anything near the maximums, but do need to run a 1 GHz PLO at 130 mA from -15V, plus two or three of these high power ECL shifter/terminations up to 40 mA per set. The +15V needs maybe 200 mA for amplifiers, while the +5V will run all the PECL Vcc, maybe 400 mA or so. I'm picturing less than 10W for the major items, leaving a few for miscellaneous.

Ed


Re: First draft of the Tek knob visual index project

Dano
 

I am interested in helping with this project. I don't have Solidworks skills, but I do have 3D modelling skills (Mastercam). Solidworks is in progress, but that's the difference of learning gimp vs photoshop (bad comparison I know, but you get the idea).

Anyhow, I have a Tek manual on specifications that also contain "blueprints", with dimensions and all that. Not truly blueprints, but good 'nuff for what were doing, I believe. I just picked it up off of flea-bay and is called the "1988 Mechanical Catalog: Volume 2". I bid against someone else, but I was determined not to miss this, since I don't trust the other buyer to scan it in and share it, as I do. Plus it happened to be local to me - which just about never happens.

Does anyone else have the other Volumes?

There's gotta be volume 1 out there at a minimum, if it hasn't been destroyed - as so eloquently stated in the book

Quote from first page, "DO NOT SEND YOUR OUTDATED CATALOGS TO THE COMMON DESIGN PARTS CATALOG GROUP. PLEASE SEND OUTDATED CATALOGS TO SALVAGE."

I have somewhat limited access to HAAS CNC machines, so I can make "some" things, if I don't take too much machine time away from the shop. I envision that I could probably easily make faceplates (out of plastic) on the CNC, with probably better results than a 3D printer (and a lot less work). Knobs, might be more difficult. Fixturing (holding) is probably the most difficult thing for me to do on the CNC with these types of widgets. Never tried to make an angled knob - I'm still relatively new to machining processes (couple years in school only gets you to entry level) but it sure as heck won't stop me from trying.

Cheers!

-Dano


Got help thanks (Re: Need OEM 7D20 service manual help)

Artekmedia <manuals@...>
 

All

I have a volunteer to help me out

Dave
manuals@artekmanuals.com

On 12/30/2017 4:45 PM, Artek Manuals wrote:
I am cleaning up an old scan ( circa 2004) That I did of the 7D20 service manual. I don't need any scanning help but I need someone with an original OEM paper manual to tell me the lettering in some of the gray note boxes on some of the schematics. There are several free downloads but they seem to have had the same problem I had in 2004 getting the gray note boxes scanned and most are solid black.

Will make it worth your while, contact me off list at manuals@artekmanuals.com
Dave
manuals@artekmanuals.com
--
Dave
Manuals@ArtekManuals.com
www.ArtekManuals.com


Re: Need OEM 7D20 service manual help

Dano
 

Keeping it short and sweet. Check your email...

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