Date   

576 Printact relays contact wear

Ed Breya
 

Continuing on this 576, I removed the four Printact relay armature assemblies, and found that the gold plated contact pads on the board were quite pitted on the two uppermost units. I did not expect to see this kind of wear. I cleaned them all up with IPA and treated with Deoxit D100 then Deoxit Gold.

It seems to mostly work now. The original problem was that there where sort of random offset jumps between the 1-2-5 vertical gain steps - sometimes (usually) there would be an offset, and sometimes not, while rolling through the ranges. I adjusted the offset pots close enough now that it's quite good after warmup, but I still see an occasional jump, where a contact isn't working. While working on it, I kept the armatures organized so each would go back to its original spot. I'm thinking now it might be better to mix them up, so the worn spots on the board and armature contacts won't align, and instead make contact at "fresh" areas.

Ed


Re: Stan Griffiths

Morris Odell
 

I never met Stan personally but have his book and also had email and snail mail communications with him. He was a real gentleman, a fount of knowledge and very helpful.

RIP.

Morris Odell VK3DOC in Melbourne Australia


Re: Stan Griffiths

Mlynch001
 

Well Stated!
--
Michael Lynch
Dardanelle, AR


Re: Guernsey Island 2445

Charlie Conger
 

I do not but do remember this being discussed several times. My experience was from 1980-2011. It seemed that most of the instruments followed the letter manufacturing convention you show above in 1988.
As far as correlation between units manufactured in various locations I am not aware of any system.


Re: Stan Griffiths

 

Stan may have been a friend of Tektronix but he didn't trust the Tektronix Corporation. As the co-founder of the vintageTEK Museum he was adamant there be no connection to the corporation at all. Stan wanted to be free to show the things they got wrong, the things they were embarrassed about, and even some things they wanted to suppress.
It is my guess that he was concerned about things the corporation began to do in the late 1980s when they lost their way, began losing money, saw their market share shrinking, and decided they could no longer afford their reputation for excellence. If that was the reason for mistrust then Stan was not alone. During this period Tek decisions were based on the recommendations of outside management consultants rather than their own staff of brilliant engineers. Many of Tek's most talented employees saw this as a time of great upheaval and left when they saw the handwriting on the wall

Dennis Tillman W7PF.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of John Williams
Sent: Thursday, January 30, 2020 2:00 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Stan Griffiths

I normally don’t take much notice of silent keys, as long as it is not me. However, in the case of Stan Griffiths, I must say is am truly saddened. Stan, along with Deanne Kidd and a few others, was truly a friend of Tektronix. He saw the engineering beauty in every product. I think he tried to save them all and to provide assistance to those of us who were also trying. Bye Stan thank you for who you were and all you did. I regret not knowing you better.





--
Dennis Tillman W7PF
TekScopes Moderator


Re: Did something happen to Yahoo Groups Today?

 

Hi Richard,
I never left Yahoo TekScopes but I haven't gotten any messages from Yahoo TekScopes members who don't know we moved to Groups.io. They would still be sending them to the Yahoo TekScopes.
As the moderator I do receive notices that people want to join it and notices that people left it but that is all.
Are you receiving regular posts to Yahoo TekScopes?
Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Richard Knoppow
Sent: Thursday, January 30, 2020 12:56 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Did something happen to Yahoo Groups Today?

I disagree with this as policy. My mail client will accept messages from either Yahoo or GIO, the filter will route them into the same folder. I do not post using Yahoo but want to see what messages may come from it. As long as I don't get spam I will leave the account alone. At some point, if I don't get any messages from Yahoo for an extended period I will unsubscribe there. Otherwise it sort of vanishes of itself.

On 1/30/2020 9:54 AM, redarlington wrote:
This message just prompted me to go in and leave the yahoo group.
Yahoo is dead. It'll be a little while before they figure it out but
I'm pulling out of all my 100 or so groups there now.
-Bob
--
Richard Knoppow
dickburk@...
WB6KBL






--
Dennis Tillman W7PF
TekScopes Moderator


Re: TDS784C

Ragnar S
 

Hi Amir,

You can build them for any library with the old NI 488 API, like the NI drivers, linux-gpib, and probably several others.
It is the library that must have support for the interface you are using, the programs are just using a very simple API to the library.

I happened to use those programs with:
- A Raspberry Pi
- The linux distribution Raspbian
- A 82357B GPIB-USB interface
- The linux GPIB library “linux-glib, which has support for many interfaces including 82357B.

Another guy use them with:
- A Mac with MacOS
- National Instrument’s libraries/drivers
- A National Instrument GPIB-USB interface

Many other combinations are possible of course.

The compiled binaries for DOS/Windows that you can find on eevblog are almost always built for the National Instruments library, and as far as I know the NI Library only support NI interfaces, I guess that is why the told you that.

Regards,

Ragnar

On 30 Jan 2020, at 14:39, amirb <@amirb> wrote:

Ragnar,

So, you mean the tools you posted on github here do work with Agilent 82357B? like the tekfwtool, etc...
Because everything I have seen about these tools whether here or on eevblog point to NI GPIB-USB
and people say they dont work with 82357B.
NI GPIB is too expensive but my cheap 82357B clone works perfectly for me.

On Tue, Jan 28, 2020 at 10:01 PM, Ragnar S wrote:



Hi all,

There is some calibration data in the EEPROMs on the acquisition board, but
also in the NVRAMs on the CPU board.

I have been told that you should never swap acquisition boards between scopes
without also moving the NVRAM contents.
Also, there are indications that there is calibration data that not even the
field service calibration data will update, that was written at the factory.

You are right that the NVRAMs are also used for storing waveforms, settings
and other stuff.

If you care about your scope I would _absolutely_ recommend backing up your
NVRAMs and your EEPROMs.

There are some DOS programs build for National Instruments GPIB drivers,
mainly tekfwtool and getcaldata, as well as the floppy based tools that John
pointed out, tdsNvramFloppyTool, that also has a Java program that can verify
the checksums of your dumps.

Both ways of getting your EEPROMs and the NVRAMs are a bit fragile, so I would
recommend using two separate methods, or at least do it twice, and check that
there is no difference between the results.
Sadly there always is a difference in the first bytes of the NVRAM dumps,
because that is where there real time clock is mapped (in the DS1486).

Since I had no National Instruments GPIB interface around (but an Agilent USB
one), and no DOS machine (but linux and unix machines), I did the little work
it took to make them compile clean on Linux, on a Raspberry Pi in my case,
fixed some simple makefiles and made a collection of the tools. Another guy
wanted to run them on a Mac, which was trivial to fix as well, so I added that
too.

You can find my collection here:
https://github.com/ragges/tektools

Best regards,

Ragnar

On 28 Jan 2020, at 18:23, Stephen Hanselman <kc4sw.io@...> wrote:

Speaking only from experience with TDS 540x, yes the calibration is kept on
the acquisition PCA. I think, but have not taken the time to prove, that the
primary use of the NVRAM is to store trace data. Everyone of the NVRAMs I
have read seem to have a pile of "empty" space in them along with a bit of
stuff relating to options, date, time, and the like.

Just as easily though I could be FoS.

Steve

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Siggi
Sent: Tuesday, January 28, 2020 7:05 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] TDS784C

On Tue, Jan 28, 2020 at 8:39 AM JJ <jajustin@...> wrote:

You need to be concerned with the NVRAM chips - DS1486 clock chip and
the DS1650/DS1250. They have internal batteries that hold the
calibration constants and options info.
It's my understanding that the calibration constants are stored in EEPROM on
the acquisition board. There's no reason to worry about the options, as it's
easy enough to restore those with GPIB or other means.






Re: Did something happen to Yahoo Groups Today?

Richard Knoppow
 

I disagree with this as policy. My mail client will accept messages from either Yahoo or GIO, the filter will route them into the same folder. I do not post using Yahoo but want to see what messages may come from it. As long as I don't get spam I will leave the account alone. At some point, if I don't get any messages from Yahoo for an extended period I will unsubscribe there. Otherwise it sort of vanishes of itself.

On 1/30/2020 9:54 AM, redarlington wrote:
This message just prompted me to go in and leave the yahoo group. Yahoo is
dead. It'll be a little while before they figure it out but I'm pulling out
of all my 100 or so groups there now.
-Bob
--
Richard Knoppow
dickburk@...
WB6KBL


Re: 5111 Storage Scope Loss of -30VDC

Mlynch001
 

I believe that the "stuff" is a sealer of some sort that TEK used on many of their flush socket units. I see this on many of the newer TM5XX plug ins as well as many scopes that use those soldered into the board pin sockets.


--
Michael Lynch
Dardanelle, AR


Re: Did something happen to Yahoo Groups Today?

redarlington
 

This message just prompted me to go in and leave the yahoo group. Yahoo is
dead. It'll be a little while before they figure it out but I'm pulling out
of all my 100 or so groups there now.
-Bob

On Wed, Jan 29, 2020 at 8:04 PM Dennis Tillman W7PF <@Dennis_Tillman_W7pF>
wrote:

For what it's worth I am still the administrator of the Yahoo TekScopes
Group.
About 1 or 2 times a week I get a notice that someone wants to join the
Yahoo TekScopes group and I redirect them to us.

I also receive a notice whenever someone leaves the Yahoo TekScopes group.
Normally there are a few of them per week.
But yesterday I got 11 of them within 2 hours which is extremely unusual.

Is anyone aware of something that happened on Yahoo that would explain
this?

Dennis Tillman W7PF




Re: Stan Griffiths

Abc Xyz
 

Very Very Sad. Sincere Condolences to all Family and Friends.

On Wed, Jan 29, 2020, 10:03 PM Dennis Tillman W7PF <@Dennis_Tillman_W7pF>
wrote:

I'm sorry to inform everyone that Stan Griffiths W7NI passed away Tuesday
night at 00:30.
Dennis Tillman W7PF




Re: Final Accounting for your Contributions to TekScopes

 

Hi Dave,
I'm not alone in thinking your nom de plume is hysterical.
Dennis

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Dave Voorhis
Sent: Thursday, January 30, 2020 7:29 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Final Accounting for your Contributions to TekScopes

Armchair Airlines Computer Services Inc. is me!

It started out as just Armchair Airlines in the early 1980's, a videogame software company that I co-founded. Perfect name for a videogame company, isn't it? :-)

Games is a hard way to make a living, so we turned into a business software company in the late 80's. We also made and sold one game, a business simulation as an adjunct to a highschool textbook. It was apparently somewhat successful, but for various reasons we never got any royalties.

It kept me and some colleagues gainfully employed all through the 90's, then I retired from it in the early 2000's but kept the name.

Now it's just me.

On Thu, Jan 30, 2020 at 6:49 AM Dennis Tillman W7PF <@Dennis_Tillman_W7pF>
wrote:

... The most amusing organization to make a contribution was Armchair
Airlines Computer Services Inc. Is every seat in their fleet of planes
a lounge chair? Why can't other airlines do this?





--
Dennis Tillman W7PF
TekScopes Moderator


Re: Final Accounting for your Contributions to TekScopes

Reginald Beardsley
 

It is fantastic! I haven't laughed so hard in ages.


Re: AWG2005/2020/2021/2041 Parts?

Mlynch001
 

On Tue, Jan 28, 2020 at 05:40 AM, Mlynch001 wrote:


Does anyone in the group have any spares for the AWG2005/2020/2021/2041 Series
Waveform Generators?

Specifically:

Low Voltage Power Supply 620-0058-02 or 620-0065-00

Or

FPP Board (A7) Option 09 671-3179-00

Looking for either or both that are in need of a good home.

In addition: If someone has a Low Voltage Power Supply Schematic for this
unit, which they could share, that would be excellent. I would like to try to
attempt to repair the LVPS in this unit if possible.
--
Michael Lynch
Dardanelle, AR
All:

I found a power supply.

Still looking for the FPP Board (A7) 671-3179-00

Also, now looking for a copy of the Performance Verification Software disc that was an optional item on this unit.

AWG2005 P/N 063-1706-00

There was a Yahoo Groups Member who had this software years ago. Dan T, but I do not see him as active. Last post found in my recent search was 2008.

Any help would be appreciated.

--
Michael Lynch
Dardanelle, AR


Re: 56 pins (TM500/5000 and 5000 series scope plug-ins) and 76 pins (7000 series scope plug-ins) connectors

John Griessen
 

On 1/30/20 9:41 AM, Ke-Fong Lin wrote:
Where did you get your slot pattern?
From the official Tek product.


Re: 56 pins (TM500/5000 and 5000 series scope plug-ins) and 76 pins (7000 series scope plug-ins) connectors

Ke-Fong Lin
 

Hi John,

Where did you get your slot pattern?
It is same as 067-0645-02 which is the "official" TM500 extender from Tektronix (see photo and docs TekWiki).
However, the "TM500 rear interface data book" mentions a slot between 22-23 (for TR-502) is not present in either of the connectors.
Simplest would be to put slots between all "signal" pins.

Best regards,


Re: Final Accounting for your Contributions to TekScopes

Dave Voorhis
 

Armchair Airlines Computer Services Inc. is me!

It started out as just Armchair Airlines in the early 1980's, a videogame
software company that I co-founded. Perfect name for a videogame company,
isn't it? :-)

Games is a hard way to make a living, so we turned into a business software
company in the late 80's. We also made and sold one game, a business
simulation as an adjunct to a highschool textbook. It was apparently
somewhat successful, but for various reasons we never got any royalties.

It kept me and some colleagues gainfully employed all through the 90's,
then I retired from it in the early 2000's but kept the name.

Now it's just me.

On Thu, Jan 30, 2020 at 6:49 AM Dennis Tillman W7PF <@Dennis_Tillman_W7pF>
wrote:

... The most amusing organization to make a
contribution was Armchair Airlines Computer Services Inc. Is every seat in
their fleet of planes a lounge chair? Why can't other airlines do this?


Re: 5111 Storage Scope Loss of -30VDC

Bob Wilson
 

I found my problem and now its working.
No, I did not ask how it sat unused for that long. He says he has another one that he has been using.
I like the big screen and its fine for my audio work.

Now I would like to get some of my other scopes working. A 5110 with no HV and a 453 that blows a fuse after working a short while.
I'm giving up on 900 series. I have 4 of them that all work but not correctly. I used to like them but I think they were not built to the high standards of the other models.
Bob


Re: TDS784C Programming Manual Needed

Tom Bowers
 

Steve,

I have a TDS684x (can't remember if it is a B or C) and it has always been
very finicky with floppy disks. I have learned to format a disk in the
scope and if it passes, then it is usable to extract hard copy files. If I
attempt to format a floppy in any other machine, the TDS684 won't accept
the disk. I've never tried to write a file on another machine and then read
it with the scope since I only use the disk drive for output of images into
other documents.

Tom Bowers

On Thu, Jan 30, 2020 at 5:43 AM Steve Hendrix <SteveHx@...>
wrote:

I finally managed to get my new-to-me TDS784C into a working position
on my bench, and it looks really sweet, all the options I hoped for
seem to be there. I'm having a bit of difficulty getting it to accept
a floppy, but I may need to hunt up a different one as this one has
been rejected by another instrument as well. I am able to talk to it
via GPIB using my KISS-488, and it responds perfectly to standard
SCPI commands (*IDN? etc.). However, I can't find the programming
manual that would define the full command set such as screen capture.
Googling has turned up a wealth of manuals, from rack mount
instructions (a whole manual?) all the way down to very detailed
service manuals and the supplemental SCPI commands to access some of
the fancy waveform envelope features, but I can't find the basic SCPI
command set. There also appears to be some form a Basic etc. that can
be used via the floppy disk. Can anyone point me to the programmer's
manual for this very nice unit?

Steve Hendrix





Re: Stan Griffiths

Mlynch001
 

It is a sad day for all of us. I did not know Stan personally, but I have read some of his work and heard many stories of his knowledge and his generosity. We have all been touched by him in some way and are blessed to have known him. Prayers for those closest to him in this time of loss.

--
Michael Lynch
Dardanelle, AR