Re: some way to get alternating display of two different sweep rates on a 7904A?
Independent sweep speeds easy with the 7844 dual beam scope :)
John
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On 4/12/2019 7:37 PM, John Williams wrote: This is exactly what the 547 does. It has a well-engineered diode switch that transfers from one sweep to the alternate one. I have tried to duplicate this for a dual sweep scope like the 535/545 series but have been unsuccessful. I don’t know of any setting or easy way to accomplish this but one of the 7000 series experts may. I would like to know too.
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Re: CORRECTED Complete List of Concept Series and Measurement Concepts Books
It is a subsection. It seems like they were trying to make an application
note out of that part of the main book.
I included it for completeness.
By the way I don't have the Strain Gauge book either. I have seen the Strain
Gauge Transducer plugin for the 500 series scopes back in the 1960s in the
lab I worked in at the time. Since Tek never did a 7000 version I assume the
strain gauge plugin didn't sell well.
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Craig Sawyers
Sent: Friday, April 12, 2019 10:56 PM
To: [email protected]
Subject: Re: [TekScopes] CORRECTED Complete List of Concept Series and
Measurement Concepts Books
I incorporated the additional books I missed I included ALL of the
authors.
This is the CORRECTED complete list.
Dennis Tillman W7PF Dang. I thought I had the lot - and now I realise I'm two short!
062-0710-00 Measurements Concepts Strain Gauge Measurements Concepts
(Les
Hurlock)
062-1246-02 Measurement Concepts Transducer Applications Handbook
(Reprint
of Ch. 5, Ch. 6, Glossary, and Appendices of "Transducer Measurements")
Although from what you say this looks like it is a subsection of
Transducer Measurements, which I have.
Craig
-- Dennis Tillman W7PF TekScopes Moderator
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Re: 577 Curve tracer ringing CRT and noisy step generator
Hi Wilson,
First, It looks like you are AC Coupled. Switch to DC so the waveform will be clearer.
It appears the spikes are occurring at random places in the steps. Since the collector voltage is just rectified AC from the power line, the base steps have to be synchronized to the 60Hz as well. If the spikes are being caused by anything at all in the power supply the spikes would occur at the same point in each of the steps. But these spikes occur at different places in the steps so the cause is not in the power supply.
I suggest you do two things:
1) Work backwards in the base step generator circuit until you find the point where the spikes on the steps first show up. The cause will be at that point in the schematic.
2) try varying the front panel controls that might cause the spikes to change in some way. Hopefully if you can get that to happen it will give you a clue where to look in the schematic. Some suggestions for what to change and report the results you observe when you do:
* Do the steps move around each time your scope sweep triggers again? or do they repeat exactly like this every time?
* What happens if you reduce the number of steps by 1 each time. Do the spikes change or move somewhere else?
* What happens if you increase or decrease the STEP AMPLITUDE.
* What happens if you turn the STEP AMPLITUDE knob to the Voltage steps
* What happens when you switch the step rate to all three settings: SLOW, NORM, and FAST?
* What happens when you change the STEP/OFFSET POLARITY from NORMAL to INVERT.
* What happens when you add or subtract offset to the steps.
All of these things may give us the clue we need to finally figure out what is causing this.
Dennis Tillman W7PF
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
wilson2115@...
Sent: Friday, April 12, 2019 8:36 PM
Subject: Re: [TekScopes] 577 Curve tracer ringing CRT and noisy step
generator
/g/TekScopes/photo/86536/0?p=Created,,,20,2,0,0
Probing the base to emitter on the test fixture, notice the spikes -- Dennis Tillman W7PF TekScopes Moderator
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Re: CORRECTED Complete List of Concept Series and Measurement Concepts Books
I incorporated the additional books I missed
I included ALL of the authors.
This is the CORRECTED complete list.
Dennis Tillman W7PF Dang. I thought I had the lot - and now I realise I'm two short! 062-0710-00 Measurements Concepts Strain Gauge Measurements Concepts (Les Hurlock) 062-1246-02 Measurement Concepts Transducer Applications Handbook (Reprint of Ch. 5, Ch. 6, Glossary, and Appendices of "Transducer Measurements") Although from what you say this looks like it is a subsection of Transducer Measurements, which I have. Craig
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Re: 577 Curve tracer ringing CRT and noisy step generator
Hi Wilson,
That shouldn't be! I have had at least 5 or 6 577s and none of them made any noise at all under any circumstances.
Dennis Tillman W7PF
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-----Original Message-----
From: wilson2115@...
Sent: Friday, April 12, 2019 7:45 PM
Subject: 577 Curve tracer ringing CRT and noisy step
generator
<snip> I find it interesting at 0 collector voltage the CRT makes a noticeable
metal like whine as if some internal metal plates are actually
resonating -- Dennis Tillman W7PF TekScopes Moderator
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Re: Complete List of Concept Series and Measurements Concepts Books
062-0710-00
-Bob
Good heavens - I haven't seen that in any of the Concepts series lists. Now I'm paranoid - I haven't got it! Craig
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Re: some way to get alternating display of two different sweep rates on a 7904A?
Hi John,
This seems like a simple thing to do and since I know how much you know
about Tek scopes I must be missing something. Can you be much more specific
about what you want:
* In your ideal configuration what plugins would you be using and what slots
would they be in?
* What signal in the A vert do you want to go to what timebase in what
horizontal slot?
* What signal in the B Vert do you want to go to what timebase in the other
horiz slot?
* What signal do you want to trigger each timebase off of?
In the setup section of the 7904A manual they explain the 20 possible
vertical and horizontal mode combinations. It starts on pg 2-11 of the 7904A
manual.
Dennis Tillman W7PF
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-----Original Message-----
From: John Griessen
Sent: Friday, April 12, 2019 6:19 PM
Subject: [TekScopes] some way to get alternating display of two
different sweep rates on a 7904A?
Is some way to get alternating display of two different sweep rates on
a 7904A?
I fiddled with a 7904A and 7A19 7A26 7B71 7B92A and seemed to get
crossed controls -- left vert with b horiz and R vert with A horiz.
Then found mention of "independent pairs operation". I'm going to be
digging for that in the manual.
Meanwhile does anyone have some hints for getting one sweep at 200
us/div and one at 200 ns/div? -- Dennis Tillman W7PF TekScopes Moderator
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Re: 577 Curve tracer ringing CRT and noisy step generator
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Re: 577 Curve tracer ringing CRT and noisy step generator
I recently replaced all the IC sockets on the mainboard and after the repair my results are still the same which is a good thing as I didn't break anything.
I found by reducing the output z trim the noisy step generator is reduced but not eliminated.
I plan on replacing all the IC's I haven't replaced before on the mainboard.
I find it interesting at 0 collector voltage the CRT makes a noticeable metal like whine as if some internal metal plates are actually resonating
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Re: some way to get alternating display of two different sweep rates on a 7904A?
This is exactly what the 547 does. It has a well-engineered diode switch that transfers from one sweep to the alternate one. I have tried to duplicate this for a dual sweep scope like the 535/545 series but have been unsuccessful. I don’t know of any setting or easy way to accomplish this but one of the 7000 series experts may. I would like to know too.
|
7A19 has zero output on some steps
After these needing a treatment with bond paper to polish gold contacts, remove dust?
Any other hints about this plugin?
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some way to get alternating display of two different sweep rates on a 7904A?
Is some way to get alternating display of two different sweep rates on a 7904A?
I fiddled with a 7904A and 7A19 7A26 7B71 7B92A and seemed to get crossed controls -- left vert with b horiz
and R vert with A horiz. Then found mention of "independent pairs operation". I'm going to be digging for that in the manual.
Meanwhile does anyone have some hints for getting one sweep at 200 us/div and one at 200 ns/div?
|
CORRECTED Complete List of Concept Series and Measurement Concepts Books
I incorporated the additional books I missed
I included ALL of the authors.
This is the CORRECTED complete list.
I included the one manuscript that was never published. It doesn't have a
part number.
I will ask Kurt Rosenfeld to publish this manuscript.
TEKTRONIX MEASUREMENT CONCEPTS AND CIRCUIT CONCEPTS SERIES BOOKS
062-0710-00 Measurements Concepts Strain Gauge Measurements Concepts (Les
Hurlock)
062-0852-00 Circuit Concept Series Cathode Ray Tubes (Chuck DeVere),
formerly Oscilloscope Cathode Ray Tubes (no author)
062-0861-01 Circuit Concept Series Storage Cathode-Ray Tubes and Circuits
(Chuck Devere)
062-0888-00 Circuit Concept Series Power Supply Circuits (Kenneth Arthur,
Contributions by John Thompson)
062-0955-00 Circuit Concept Series Television Waveform Processing Circuits
(Gerald E. Eastman)
062-1005-00 Measurement Concepts Information Display Concepts (Nick
Stadtfeld)
062-1009-00 Measurement Concepts Semiconductor Devices (John Mulvey,
Contributions by John Tomlin, Lee Miles, and Ed Smith)
062-1030-00 Circuit Concept Series Digital Concepts (Leonard W. Bell)
062-1055-00 Circuit Concept Series Spectrum Analyzer Circuits (Morris
Engelson)
062-1056-00 Circuit Concept Series Oscilloscope Trigger Circuits (Harold
Magee)
062-1064-00 Measurement Concepts Television Systems Measurements (Gerald
A. Eastman)
062-1070-00 Measurement Concepts Spectrum Analyzer Measurements (Dan
Welch)
062-1074-00 Measurement Concepts Engine Analysis Measurements (Jim Thurman
Illustrated by Dick Wilson)
062-1098-00 Circuit Concept Series Sweep Generator Circuits (Kenneth A.
Kinman, Contributions by Max Brown)
062-1106-00 Measurement Concepts Automated Testing Systems (Leonard W.
Bell)
062-1120-00 Measurement Concepts Probe Measurements (Walter E. McAbel)
062-1144-00 Circuit Concept Series Horizontal Amplifier Circuits (Kenneth
Arthur)
062-1145-00 Circuit Concept Series Vertical Amplifier Circuits (Bob Orwiler)
062-1146-00 Circuit Concept Series Oscilloscope Probe Circuits (Joe Weber)
062-1172-00 Circuit Concept Series Sampling Oscilloscope Circuits (John
Mulvey, Contributions by Al Zimmerman, Joe Weber, John Bookout)
062-1180-00 Circuit Concept Series Real Time O'scope 7 Vol. Set (-0852,
-0888, -1056, -1098, - 1144, -1145, -1146)
062-1244-00 Measurement Concepts Time-Domain Reflectometry Measurements
(James H. Strickland, Contributions by H. Allen Zimmerman, Gordon Long &
George Frye)
062-1246-00 Measurement Concepts Transducer Measurements (Kenneth Arthur,
Contributions by William H. (Bill) Verhoef)
062-1246-02 Measurement Concepts Transducer Applications Handbook (Reprint
of Ch. 5, Ch. 6, Glossary, and Appendices of "Transducer Measurements")
062-1247-00 Measurement Concepts Biophysical Measurements (Peter Strong,
Contributions by Dorothy Freed)
062-1334-00 Measurement Concepts Spectrum Analyzer Measurements, Theory
and Practice (Morris Engleson)
062-1460-00 Circuit Concept Series Oscilloscope Camera Concepts (Will Marsh,
Contributions by Maurice J. Merrick and Ben A. Buisman)
Unpublished The Physiology, History and Concepts of
Electrocardiography (Walter A. Peterson)
Dennis Tillman W7PF
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Re: More Complete List of Concept Series and Measurements Concepts Books
You are correct. I saw it listed elsewhere with Oscilloscope in front but now I'm looking at the cover. It's just Cathode-Ray Tubes. On Fri, Apr 12, 2019 at 5:11 PM Dennis Tillman W7PF <dennis@...> wrote: Yikes, that's embarrassing! Both of them are on my shelf with all the
others. If only I did a simple count of the books on my shelf I would have
caught my error. I have no idea how I forgot to put them in the list.
I believe what you called "Oscilloscope Cathode-Ray Tubes" is actually
"Cathode Ray Tubes".
Dennis Tillman W7PF
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
redarlington
Sent: Friday, April 12, 2019 2:46 PM
To: [email protected]
Subject: Re: [TekScopes] Complete List of Concept Series and
Measurements Concepts Books
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
On Fri, Apr 12, 2019 at 3:42 PM Craig Sawyers <c.sawyers@tech-
enterprise.com>
wrote:
This is the complete list of the Concept Series and Measurements Concepts Books
Dennis Tillman W7PF Hi Dennis
The list is missing two:
062-0861-01 Storage Cathode-Ray Tubes and Circuits Chuck Devere
062-0955-00 Television Waveform Processing Circuits Gerald E.
Eastman
I'm sure that was just an omission from your comprehensive list ;-)
I'm missing one that was on yours though
062-1246-02 Measurement Concepts Transducer Applications Handbook
I have the -00 but not the -02Craig
--
Dennis Tillman W7PF
TekScopes Moderator
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Re: Time for an inventory or size really does matter
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...
When I last moved one of my 19" racks (full), I had to lay strips of plywood and masonite across the back yard- that wasn't a fun move!
-Dave
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On Friday, April 12, 2019, 11:15:20 AM PDT, Michael A. Terrell <terrell.michael.a@...> wrote:
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7S12 with S-4 and S-53 troubleshooting
Hi Everyone,
This is my first and only piece of sampling equipment, and I can't get it
to work. What I get is a flat trace with just some minor noise on it.
I connected the same signal (10MHz <1Vpp) to both heads inputs just for
test (let's just ignore this blasphemy for now since both inputs are 50Ohm,
and I don't have a S-6). S-53 triggers, I can see the tiny short trigger
pulses from the front connector on another scope. The trace appears only
after S-53 triggers, so I'd say that part works. DC offset also works, and
Volt/div setting increases noise on the trace with higher sensitivity, so I
figure the vertical block of the 7S12 is OK.
So the main suspect is the S-4, but I have no idea how to troubleshoot it.
I can see the tiny sampling pulses being fed to it by 7S12, but nothing
"notable" on the preamp output on pin 4. The manual says not to test the
sampling bridge diodes using an ohmmeter, but a curve tracer. How could an
ohmmeter (actually DMM, <1mA test current) be more destructive to these
diodes than a curve tracer? (provided that the test is carried out using
forward bias only). How to test the snap-diode? Is there any other
extra-sensitive component I should be aware of?
Best Regards and thanks,
Nenad
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More Complete List of Concept Series and Measurements Concepts Books
Yikes, that's embarrassing! Both of them are on my shelf with all the others. If only I did a simple count of the books on my shelf I would have caught my error. I have no idea how I forgot to put them in the list.
I believe what you called "Oscilloscope Cathode-Ray Tubes" is actually "Cathode Ray Tubes".
Dennis Tillman W7PF
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
redarlington
Sent: Friday, April 12, 2019 2:46 PM
To: [email protected]
Subject: Re: [TekScopes] Complete List of Concept Series and
Measurements Concepts Books
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
On Fri, Apr 12, 2019 at 3:42 PM Craig Sawyers <c.sawyers@tech-
enterprise.com>
wrote:
This is the complete list of the Concept Series and Measurements Concepts Books
Dennis Tillman W7PF Hi Dennis
The list is missing two:
062-0861-01 Storage Cathode-Ray Tubes and Circuits Chuck Devere
062-0955-00 Television Waveform Processing Circuits Gerald E.
Eastman
I'm sure that was just an omission from your comprehensive list ;-)
I'm missing one that was on yours though
062-1246-02 Measurement Concepts Transducer Applications Handbook
I have the -00 but not the -02Craig
-- Dennis Tillman W7PF TekScopes Moderator
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Re: Complete List of Concept Series and Measurements Concepts Books
Hey, no worries on this end. I apologize about the one I mentioned that was already covered (my bad for not actually checking the number). And if what you just said about it being split is true, then that's great. I have the two! I just don't have the funky orange one. I used to do a LOT of strange (strain) gaging, but just the physical application on many, many, many different materials. I don't actually know much about bridge circuits and measurements. Just how to stick em to stuff reliably in the air, under water, in vacuum conditions, corrosive environments, etc. Thanks! -Bob On Fri, Apr 12, 2019 at 4:43 PM Dennis Tillman W7PF <dennis@...> wrote: Hi Bob,
Yikes again. Now I'm really embarrassed.
I did a really sloppy job with this list.
You are absolutely right, there is a Strain Gauge book. I had no idea. It
is odd that the cover doesn't match the others but there is no doubt it is
part of the series.
I will issue a correct version of the list in a minute.
Red faced Dennis Tillman W7PF
-----Original Message-----
From: redarlington
Sent: Friday, April 12, 2019 3:06 PM
Subject: Re: [TekScopes] Complete List of Concept Series and
Measurements Concepts Books
062-0710-00
-Bob
On Fri, Apr 12, 2019 at 4:01 PM Craig Sawyers <c.sawyers@tech-
enterprise.com>
wrote:
And the one on strain gages... There isn't one of those in the concepts series.
Craig
--
Dennis Tillman W7PF
TekScopes Moderator
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Re: Tek 577 IC socket repair
|
Re: Complete List of Concept Series and Measurements Concepts Books
Hi Bob,
Yikes again. Now I'm really embarrassed.
I did a really sloppy job with this list.
You are absolutely right, there is a Strain Gauge book. I had no idea. It is odd that the cover doesn't match the others but there is no doubt it is part of the series.
I will issue a correct version of the list in a minute.
Red faced Dennis Tillman W7PF
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-----Original Message-----
From: redarlington
Sent: Friday, April 12, 2019 3:06 PM
Subject: Re: [TekScopes] Complete List of Concept Series and
Measurements Concepts Books
062-0710-00
-Bob
On Fri, Apr 12, 2019 at 4:01 PM Craig Sawyers <c.sawyers@tech-
enterprise.com>
wrote:
And the one on strain gages... There isn't one of those in the concepts series.
Craig
-- Dennis Tillman W7PF TekScopes Moderator
|
John Williams
redarlington