Re: More Complete List of Concept Series and Measurements Concepts Books
Yep.
Mouse over the links; a "blue" link will resolve directly to the PDF. A "red" link resolves to the login page, which indicates that the file is not yet ready to be accessed.
I don't know why the latter is true, but apparently that's the way it currently works.
DaveD
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On 4/14/2019 5:40 AM, Dave Voorhis wrote: Looks like the manuals linked in blue are downloadable. The ones in red appear not to have been uploaded yet.
On 14 Apr 2019, at 10:26, David C. Partridge <david.partridge@...> wrote:
TekWiki < >
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: [email protected] <mailto:[email protected]> [mailto:[email protected] <mailto:[email protected]>] On Behalf Of Dave
Daniel
Sent: 14 April 2019 01:51
To: [email protected] <mailto:[email protected]>
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@...> 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
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Re: some way to get alternating display of two different sweep rates on a 7904A?
On 4/14/19 5:51 AM, Albert Otten wrote: It works fine when you use 2 time bases and horizontal ALT. Yes, I got good results following the manual sec 2 p 5-7 -- like this: Before that screenshot, I had trigger problems with one time base, and I cleaned card edge contacts and was then able to get triggering with the first two time bases.
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Re: 7S12 with S-4 and S-53 troubleshooting
Thank you all for your advice, I just tested the sampling gate of my S-4 and believe it's good. Since I don't have a curve tracer, I improvised one using a 7854, 7A26 and 7A22 driven by a triangle ramp from FG504 (-5V to +5V, as the S-4 instruction manual says, 1.5k¦¸ for current limiting). I took some fiddling to get accurate measurements, I uploaded everything to: /g/TekScopes/files/S-4%20sampling%20gate%20diode%20test%20measurementsThere are 4 sets of measurements: 01 - forward bias of both diode groups, 1mA/div vertical scale (1¦¸ current sensing resistor), 2Hz triangle ramp frequency 02 - reverse bias of individual diodes, 10¦ÌA/div (1¦¸ current sensing resistor), 2Hz triangle ramp frequency 03 - reverse bias of individual diodes, 1¦ÌA/div (10¦¸ current sensing resistor), 2Hz triangle ramp frequency 04 - reverse bias of individual diodes, 1¦ÌA/div (100¦¸ current sensing resistor), 0.02Hz triangle ramp frequency Measurements 01 and 04 are valid (with minor offset errors), the rest may be interesting for the curious. Measurement 02 showed that diodes C and D are different from the rest, having a lower forward bias resistance. Measurement 03 is with higher vertical sensitivity, and it showed notable hysteresis in the reverse bias region of diodes C and D (what is shown is the positive slope of the ramp). Reducing the frequency from 2Hz to 0.02Hz eliminated the hysteresis (never would have thought that reverse recovery could be so slow, but yet its <1¦ÌA we're looking at here) and increasing the current sensing resistor to reduce hum/interference led to measurement 04. The S-4 manual says "...vertical deflection factor of 0.001mA/div will probably include some hum loops..." and "any one diode that shows any discernible leakage is a cause to reject a whole Sampling Gate....". So if I'm to trust my measurements, I'd say this one is alive and well? :) I did not find any info on how to test the snap diode. Any suggestions? Best Regards, Nenad
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Re: some way to get alternating display of two different sweep rates on a 7904A?
It works fine when you use 2 time bases and horizontal ALT.
With just one time base it works the way I said. Then with AC triggering it works regardless the relative vertical position of the traces, but this is tricky. When you separate the traces further (with one of the Position knobs) then also both traces get dimmer: after a trace switch the AC trigger coupling needs time to settle to the new DC level. With sine wave input in stead of square wave you should also see a horizontal shift in trace trigger points to the top of the lower waveform and the bottom of the upper waveform think (I didn't try).
Albert
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On Sun, Apr 14, 2019 at 02:05 AM, John Griessen wrote:
On 4/13/19 3:59 PM, Albert Otten wrote:
Hi John,
Step 19 requires that the A time base can be triggered from both 7A plugins at one and the same trigger level. As you noted that was problematic and you
chose to set the level correct for the left 7A; hence the right 7A won't
trigger the time base; the sweeps stop unless you set AUTO.
Likely you use DC triggering. And you positioned the traces in the upper half and in the lower half, so at quite different DC levels and hence trigger
output levels. What happens when you move one trace up or down, or when set
the time base for AC triggering?
Instead of trying AC, I tried another scope and it works fine, and the lights
say right vert A, and left vert A when in ALT and
ALT. That gives tow traces with different time bases. Here's a photo:
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Re: More Complete List of Concept Series and Measurements Concepts Books
Looks like the manuals linked in blue are downloadable. The ones in red appear not to have been uploaded yet.
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On 14 Apr 2019, at 10:26, David C. Partridge <david.partridge@...> wrote:
TekWiki < >
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: [email protected] <mailto:[email protected]> [mailto:[email protected] <mailto:[email protected]>] On Behalf Of Dave
Daniel
Sent: 14 April 2019 01:51
To: [email protected] <mailto:[email protected]>
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@...> 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
|
Re: More Complete List of Concept Series and Measurements Concepts Books
TekWiki < >
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.
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Dave Daniel Sent: 14 April 2019 01:51 To: [email protected]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@...> 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: [email protected] [mailto:[email protected]] On Behalf Of Soren
Jorvang
Sent: 13 April 2019 14:52
To: [email protected]
Subject: Re: [TekScopes] More Complete List of Concept Series and
Measurements Concepts Books
On 13 Apr 2019, at 14.58, Chuck Lippmeier <chuck@...> 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.
Also,
--
Soren
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Documentation on and Accessoires for LV511.
Hi to All,
Acquired recently a LV511 System (Mainframe and Testhead). On this moment I'am looking for additional Documentation and Accessoires. I allready have its User Manual. The LV511 is in fact an "upgraded" DAS9200. A system I allready own and which is working flawlessy in combination with a simulated X-Windows Terminal.
Because of VintageTek Org Scanning Service (as a way to support them) I mailed them for the missing Documentation (with PN's). They confirmed the existence/availability of this Documentation and they will look for it. That was one month ago. A renewed request gives till now again no follow up. For me this is now a dead end (sorry to say). Therefore this request on TekScopes.
Greetings and in advance thank you for any help in this,
Egge Siert
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Re: Time for an inventory or size really does matter
Yeah; ;-)? except dollies can't lift from the top.? My hand truck gets a lot of use...
-Dave
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On Saturday, April 13, 2019, 7:25:45 AM PDT, Harvey White <madyn@...> 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 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
? ? On Friday, April 12, 2019, 11:15:20 AM PDT, Michael A. Terrell <terrell.michael.a@...> wrote:
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Re: More Complete List of Concept Series and Measurements Concepts Books
Which website
Sent from a small flat thingy
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On Apr 13, 2019, at 19:45, David C. Partridge <david.partridge@...> 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: [email protected] [mailto:[email protected]] On Behalf Of Soren
Jorvang
Sent: 13 April 2019 14:52
To: [email protected]
Subject: Re: [TekScopes] More Complete List of Concept Series and
Measurements Concepts Books
On 13 Apr 2019, at 14.58, Chuck Lippmeier <chuck@...> 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.
Also,
--
Soren
|
Re: 577 Curve tracer ringing CRT and noisy step generator
On 13 Apr 2019, at 23:30, wilson2115@... wrote: Dave
You mnetion your display filter doesn't appear to work, mine didn't appear to either. In the manual it stated when using the filter the rate of change must be very slow as I guess it takes time for the filter to react, I thought maybe from that its uses are limited and maybe helps with very low sensitivity. I will try playing around with the filter more and observe the results The Display Filter on mine causes the display to vertically shrink and distort. I suspect failure of one of the two diodes and/or capacitors in the filter.
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Re: some way to get alternating display of two different sweep rates on a 7904A?
On 4/13/19 3:59 PM, Albert Otten wrote: Hi John,
Step 19 requires that the A time base can be triggered from both 7A plugins at one and the same trigger level. As you noted that was problematic and you chose to set the level correct for the left 7A; hence the right 7A won't trigger the time base; the sweeps stop unless you set AUTO.
Likely you use DC triggering. And you positioned the traces in the upper half and in the lower half, so at quite different DC levels and hence trigger output levels. What happens when you move one trace up or down, or when set the time base for AC triggering? Instead of trying AC, I tried another scope and it works fine, and the lights say right vert A, and left vert A when in ALT and ALT. That gives tow traces with different time bases. Here's a photo:
|
Re: More Complete List of Concept Series and Measurements Concepts Books
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
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Soren Jorvang Sent: 13 April 2019 14:52 To: [email protected]Subject: Re: [TekScopes] More Complete List of Concept Series and Measurements Concepts Books On 13 Apr 2019, at 14.58, Chuck Lippmeier <chuck@...> 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. Also, -- Soren
|
Re: 577 Curve tracer ringing CRT and noisy step generator
Dave
You mnetion your display filter doesn't appear to work, mine didn't appear to either. In the manual it stated when using the filter the rate of change must be very slow as I guess it takes time for the filter to react, I thought maybe from that its uses are limited and maybe helps with very low sensitivity. I will try playing around with the filter more and observe the results
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Re: 577 Curve tracer ringing CRT and noisy step generator
I will look into this, probe around, and see where the break in the chain is. Thanks for the helpful replies
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Re: 577 Curve tracer ringing CRT and noisy step generator
Yes I have the D1 version and no it was not turned on. I have turned it on and it works however, thanks for the reply
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Re: some way to get alternating display of two different sweep rates on a 7904A?
Hi John,
Step 19 requires that the A time base can be triggered from both 7A plugins at one and the same trigger level. As you noted that was problematic and you chose to set the level correct for the left 7A; hence the right 7A won't trigger the time base; the sweeps stop unless you set AUTO.
Likely you use DC triggering. And you positioned the traces in the upper half and in the lower half, so at quite different DC levels and hence trigger output levels. What happens when you move one trace up or down, or when set the time base for AC triggering?
Albert
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On Sat, Apr 13, 2019 at 09:36 PM, John Griessen wrote:
I'm wanting to show 100X speed difference triggered off same signal's edge,
faster than chop allows,
so use vet mode ALT and horiz mode ALT.
I have these in slots left to right:
7A19, 7A26, 7B71, 7B92A
So far I find in the manual section 2 p 7 "slaved alternate" operation. I've
tested that my scope does that correctly
up to step 18 of prelim setup in
w140.com/Tektronix_7904A_OCRed_by_Tabalabs.pdf
Steps 15 16 17 18 are about vertical deflection system.
15 says connect calibrator to both L and R vertical amps, get a 2 div tall
signal displayed. (vert mode A was set)
16 notice only the pos knob of L amp affects trace. position trace to
upper half (yes)
17 set vert mode to Right. set R amp to display 2 div tall signal (yes,
requires changed A trigger level)
18 notice only the pos knob of R amp affects trace. position trace to lower
half (trace stops since A trig lvl different)
19 set vert mode to ALT, see two traces. (I only see one at a time unless
trig in auto)
in auto the rest of the steps match except the R vert trace is not triggered
-- it free runs with vert mode = Right.
Is the trigger used supposed to be with the vert mode chosen? If so, mine is
not using B trig with vert mode Right.
Checking another scope now. This 7904A, B010104, just came out of storage and
could be broken.
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Re: some way to get alternating display of two different sweep rates on a 7904A?
I'm wanting to show 100X speed difference triggered off same signal's edge, faster than chop allows,
so use vet mode ALT and horiz mode ALT.
I have these in slots left to right:
7A19, 7A26, 7B71, 7B92A
So far I find in the manual section 2 p 7 "slaved alternate" operation. I've tested that my scope does that correctly
up to step 18 of prelim setup in w140.com/Tektronix_7904A_OCRed_by_Tabalabs.pdf
Steps 15 16 17 18 are about vertical deflection system.
15 says connect calibrator to both L and R vertical amps, get a 2 div tall signal displayed. (vert mode A was set)
16 notice only the pos knob of L amp affects trace. position trace to upper half (yes)
17 set vert mode to Right. set R amp to display 2 div tall signal (yes, requires changed A trigger level)
18 notice only the pos knob of R amp affects trace. position trace to lower half (trace stops since A trig lvl different)
19 set vert mode to ALT, see two traces. (I only see one at a time unless trig in auto)
in auto the rest of the steps match except the R vert trace is not triggered -- it free runs with vert mode = Right.
Is the trigger used supposed to be with the vert mode chosen? If so, mine is not using B trig with vert mode Right.
Checking another scope now. This 7904A, B010104, just came out of storage and could be broken.
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Re: some way to get alternating display of two different sweep rates on a 7904A?
First, a disclaimer; I have a 7854 - not a 7904 - but they seem to have the same middle section and controls.
Set up 2 time base units as you need. Then you need to direct the triggering controls to the appropriate vertical plugins using the trigger source push buttons in that middle area; A is the left horizontal plugin, B is the right. Select either left or right vertical plugin as needed. Then use the right bank of illuminated buttons to chop or alternate the sweeps. Generally ALT works better for higher frequency sweeps while CHOP is better for slower stuff. I¡¯m sure there are plenty of exceptions.
-d
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Re: 2465B scopes For Sale
All the scopes have been spoken for. I still have lots of parts available.
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Re: More Complete List of Concept Series and Measurements Concepts Books
The directory above the directory in the cited link
also has a ton of Tektronix documents. I ran across this a few years ago and grabbed a bunch of stuff. I actually thought I heard about on one of the Tektronix forums.
Does anyone know who the owner of this site is?
DaveD
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On 4/13/2019 9:57 AM, Chuck Lippmeier wrote: After my last posting I googled around and found this link to an index of
downloadable .pdfs of the largest collection of Tek books I've ever seen. It
even has the "Semiconductor Diodes and Transistors" series I mentioned, I
wanted (7 Volumes not just the 2 I knew about). The Concepts books are
listed too.
Chuck Lippmeier
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David C. Partridge
Doug Bercich