Date   

Re: Allowing attachments

EJP
 

I'd like to point out that *everyone* opposing attachments is:
1) making specious arguments that do not reflect the current state of affairs
I'd like to point out that this in itself is a 'specious argument' that does not 'reflect the current state of affairs'. There are numerous valid arguments advanced here, and I have advanced a couple myself.

EJP


Tektronix 576 Curve Tracer - on auction

battyhugh
 

https://www.go-dove.com/asset/5/18948. Tektronix Type 576 Curve Tracer

https://www.go-dove.com/category/index?categoryId=293&;categoryName=Electronic+Manufacturing+Equipment&results=results&utm_campaign=Electronic+Manufacturing+Equipment&utm_medium=email&_hsmi=88085676&_hsenc=p2ANqtz--_E0KGUTxTQOHwi_Y36GSsw5hxdHBmK6vEMqraaZELLh9Jf1lNNEsckMclVZG-DE__DOC1XcXRsxF3KZBC-SLbk3sSAg&utm_content=88085676&utm_source=hs_email&pn=44&so=desc&sf=currentbid&ps=20

sorry about the link - but it should work - there are 2 available - (plus lots more if you look).


Re: what is this

Dave Casey
 

While certainly not common, these things aren't that mysterious; they're in
the catalogs toward the back.

The 1-series carrying case is part number 437-0065-00 (see 1969 catalog
page 374 for a picture, it's still listed in 1977 but no photo).
I have a 3-wide 7k storage case that one of my 7L18s came in. It is part
number 016-0626-00.
The 2-wide is 016-0625-00. (Both are listed in the 1985 catalog on page
461).

Dave Casey

On Tue, May 19, 2020 at 1:04 AM Dennis Tillman W7pF <dennis@ridesoft.com>
wrote:

Hi SnapDiode,

Tek made these for, among other things, their sales engineers to use when
carrying a plugin to a customer's site.
Tek made them for many of their products.
They are extremely rare.
None of mine have part numbers on them.
At the highest levels of Tek I 'm sure someone in charge of having these
made understood the importance of making a good first impression. As a Tek
field engineer was arriving at a customer's offices or about to begin a
demonstration these carrying cases communicated the professionalism and
excellence that Tek applied to all of their products.
I have two double wide carrying cases for 7000 plugins and I also have a
triple wide 7000 carrying case. I have yet to find a single wide 7000
carrying case.
I also have a single wide carrying case for TM500 plugins.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
snapdiode via groups.io
Sent: Monday, May 18, 2020 9:45 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] what is this

Thanks, does it have a part number? I don't see this case in
"Oscilloscopes Selecting and Restoring a Classic", or on tekwiki.
Was it a Tektronix part or third party?





--
Dennis Tillman W7PF
TekScopes Moderator




Re: what is this

 

Hi SnapDiode,

Tek made these for, among other things, their sales engineers to use when carrying a plugin to a customer's site.
Tek made them for many of their products.
They are extremely rare.
None of mine have part numbers on them.
At the highest levels of Tek I 'm sure someone in charge of having these made understood the importance of making a good first impression. As a Tek field engineer was arriving at a customer's offices or about to begin a demonstration these carrying cases communicated the professionalism and excellence that Tek applied to all of their products.
I have two double wide carrying cases for 7000 plugins and I also have a triple wide 7000 carrying case. I have yet to find a single wide 7000 carrying case.
I also have a single wide carrying case for TM500 plugins.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of snapdiode via groups.io
Sent: Monday, May 18, 2020 9:45 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] what is this

Thanks, does it have a part number? I don't see this case in "Oscilloscopes Selecting and Restoring a Classic", or on tekwiki.
Was it a Tektronix part or third party?





--
Dennis Tillman W7PF
TekScopes Moderator


Readout pulsing at timebase rate

John Parkins G8KVP
 

Hi All.

Turns out my ghosting of the readout onto the trace is more involved
than I thought.

My 200Mhz 2445B (serial B062351) has a problem with the readout
display. It is pulsing at the same rate as the timebase sweep. At high
frequencies of course this isn't a problem but at lower speeds it gets
a bit annoying. I have the service manual and I have some idea where
to start looking but just wondered if anyone had seen this before and
could help out.

The only error I get is TEST 02 FAIL 53 not at startup but if I go
into the diagnostics. As far as I can see though this tells me I have
a stuck Delta t button, but that doesn't seem to be the case. I have
checked all the voltages and they are all spot on.

Thanks.




--
Best regards,
John mailto:john@g8kvp.com


Re: what is this

momemeca
 

None of mine have a traditional Tektronix name/model plate.
Beyond owning and using them I do not know much about who manufactured it ...etc.
They do, however, feature the traditional Tektronix metalwork style, feel and colour (of course).
Perhaps Chuck could shed some light on its provenance?

Cheers,
Rick

On 19 May 2020, at 14:44, snapdiode via groups.io <snapdiode=yahoo.com@groups.io> wrote:

Thanks, does it have a part number? I don't see this case in "Oscilloscopes Selecting and Restoring a Classic", or on tekwiki.
Was it a Tektronix part or third party?



Re: what is this

snapdiode
 

Thanks, does it have a part number? I don't see this case in "Oscilloscopes Selecting and Restoring a Classic", or on tekwiki.
Was it a Tektronix part or third party?


Re: Understanding drawings done using text characters

victor.silva
 

Chuck's drawing could have been done on a napkin, probably in 1/10 the time.
Taken a picture with a smartphone and added as an attachment to his post.
Perfect example of the use of attachments, something to clarify the message at hand but probably doesn't belong in the pictures folder because it's only germane to the attached message.

--Victor


Re: what is this

momemeca
 

This is a standard carry / shipping / storage case which could be used for any "standard" 500-series plug-ins.
These are just cases, therefore not powered ...etc. The later versions have a "nutsert" on the lower rear panel which allows the plug-in to be securely fastened using the existing thumbscrew on the front panel.
I have three or four in my Tektronix collection to store the most delicate plug-ins when not in use.
Hope this helps :-)

Cheers,

Rick
Melbourne (AUS)

On 19 May 2020, at 11:39, snapdiode via groups.io <snapdiode=yahoo.com@groups.io> wrote:

https://www.ebay.ca/itm/Vintage-Tektronix-Type-1S1-Wide-Band-Sampling-Unit-for-500-Series-Oscilloscope/264639700752?hash=item3d9dc15f10:g:xn0AAOSw5WReTGq7

We see the 1S1 in a stylish metal carrying case. Never seen that before.



what is this

snapdiode
 


Understanding drawings done using text characters

 

On Friday 5/15/2020 2:39PM in "Looking for a better in circuit ESR meter"
Chuck Harris posted a "text sketch" of an Engineer's ESR Meter. The text
sketch format created a lot confusion, left all but a few of you scratching
your heads, and required a flurry of follow-up posts to explain what was
meant by Chuck's sketch. Text sketches are a very simple method of drawing
using ASCII characters and a fixed-space font that probably originated on
Teletypes almost 100 years ago.

I'll bet most of the initial confusion was due to our members reading our
posts in a proportional font. First, you must display a text sketch in a
fixed space font like Courier or it is meaningless. Next, it helps
enormously if you know what each symbol means until you become literate at
reading these text sketches.

I created this key for your sketch which clarifies the meaning or purpose of
each symbol Chuck used. I recommend that everyone take a minute to display
Chuck's original text sketch (which I included below) in Courier font and
refer to my key to understand it.

Symbol Key for Chuck Harris' Engineer's ESR Meter
* This OS is an oscilloscope
* This FUNC is a Function Generator
* This O) is a BNC Connector (a capital O followed by a closed
parenthesis)
* This ==== is coax cable (a row of equal signs)
* This /// is a ground (three slashes in a row)
* This @ is a junction (the at symbol)
* This .. is a place holder symbol (a row of periods) to keep
everything lined up
* This | is a vertical wire or a lead for a component (the
vertical bar symbol)

Here is Chuck's original text sketch:
......................................
FUNC o)=======@.......................
......|.......|.......................
......|......10K......................
......|.......|.......................
OS...o)=======@============@===========> To cap
......|....................|..........
......|................. DIODE........
......|..................CLAMP.......@=>
......|....................|.........|
.....///..................///.......///

Dennis Tillman W7pF


Re: 7854 Bad display board

Paul
 

I've searched the entire ROM image, and 6D8F is not in the ROM. Where are
you reading this value? It also makes no sense as an address, since it is odd,
and all memory access is on even addresses.
Right - that sounds like a set-up error on my part. I didn't think I even have the 0 bit set up in that group, but I must have made a mistake. I'm looking at addresses now, since I've only got 16 channels of pods.

If you are not seeing the above sequence of address fetches, then there is
something very wrong, or perhaps you are not clocking your LA on the
correct clock phase (remember, there are 4 distinct phases of the 3 MHz
CPU clock generated by U920).
I was clocking on the 3rd or 4th phase, as those are what's on the edge connector

You will need a 36 channel (or more) LA to fully see what the CPU is doing.
Yeah, I'm thinking this 338 is the wrong tool for the job. Time to level up to something more substantial.

In any case, I encourage you to address the PUP circuit first.
Good call, will do.

BTW, is there a program listing or disassembly somewhere that you were referring to, or are you just intimately familiar with this beast?
thanks again!
Paul


Off topic & Images attached

 

I think the only really bad part about off-topic posts (off topi in terms of NOT being Tek directly related) is that these threads go on forever with THE WRONG & TOTALLY MISLEADING TITLE. say what you want to say if you think it's valuable to others, but please,FIX THE TITLE so we know what you are talking about, how hard can that be for everybody?

I am conflicted over images attached, I see it in other groups, and it works fine, but we do address it in other ways that work, so I am not deeply wounded if we can't have them with messages directly. One bad aspect is that cellphones take very large images, so that casual attachment can be 2.4Mb for a knob picture, while I can edit one down to be 24Kb. I do think the laziness factor will make people careless with storage space and file size, but on the other hand sometimes it really helps to see a picture to understand the topic of the post, and frankly searching for specific images is no delight even on groups.io.

anyway, just my thoughts, I am Ok whichever direction we go image wise , but I am tired of posts hijacked into five different and unrelated topics, all with the same now totally irrelevant title.
all the best,
walter
sphere research corp.


New ESR meter Group on Groups.io

Roy Thistle
 

Hi All:
I created a new Groups.io group: It's at:
https://groups.io/g/ESR-Meters-North/topics
If anyone wants to have the group please Sure. No problem, just PM me.
If anyone wants to create a Groups.io group called "ESR-Meters," then please do. (I added the suffix "North," well because I'm not in CONUS, and I am in the North... and because that makes the more germane name "ESR-Meters" available.)
It's not searchable yet on Google. etl al., but, It's Groups.io approved, and, so it's up on Groups.io
Best regards and wishes all.
Roy


Re: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

David DiGiacomo
 

On Mon, May 18, 2020 at 11:59 AM Chuck Harris <cfharris@erols.com> wrote:
How can we discuss repair, without discussing the repair techniques, and
equipment used in repair?
I honestly don't see the problem. I would just say something like:

"Check the power supply capacitors for ESR. A detailed discussion of
ESR measurement is off topic for TekScopes, but please see the
discussion here in <some other place where it's appropriate>."

There were a lot of steps that I took in designing a winding machine, and
experimenting on making new transformers for the 547 scopes that were discussed
on tekscopes2. Off topic steps, that could have gotten me banned by Dunn
from tekscopes...
In fact, that's why I don't read TekScopes2. Why would you need to
turn TekScopes into a copy of it?

My point is you can never know what good will come out of trash discussions that
you think at the time to be wasted bandwidth. The wasted bandwidth is just a
few salty tears in the sea.
I don't think anyone is talking about wasted bandwidth. The issue is
low SNR due to too many off topic posts.

This group is most useful in its interaction between those with questions, and
those with answers. Those that look at this interchange from the outside are
just going to have to invest their own time in sorting things out to meet their
needs.
I am glad this is just your opinion, and not the TekScopes policy,
because I feel that I am already investing enough time sorting out the
off topic posts. Personally, I wish Dennis would be more strict, but
I appreciate his efforts to compromise in order to provide the
greatest Tektronix group for the greatest number.

P.S. I think if you looked up "thankless job" in the dictionary you
would see "TekScopes moderator" as the first example. So Dennis,
thanks for carefully considering
this issue and the attachments issue, for explaining your thoughts in
detail, and in general for all the time and effort you put into
TekScopes. (Oh, and thanks also for setting a good example of tact
and patience, which I obviously still need to work on.)


Re: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

Mlynch001
 

Chuck,

Well stated!

Thank you.

--
Michael Lynch
Dardanelle, AR


Re: Allowing attachments

Jim Ford
 

No, not lazy, Chuck, we are efficient in our use of personal time and energy!  Said by the guy who is using his smartphone instead of waiting for his laptop computer to boot up...Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Chuck Harris <cfharris@erols.com> Date: 5/18/20 11:11 AM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Allowing attachments Indeed,But I make it a point to never go to my groups.io web account.And, I never read the email account I use for groups on my cellphone...And, I never use the groups.io site on my cell phone...So, absent a way of me emailing a picture, or attachment to thegroup's file section, it is unlikely that I will do the steps youdescribe...For instance, if I want to put a picture in the record, I have toshoot it with my cell phone, or camera, and get it to my desktopmachine (email it, or transfer it on a CF or SD card), and thendownload it into my pictures directory, resize it, and then headoff to the groups.io account, and browse through all of my picturesto find the right one, and then snarffle it up...I am lazy, and I think others may be as well.-Chuck Harrissatbeginner wrote:> Nowadays it's only a few mouse clicks extra to> > Put the images (relevant to a new or sny topic) in an new TekScopes album, > > Copy & paste the link to that album into your TekScopes message and all is ok:> > The images are there for those who want to see them, no forced bandwidth usage;> > The link between topic discussion and relevant images is preserved;> > The images themselves are saved for the future;> > Sounds like problem solved?> > Just my 2 cents,> > Leo> > > >


Re: Allowing attachments

Chuck Harris
 

Indeed,

But I make it a point to never go to my groups.io web account.

And, I never read the email account I use for groups on my cell
phone...

And, I never use the groups.io site on my cell phone...

So, absent a way of me emailing a picture, or attachment to the
group's file section, it is unlikely that I will do the steps you
describe...

For instance, if I want to put a picture in the record, I have to
shoot it with my cell phone, or camera, and get it to my desktop
machine (email it, or transfer it on a CF or SD card), and then
download it into my pictures directory, resize it, and then head
off to the groups.io account, and browse through all of my pictures
to find the right one, and then snarffle it up...

I am lazy, and I think others may be as well.

-Chuck Harris

satbeginner wrote:

Nowadays it's only a few mouse clicks extra to

Put the images (relevant to a new or sny topic) in an new TekScopes album,

Copy & paste the link to that album into your TekScopes message and all is ok:

The images are there for those who want to see them, no forced bandwidth usage;

The link between topic discussion and relevant images is preserved;

The images themselves are saved for the future;

Sounds like problem solved?

Just my 2 cents,

Leo




Re: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

Chuck Harris
 

Hi Dennis,

"All about classic Tektronix test equipment, its use, repair, and collecting."
How can we discuss repair, without discussing the repair techniques, and
equipment used in repair?

I can see the membership getting miffed if we broke off onto a tangent, and
started discussing the shutdown for COVID, and its political implications,
but that is not what we are doing.

We are discussing "...use, repair, and collecting of tektronix test equipment."

In the process of discussing these things, it is usually necessary to take
diversions, to clarify our meanings, show our thinking on how we got to our
repair, or failed repair... and, sometimes, the diversion is just something
that came to mind as the result of the discussion.

We are Humans, we want to be social and communicate; so, we do.

There were a lot of steps that I took in designing a winding machine, and
experimenting on making new transformers for the 547 scopes that were discussed
on tekscopes2. Off topic steps, that could have gotten me banned by Dunn
from tekscopes...

My point is you can never know what good will come out of trash discussions that
you think at the time to be wasted bandwidth. The wasted bandwidth is just a
few salty tears in the sea.

We have connected ESR to tektronix in a whole bunch of organic ways. You may
think the discussion is irrelevant to the group, but you might also learn the
method you use to fix your next errant scope.

I learned about the usefulness of ESR meters in some similar discussion many,
many, years ago either here, or on the HP group... I bought an ESR meter that
was recommended by a group member at that time, and I can tell you without any
question, or reservation that ESR meters have saved me a whole lot of time!

This group is most useful in its interaction between those with questions, and
those with answers. Those that look at this interchange from the outside are
just going to have to invest their own time in sorting things out to meet their
needs.

That is not my responsibility.

We are all adults here. We can be trusted, in as far as it is necessary to
trust us, not to poorly spend the pennies our discourses cost the world.

-Chuck Harris

PS, think about all of the things tektronix made in making our scopes. Think
about all of the subjects *they* discussed in becoming the premiere company they
were. Have we really digressed all that much from that which is tektronix?

Shipping peanuts!


Re: Allowing attachments

 

FWIW - I don't favour allowing attachments.

David

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Richard in Edenton NC via groups.io
Sent: 18 May 2020 16:09
To: TekScopes@groups.io
Subject: Re: [TekScopes] Allowing attachments

I agree to allowing attachments to emails to the group. I set my settings to 100k so I only get smaller size attachments unless I choose to see them depending on the topic.

73 Richard W4MCD

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