Date   

Re: Tektronix P6202 FET voltage probe tip problem

GeorgeP
 

And for the advice about adding links!


Re: Tektronix P6202 FET voltage probe tip problem

GeorgeP
 

Wow! Good ideas! Thank you for the thoughts Harvey! Will report back.


Re: Tektronix P6202 FET voltage probe tip problem

Harvey White
 

On Mon, 15 Apr 2019 06:19:18 -0700, you wrote:

I have added three more close ups of the tip socket in the Photos folder here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I don't think I can link to a pic that I've posted.
Go to the picture you've posted, open it in your browser. In the
address field of the browser window (which changes to where you are),
select and highlight the complete address.

Go back to your email and paste that in.

That's one way to do it.

I am new again to Tekscopes. I don't know how. But you will find almost 20 good pics of a P6202 Fet probe that will hopefully help me or someone else in future deal with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is probably hard soldered in a jig. Likely the socket is closed at the bottom to prevent wicking.
These sockets are indeed closed at the bottom. They're meant to be
put into a PC board and soldered in to lower the profile of whatever
chip (or part) is inserted into them.


The small teflon? washer is slightly loose on the body of the socket but doesn't come off. I can see what I think is the FET and a couple of surface mount resistors? one of which is adjacent to the solder pad for the tip socket.
The teflon washer is likely meant to keep the probe tip from grounding
out against the outer probe body.


Pics show an object, probably a broken off piece of wire, round in a square hole. Too small and too deep to grab.

I don't know how to deal with this.
One would be to replace the socket.

Another would be to remove the socket, go to a room without much in
it, grasp the socket firmly (but gently) with pliers, and then bang
the pliers sharply against a block of wood. If the obstruction goes
away, you're lucky.

A question is to ask if you are sure that the socket is obstructed. It
has to have a set of contacts in it. Take a sewing needle or pin of
the right diameter (I measured 0.030 on the tip of my P6202), and see
if it is obstructed. The needle should bottom out gently.

if a simulated probe tip fits in, there may not be an obstruction. I'm
rather puzzled how something could break inside the socket. I've seen
many broken tips, but they all die at the junction of the external tip
and the replaceable body.

If you can't clear it out, and you're willing to take a chance, I have
a few sockets that a probe tip will slide into. You'd have to be
willing to remove the socket and replace it, though.

Harvey






Re: 7S12 with S-4 and S-53 troubleshooting

Albert Otten
 

Hi Nenad,

I did, I uploaded a photo here:
https://groups.io/g/TekScopes/photo/89504/0?p=Created,,,20,2,0,0
this was taken with SCAN at approx. 21h position, so that "Morse code" could be seen.
Your photo reminded me of a modification I made in my 7S12. See here and surrounding messages:
https://groups.io/g/TekScopes/message/96331
I'm not sure your "morse code" problem is related to it and also not whether it's related to the unit not showing waveforms.

W.r.t. sensitivity for DC input (did you try?) I forgot that the setting of S901 "Correction Memory Switch", see page 2-5, is important. For now the best way is to set the switch in the rear (OFF) position (as long as you don't have a pulse generator head).
Here is one more attempt to show that the preamplifier responds to the strobe pulses.
With a DMM attached to the front panel Vertical Out connector you can see that Memory is slowly drifting when no strobe pulses are generated. You can set the S-53 for free running when Level is roughly midway and Stability cw, and stop and start free running by slight rotation of the Level knob. You don't need any signal for this and you can try it at different Offset levels. During free running the DMM will reflect the vertical position of the visible trace, and will listen to variations in Offset. When you turn off free running, the trace gets blanked but the DMM still shows the trace position. You will see the DMM reading slowly drifting away in some direction. When you turn free running on again, the DMM reading will immediately jump back to the normal value. The trace should reappear immediately at the previous vertical position. If you don't want to wait for drift you can change Offset while free running is off; the trace should immediately be at the new position when you turn free running on again.

Albert


Re: Tektronix P6202 FET voltage probe tip problem

Siggi
 

On Mon, Apr 15, 2019 at 9:19 AM GeorgeP <george@ffwdm.com> wrote:

I have added three more close ups of the tip socket in the Photos folder
here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I
don't think I can link to a pic that I've posted. I am new again to
Tekscopes. I don't know how. But you will find almost 20 good pics of a
P6202 Fet probe that will hopefully help me or someone else in future deal
with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is
probably hard soldered in a jig. Likely the socket is closed at the bottom
to prevent wicking. The small teflon? washer is slightly loose on the body
of the socket but doesn't come off. I can see what I think is the FET and a
couple of surface mount resistors? one of which is adjacent to the solder
pad for the tip socket.

Pics show an object, probably a broken off piece of wire, round in a
square hole. Too small and too deep to grab.

I don't know how to deal with this.





Re: Tektronix P6202 FET voltage probe tip problem

GeorgeP
 

I have added three more close ups of the tip socket in the Photos folder here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I don't think I can link to a pic that I've posted. I am new again to Tekscopes. I don't know how. But you will find almost 20 good pics of a P6202 Fet probe that will hopefully help me or someone else in future deal with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is probably hard soldered in a jig. Likely the socket is closed at the bottom to prevent wicking. The small teflon? washer is slightly loose on the body of the socket but doesn't come off. I can see what I think is the FET and a couple of surface mount resistors? one of which is adjacent to the solder pad for the tip socket.

Pics show an object, probably a broken off piece of wire, round in a square hole. Too small and too deep to grab.

I don't know how to deal with this.


Re: Old Tektronix Books

Adrian
 

Well, The copy I ordered did actually arrive in the UK today, clearly not the one in the photo but nice condition albeit without the dust jacket.

It's the 3rd printing 1966 and, from writing on the flyleaf was previously owned by a 'James Brey on Jan 15, 1968' and subsequently by a 'David Cambell' - It would be neat if they are anywhere around here!

On 3/29/2019 10:07 PM, Daniel Koller via Groups.Io wrote:
TODAY, after a couple of us bought books, and all I did was refresh the screen:


Amazon:  liars, cheaters,... statisticians!!
  Dan
p.s.  Let's see who actually receive the books they ordered.  Three or more of us requested them.   Until one of us actually receives a book, we have to assume there are*none* out there.   Once one of two of us get books, we can then*know* there are none out there!

On Friday, March 29, 2019, 5:39:03 PM EDT, Adrian<Adrian@nicol1.org.uk> wrote:
I might be a culprit too just got the only copy of “oscilloscopes”  I could see on Ebay which from the photo was the same one that was listed on Amazon and a couple of other sellers google found. I already have a copy of Stan’s book.

Adrian
Sent from an I-thingy


Re: Time for an inventory or size really does matter

Dave Seiter
 

Speaking of basement shops- last summer I went to a local garage sale in a house that was built around the turn of the (last) century.  It had lots of "old house weirdness", but the strangest thing were the joists under house: riveted steel girders!  The basement was fairly large and there were only two center supports.  The ceiling height would have been about nine feet.  I'd never seen anything like that before.
-Dave

On Sunday, April 14, 2019, 8:26:13 AM PDT, Chuck Harris <cfharris@erols.com> wrote:

In the usual basement shop, with a ceiling full of exposed
floor joists, it is easy to install lift points between the
joists, using 2x4 framing hangers, and short sections of iron
pipe.  Then you use a come-a-long to give the heavy instrument
some altitude.  Don't stand underneath it!

That is how I put my machines on their bench stands, and how
I got my fluke HV AC calibration amplifier, all 140lbs, in its
rack.

Consumer grade block and tackle sets have too much friction to
be of much use.  To effectively use a block and tackle, it needs
to have ball bearings in its pulley sheaves.

-Chuck Harris

Harvey White wrote:
On Sun, 14 Apr 2019 06:29:59 +0000 (UTC), you wrote:

Yeah; ;-)  except dollies can't lift from the top.  My hand truck gets a lot of use...
Hmmm, swing out arm with a block and tackle?

Harvey



-Dave
    On Saturday, April 13, 2019, 7:25:45 AM PDT, Harvey White <madyn@dragonworks.info> wrote:

On Fri, 12 Apr 2019 23:44:32 +0000 (UTC), you wrote:

A buddy of mine has one, and it works really well- I think he's gotten away with lifting 700lbs with it.
I have an air powered hoist rated at 300, which is all I'd put my garage roof through without extra support (I've done 900lbs with a chain hoist and supports).  What I really need is a hoist that folds up, doesn't have long extensions, fits through a narrow door way, has large wheels so it works over grass/dirt/transitions, can lift via a table or sling, and can handle anything form a scope to a pallet of scopes...  we can dream...
Part of this sounds like a refrigerator dolly....

Harvey


Re: Need a 366-1258-00 knob for a 7T11...

 

You are in luck :) I have a 7T11 spares mule with the main timing knob intact - it is yours for the cost of postage.

Would you like me to check out the cost of postage from UK to US?

David

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Chuck Harris
Sent: 14 April 2019 18:07
To: TekScopes
Subject: [TekScopes] Need a 366-1258-00 knob for a 7T11...

Hi, I have a 7T11 that had its red variable timing knob
in the outward position when a heavy instrument was set
down next to it, shearing off the knob on its panel. The
red knob is scuffed, but otherwise fine, its shaft has been
fixed, but the grey timing knob was destroyed most
thoroughly... I haven't even got a single piece.

Does anybody have a knob for this plugin? As far as I can
tell, its timing knob was not used on anything else from tek.

Its part number is: 366-1258-00

Thanks!

-Chuck Harris


Re: Quality probe hook tips

Glydeck
 

The SKU is sufficient.

https://www.newark.com/tektronix/013010708/hook-tip-retractable-black/dp/92B2441?ost=013010708&;ddkey=https%3Aen-US%2FElement14_US%2Fsearch

On Apr 14, 2019, at 4:02 PM, Vern VanZ via Groups.Io <n7gtb=yahoo.com@groups.io> wrote:

...sorry for the way that came through [or didn't]...I had attempted to include a link to Newark's page, but perhaps sku number will be enough to get you to the correct page...
Vern.

On Sunday, April 14, 2019, 3:58:16 PM PDT, Vern VanZ via Groups.Io <n7gtb=yahoo.com@groups.io> wrote:

Looks like Newark sells them, though likely a bit pricier than epay: 013010708 - Test Accessory, Retractable Hook Tip

|
|
|
| | |

|

|
|
| |
013010708 - Test Accessory, Retractable Hook Tip

Accessory Type:Retractable Hook Tip; For Use With:Tek P3010, P6048, P60XX, P60XXB, P60XXB, P61XX/A, P612X, P61XX...
|

|

|



There are other suppliers I'm sure, but this is one that popped up on a quick search. No idea if the fit would be better or worse.

Regards,
Vern - N7GTB

On Sunday, April 14, 2019, 3:02:05 PM PDT, Brendan via Groups.Io <the_infinite_penguin=yahoo.com@groups.io> wrote:

Does anyone know a good place to get probe hook tips? I bought two sets off of epray (not the cheapest offered) and out of the 10 tips only 2 or 3 fit snugly the rest fall off. These are for P6106A and P6063B if that matters.

Brendan







Re: More Complete List of Concept Series and Measurements Concepts Books

hardyhansendk
 

Hi David
I think its only if you wish to upload---not download.
Hardy

-----Oprindelig meddelelse-----
Fra: TekScopes@groups.io [mailto:TekScopes@groups.io] På vegne af David C.
Partridge
Sendt: 14. april 2019 11:26
Til: TekScopes@groups.io
Emne: Re: [TekScopes] More Complete List of Concept Series and Measurements
Concepts Books

TekWiki < http://w140.com/tekwiki/wiki/File:062-053.pdf>;

At the bottom there's a bit that says "Pages that link to this page" and a
highlighted link "Manuals" which takes me to a list of manuals.

When I click a pdf filename I get the complaint to which I referred.

D.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Dave
Daniel
Sent: 14 April 2019 01:51
To: TekScopes@groups.io
Subject: Re: [TekScopes] More Complete List of Concept Series and
Measurements Concepts Books

Which website

Sent from a small flat thingy

On Apr 13, 2019, at 19:45, David C. Partridge
<david.partridge@perdrix.co.uk> wrote:

Hmmm when I go back to the manuals page and try to click on any of the pdf
files for that manual or other manuals, I get a page that says:

Login required
Please login to upload files

Dave

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Soren
Jorvang
Sent: 13 April 2019 14:52
To: TekScopes@groups.io
Subject: Re: [TekScopes] More Complete List of Concept Series and
Measurements Concepts Books

On 13 Apr 2019, at 14.58, Chuck Lippmeier <chuck@lippmeier.com> wrote:
I also have a Tek book named, "Semiconductor Diodes and Transistors
Programmed Instruction Volume I Basics", Tek Pub 062-0053-00. Printings
in
1963, 66, 67 & 68. Inside it mentions that there is also a Volume II
"Diode
Devices". Volume I is the most in depth study of semiconductor physics
I've
ever seen. That's saying something since I have a BS in electronics. I'd
very much like to own/read other "Programmed Instruction" Tek books
(especially Vol 2 and any volumes in this series) but this is the only
one
I've ever seen.
http://w140.com/tekwiki/wiki/File:062-053.pdf

Also, http://w140.com/tekwiki/wiki/Concepts_Series


--
Soren











---
Denne mail er kontrolleret for vira af AVG.
http://www.avg.com


Re: More Complete List of Concept Series and Measurements Concepts Books

 

Hi Russ,
What is your post referring to? It is very frustrating to have to guess.
Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Russ Ramirez
Sent: Sunday, April 14, 2019 9:55 AM
Subject: Re: [TekScopes] More Complete List of Concept Series and
Measurements Concepts Books

How about this page David?

Russ



--
Dennis Tillman W7PF
TekScopes Moderator


Re: More Complete List of Concept Series and Measurements Concepts Books

 

Hi Roy,
What site is being referred to?

It makes it much easier if we don't have to guess what your reply refers to.
By now there have been at least 50+ posts on this topic.

PLEASE include some context so we understand which of the 50+ posts your reply relates to.

So far I have not had problems logging into the TekWiki links mentioned and the Czech web site so what site has the login requirement?

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Roy
Thistle
Sent: Sunday, April 14, 2019 10:37 AM
Subject: Re: [TekScopes] More Complete List of Concept Series and
Measurements Concepts Books

On Sat, Apr 13, 2019 at 09:25 AM, Dave Daniel wrote:


Does anyone know who the owner of this site is?
Hi:
I've seen that question asked on the forum before. IMHO, if people keep
asking, the site will soon disappear... like others, that were once up,
have.
Regards.



--
Dennis Tillman W7PF
TekScopes Moderator


Re: Quality probe hook tips

Vern VanZ <n7gtb@...>
 

...sorry for the way that came through [or didn't]...I had attempted to include a link to Newark's page, but perhaps sku number will be enough to get you to the correct page...
Vern.

On Sunday, April 14, 2019, 3:58:16 PM PDT, Vern VanZ via Groups.Io <n7gtb=yahoo.com@groups.io> wrote:

Looks like Newark sells them, though likely a bit pricier than epay:  013010708 - Test Accessory, Retractable Hook Tip

|
|
|
|  |  |

|

|
|
|  |
013010708 - Test Accessory, Retractable Hook Tip

Accessory Type:Retractable Hook Tip; For Use With:Tek P3010, P6048, P60XX, P60XXB, P60XXB, P61XX/A, P612X, P61XX...
|

|

|



There are other suppliers I'm sure, but this is one that popped up on a quick search.  No idea if the fit would be better or worse.

Regards,
Vern - N7GTB

    On Sunday, April 14, 2019, 3:02:05 PM PDT, Brendan via Groups.Io <the_infinite_penguin=yahoo.com@groups.io> wrote:

Does anyone know a good place to get probe hook tips? I bought two sets off of epray (not the cheapest offered) and out of the 10  tips only 2 or 3 fit snugly the rest fall off. These are for P6106A and P6063B if that matters.

Brendan


Re: Quality probe hook tips

Vern VanZ <n7gtb@...>
 

Looks like Newark sells them, though likely a bit pricier than epay:  013010708 - Test Accessory, Retractable Hook Tip

|
|
|
| | |

|

|
|
| |
013010708 - Test Accessory, Retractable Hook Tip

Accessory Type:Retractable Hook Tip; For Use With:Tek P3010, P6048, P60XX, P60XXB, P60XXB, P61XX/A, P612X, P61XX...
|

|

|



There are other suppliers I'm sure, but this is one that popped up on a quick search.  No idea if the fit would be better or worse.

Regards,
Vern - N7GTB

On Sunday, April 14, 2019, 3:02:05 PM PDT, Brendan via Groups.Io <the_infinite_penguin=yahoo.com@groups.io> wrote:

Does anyone know a good place to get probe hook tips? I bought two sets off of epray (not the cheapest offered) and out of the 10  tips only 2 or 3 fit snugly the rest fall off. These are for P6106A and P6063B if that matters.

Brendan


Re: Need a 366-1258-00 knob for a 7T11...

 

Hi Chuck,
That is going to be a long shot.
Try Sphere Research and vintageTEK.
https://www.sphere.bc.ca/test/index.html
https://vintagetek.org/

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Chuck Harris
Sent: Sunday, April 14, 2019 10:07 AM
Subject: [TekScopes] Need a 366-1258-00 knob for a 7T11...

Hi, I have a 7T11 that had its red variable timing knob in the outward
position when a heavy instrument was set down next to it, shearing off
the knob on its panel. The red knob is scuffed, but otherwise fine, its
shaft has been fixed, but the grey timing knob was destroyed most
thoroughly... I haven't even got a single piece.

Does anybody have a knob for this plugin? As far as I can tell, its
timing knob was not used on anything else from tek.

Its part number is: 366-1258-00

Thanks!

-Chuck Harris



--
Dennis Tillman W7PF
TekScopes Moderator


Re: Complete List of Concept Series and Measurements Concepts Books

 

Hi Dave,
It was the Transducers Book that Tek excerpted the last two chapters and appendices into a separate "booklet". I think the booklet was intended to be a sort of application note on the use of transducers.
It was not the strain gauge book which I was not even aware of. I still suspect that the contents of the Strain Gauge book became a key part of the Transducers book.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Dave Daniel
Sent: Saturday, April 13, 2019 9:14 AM
Subject: Re: [TekScopes] Complete List of Concept Series and
Measurements Concepts Books

Dennis,

The concepts books (more of a pamphlet) about strain gauges is only 72
pages, so I would be surprised to learn that it was split into two
separate books.

I would NOT be surprised to find that it was expanded and then became
one or both of the "Transducers" books.

DaveD


On 4/12/2019 6:38 PM, Dennis Tillman W7PF wrote:
Hi Bob,

I forgot to mention that, unless I am mistaken, the Strain Gauge book
was actually split into two books and renamed. The thick book is called
"Transducer Measurements" and the thin book is called "Transducer
Applications Handbook".

Also, "Oscilloscope Cathode-Ray Tubes" was renamed "Cathode-Ray
Tubes".

Dennis Tillman W7PF

-----Original Message-----
From: redarlington
Sent: Friday, April 12, 2019 2:54 PM
Subject: Complete List of Concept Series and Measurements Concepts
Books

And the one on strain gages...

On Fri, Apr 12, 2019 at 3:46 PM redarlington via Groups.Io
<rdarlington= gmail.com@groups.io> wrote:

Actually, it's missing more than those. Right away I noticed 062-
0861-01
(Storage Cathode-Ray Tubes and Circuits) as well as 062-0852-01
(Oscilloscope Cathode-Ray Tubes) was missing.

-Bob





--
Dennis Tillman W7PF
TekScopes Moderator


Re: 7S12 with S-4 and S-53 troubleshooting

Nenad Filipovic
 

Hi Albert, thanks for your help and effort.

There could be interference with Readout blanking of the trace. First of
all try with Readout turned off please.
I did, I uploaded a photo here:
https://groups.io/g/TekScopes/photo/89504/0?p=Created,,,20,2,0,0
this was taken with SCAN at approx. 21h position, so that "Morse code"
could be seen.

If you set the range multiplier to long (X10) you might see the trace
move up and down when you rotate Time-Distance.
No effect. On X10 setting the whole trace gets a bit brighter. At X1 and
X.1 it's the same. Time/div has no effect on the trace.

You could also remove the cable to the S-53 input and set the S-53 for
free running.
I did not even know that S-53 could do a free run. But indeed I can get the
free running trace by setting STABILITY fully CW and LEVEL to the side
where +/- switch is set to. The trace is identical to what I get when
triggering.

My current aim is to confirm whether this 7S12 behaves as it should, good
or bad sampling head.

Best Regards, Nenad


Quality probe hook tips

Brendan
 

Does anyone know a good place to get probe hook tips? I bought two sets off of epray (not the cheapest offered) and out of the 10 tips only 2 or 3 fit snugly the rest fall off. These are for P6106A and P6063B if that matters.

Brendan


Re: 7S12 with S-4 and S-53 troubleshooting

Albert Otten
 


You won't see a signal from the preamplifier when there are no input
changes between sample moments
So if 7S12 is not "processing" the trigger from S-53, then S-4 may always
be sampling the "same" spot in time, hence no signal (if I understood this
correctly).
Hi Nenad,

This is not what I meant. After each sampling event the 7S12 memory and vertical screen position are updated to reflect the new input signal voltage. At the same time the whole sampling gate circuitry voltage values are updated such that the bridge follows the input signal voltage. If at the next sampling event the input signal is still the same then the bridge voltages remain the same. When the input signal changed meanwhile then a new correction to the bridge voltage is needed. This will happen because the preamplifier detects the change in the form of a short pulse sent to the 7S12 for further processing. The pulse gets larger when the input change is larger, for instance at the jumps of a square wave. In many applications the horizontal dot distance is short enough to show a smooth trace at the screen. Then the separate corrections in vertical distance are very small.
There is much more explanation in the 7S11 manual. The time base 7T11(A) is much more complicated than the time base counterpart of the 7S12. The 7T11(A) can also do random sampling.

Albert

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