Re: TM500 / 5000 Extenders - should I make more?
link does no work in US either.
I am interested too!
搁别苍é别
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On 2018-05-14 11:54 PM, Adrian wrote: I could use a couple, let me know if a deposit will help the cashflow!
BTW, the Amazon link below doesn't seem to work - from the UK at least?
Adrian
On 5/14/2018 5:33 PM, dnmeeks wrote:
Hello Tek Heads -
I made a bunch of extenders, thank you to those that purchased through my Amazon page or through this group. I hope everyone that bought one is happy with them.
I am out of PC boards, and I'm trying to decide whether to make another batch. I sort of feel like the market for these is like 100 people and everyone that wants one (or two) has already bought them.
If you think you might want one, or if you have an opinion about the total available market for these please let me know.
I guess at the same time, if anyone that bought a set has any ideas for improvements please let me know that, too. If I do happen to make more I'll improve them if I can.
One thing I did was make the SMT parts larger (the resistors are 1206 and the diodes are SMA size, and the LEDs are T-1 through-hole parts). This is for the people that just wanted to buy a kit of parts, so you can more easily solder the parts yourself, rather than me doing it.
I was thinking about this because I had two module that I fixed this weekend. Reminded how handy these things are!
Thanks -
Dan
Here's a link showing the extenders:
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Re: CSA803 power-on error E2131
Thanks a lot Bob! I must have overlooked that one between all those bitmap patterns.
A lot of reading. This will keep me busy a while.
Albert
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On Tue, May 15, 2018 at 07:45 am, Bob Koller wrote:
Go to KO4BB.com, and in the Tektronix manuals section, find the 11801 factory
diag. manual. That may provide some assistance.
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Re: Tek 2465A/B back cover
Super glue is just about always the wrong thing to
use in a repair. It shines when the materials to be
affixed are not dissolvable in a solvent glue.
The best way to fix all of the usual tektronix plastic
panel parts... knobs, bezels, backs... is a hobby thin
solvent glue. The back panels respond very well to
this type of gluing.
Most of the cracking comes from excess tightening of the
feet and middle of the panel mounting screws. They only
need to be barely more than finger tight.
-Chuck Harris
miketakeguess via Groups.Io wrote:
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Hello everyone,
I am looking for a back cover for a Tektronix 2465B oscillocope, mine has a badly cracked corner and can't be fixed with super glue very well. From what I can tell, the back cover to a 2465A and 2445A/B are equivalent, but the non suffix units (2445/2465) will not work. I am looking for just a "standard" back cover, not the taller ones used on the 2465BDM DMM units. I also don't need any cutouts for any options.
I haven't had any luck finding on ebay, so I thought maybe someone here might have one or know where to find one.
Thanks!
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Re: Tek 2465A/B back cover
Email me
d.garrido@... <mailto:d.garrido@...>. I have what you need.
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On May 15, 2018, at 10:39 AM, miketakeguess via Groups.Io <miketakeguess@...> wrote:
Hello everyone,
I am looking for a back cover for a Tektronix 2465B oscillocope, mine has a badly cracked corner and can't be fixed with super glue very well. From what I can tell, the back cover to a 2465A and 2445A/B are equivalent, but the non suffix units (2445/2465) will not work. I am looking for just a "standard" back cover, not the taller ones used on the 2465BDM DMM units. I also don't need any cutouts for any options.
I haven't had any luck finding on ebay, so I thought maybe someone here might have one or know where to find one.
Thanks!
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Re: CSA803 power-on error E2131
Go to KO4BB.com, and in the Tektronix manuals section, find the 11801 factory diag. manual. That may provide some assistance.
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Hello everyone,
I am looking for a back cover for a Tektronix 2465B oscillocope, mine has a badly cracked corner and can't be fixed with super glue very well. From what I can tell, the back cover to a 2465A and 2445A/B are equivalent, but the non suffix units (2445/2465) will not work. I am looking for just a "standard" back cover, not the taller ones used on the 2465BDM DMM units. I also don't need any cutouts for any options.
I haven't had any luck finding on ebay, so I thought maybe someone here might have one or know where to find one.
Thanks!
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Re: scanned: General Radio 1124 manual
And here are some photos of the unit:
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Re: 7T11 sampling timebase - how does it behave?
Well, I just checked my S12, which might not be the same one as I used 7 years ago. I never calibrated a 7S12 since I have only one flex extender (and 2 kits still waiting for the soldering iron).
I used the TDR capability of the 7S12/S-52/S-6 and measured time shifts as response to a GR-873 airline stub length changes. The stub has a dial in cm, that makes things easy. At 20 ps/div a 3 cm change gave a shift slightly over 10 div. Conversely, a 9 div shift was obtained by 2.6 cm length change.
In a similar way I checked 100 ps/div, both with a 10 cm length change, and also with a an ordinary 10 cm GR airline which I installed/removed following a 20 cm airline (so the end geometry shifts nicely 10 cm).
All together I estimate that the sweeps go about 15% too fast!
I repeated a rise time measurement of this configuration for which I found 33 ps in the past. It depends of course somewhat (or a lot) on what you choose as 0% and 100% levels. I got 31 - 33 ps, where 33 ps is really with exaggerated levels (100% at top of oscillation, 0% far to the left). Plus 15% gives about 36 - 38 %.
The 7T11A I tried was far to noisy to repeat this, probably because of the hot (and nice!) weather. I have calibrated 7T11(A)s about 7 years ago and don't remember how well this worked.
Dennis made a good point by raising the calibration question!
Albert
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On Tue, May 15, 2018 at 03:36 am, Raymond Domp Frank wrote:
I just checked my 7T11A by applying a 2 GHz signal from my HP 8648B. I have no
synthesizers that go higher in frequency. The synthesizer is adjusted to a few
tens of ppb max.
Checking the signal's 500 ps period on the 7T11A's 20 ps/div setting (using
the same 7854 as with the other exdperiments) I could see the half period (250
ps) taking just about exactly 12.5 divisions (less than half a division off).
I conclude that the 7T11A's time base accuracy is fine at 20 ps/div.
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Re: TM500 / 5000 Extenders - should I make more?
Hi
I am interested in a couple of ready made ones.
Thanks.
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Re: Help using this Group
At 09:36 PM 5/13/2018, Ian wrote: 1. There are several Topics on this Site that I wish to follow closely. Is there a way for me to identify these Topics so that I don't miss any posts, even when I go away for a few weeks? I create a filter in my email client that looks for that subject line and saves those messages in their own folder. Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
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Re: TM500 / 5000 Extenders - should I make more?
Thanks Dan, that works. If I hover over the original link I see the URL has gained a " %uFEFF " at the end, probably got corrupted in the email somehow?
Anyway that's great and if you do decide to go ahead with some more I'm very happy to pay in advance to help with confidence/cashflow!
Adrian
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On 5/15/2018 11:58 AM, dnmeeks wrote: Not sure why the link doesn't work. If you search it doesn't come up, but I suspect that's because they are out of stock. Here is the link again, just in case:
If that doesn't work email me off list and I'll send some pics to you.
Thanks
dan
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Re: TM500 / 5000 Extenders - should I make more?
Not sure why the link doesn't work. If you search it doesn't come up, but I suspect that's because they are out of stock. Here is the link again, just in case:
If that doesn't work email me off list and I'll send some pics to you.
Thanks
dan
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Re: 7T11 sampling timebase - how does it behave?
Raymond said: I could see the half period (250 ps) taking just about exactly 12.5 divisions (less than half a division off).
I did not try to minimize noise in the trace and determine the time more exactly. If anything, I'd say the 250 ps showed as being a bit *longer* than 250 ps. Raymond
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Re: 7T11 sampling timebase - how does it behave?
Hi Dennis,
I have never calibrated the 7T11 timebase
Neither have I.
I am not so sure you can assume your 7T11 is calibrated because you scope with a real time timebase
using a 067-0581-01
I didn't mean to say that. I tried to explain that I calibrate and if necessary, adjustall my "new" mainframes using twin 067-0581-01's, one horizontal, one vertical. I swap them to find out if one is off. Of course, calibration status of the 7T11 cannot be checked by using a real time time base for calibration, not that I would know of anyway. I just checked my 7T11A by applying a 2 GHz signal from my HP 8648B. I have no synthesizers that go higher in frequency. The synthesizer is adjusted to a few tens of ppb max. Checking the signal's 500 ps period on the 7T11A's 20 ps/div setting (using the same 7854 as with the other exdperiments) I could see the half period (250 ps) taking just about exactly 12.5 divisions (less than half a division off). I conclude that the 7T11A's time base accuracy is fine at 20 ps/div.
I hope we hear from someone who has tried calibrating a 7T11 both ways and can shed some light on the matter.
I think I just did that at 20 ps/div. Raymond
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Re: CSA803 power-on error E2131
T1331 is a battery problem on u500 according to a tektronics thread I read, are you sure your replacments battery was good? Did you use a grounded tip on the positive leg of the chip, I read this can kill a battery, I don’t know if true or not as I used hot air to remove mine and the zif socket was replaced with a grounded tip iron there was no chip in the socket. With that error I would be looking at u500 and around it for a problem. Sent from Mail for Windows 10 From: Albert Otten Sent: Tuesday, May 15, 2018 3:24 AM To: [email protected]Subject: Re: [TekScopes] CSA803 power-on error E2131 No, I only replaced the "Dallas" NVRAM modules U500 and U511 at the A5 board. T1331 is consistent. I can't exit the Extended Diagnostics, so I think the contents of these NVRAMs won't be updated and usable at the next power-up. Hence my main concern is E2131 and other E faults (it says 3 faults in total, only the code of the first fault is displayed). Albert On Mon, May 14, 2018 at 03:11 pm, Dewey Wyatt wrote:
Albert, did you replace any of these chips they all contain firmware. u140 and
u150 on a 15 mmu board
a 18 memory board u800,u900,u812,u910,u820,u920,u830,u930
a5 timebase controller u300,u310,u400,u410
Sent from Mail for Windows 10
From: Albert Otten
Sent: Monday, May 14, 2018 5:05 PM
To: [email protected]
Subject: Re: [TekScopes] CSA803 power-on error E2131
On Mon, May 14, 2018 at 01:09 pm, Kurt Rosenfeld wrote:
Albert,
Good to know that GPIB doesn't work when it has hung. What's our best
hypothesis for why it hangs?
-Kurt
As you said it's probably "something" with the Front panel interrupt handling.
E2131 points to that in the 11400 series you said, and also the CRT text hints
in this direction: Executive - Front panel - Control - Interrupt. The signal &
control path is via the A14 I/O board; this board issues (or passes?) an
interrupt to the A17 Exe board Interrupt Controller.
Strange enough the start-up messages seem to be variable. At present I get
E2131, 3 faults, with above mentioned text. Earlier it were 5 faults with
text Executive - Front panel - Keys - Open. Then I noticed that the Measure
button was stuck. I remedied that and got 2 faults. After several measurements
at were those 3 faults. When I deliberately push the Measure button during
start-up then I get 5 faults but with the Control text and not that Keys text.
Also yesterday the Display intensity changed when I rotated one of the knobs,
but earlier and today there was no response at all to those knobs.
The problem could be as simple as bad contacts in a ribbon cable connector. I
checked the 40-wire cable between A10 Front Panel Control and A14 I/O, all
wires showed continuity. I also jiggled the other connectors at the A10 board.
W.r.t. GPIB, all settings are internal in the CSA and moreover might be
destroyed by the NVRAM chips replacement. I tried to make contact at primary
addresses 0 to 6 or so, the same way I do it with the 7854 and the 2232. At
IDN? and serial poll I only get errors in return.
Albert
---
This email has been checked for viruses by AVG.
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Re: Help using this Group
I read the messages as Webmail. Then I use Seamonkey to download the messages I want to archive, plus I sort threads by model numbers into separate folders.
Michael A. Terrell
--
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-----Original Message----- From: tinkera123 <iacbell@...>
Sent: May 14, 2018 11:06 PM
To: [email protected]
Subject: Re: [TekScopes] Help using this Group
Looks like I will have to convert to an Email system ..... thanks for the input.
Cheers,
Ian
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Re: TM500 / 5000 Extenders - should I make more?
I will be interested in a second one built-up if available, for my double-width plugins.
And a 7000 series version :-|
EJP
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Re: Help using this Group
If you do, can I make a couple of observations about which one to choose...
If possible choose one which stores the messages locally in the very old mbox format. Many applications use that format, so if one application ceases to be acceptable it is trivial to switch to another. That's reassuring, since it means that all my emails back to 2005 will remain available.
An extreme example of stupidity of not using mbox... A couple of decades ago I played around with Eudora, and found it stored attachments in a separate directory. That meant, to my amazement, that a second attachment foo.txt in a second email overwrote the first attachment foo.txt from an earlier email. Stunning.
Choose one which allows flexible rearrangement of email ordering (date/subject) and especially threaded displays.
Access mechanisms: POP3 allows you to download messages to your computer. IMAP allows you to do that and/or leave them on the server. I use the latter so that my emails are stored both on my computer (good if the email provider screws up and loses them all) as well as on the server (for easier searching or in case I screw up).
Seamonkey (a predecessor of Thunderbird which is still supported) works best for me, partly because it continues to have good performance with 13427 emails in my inbox :) YMMV, of course.
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On 15/05/18 04:06, tinkera123 wrote: Looks like I will have to convert to an Email system ..... thanks for the input.
Cheers,
Ian
I find this to be easy...
I receive each post as an individual email, not a daily digest.
I use an email client (Thunderbird or Seamonkey) that displays messages in
their
threads, as a tree based on their subject. Thus assuming all these messages
have
the same subject and each digit implies which post is a reply to which other
post
1
-1.1
-1.2
--1.2.1
Hi all,
1. There are several Topics on this Site that I wish to follow closely. Is there a way for me to identify these Topics so that I don't miss any posts,
even when I go away for a few weeks?? I know that I could write down the
Topic name and do a Search ... but surely there is a better way??
Specifically, Topic "7633 readout drift" by Lop pol .... as my 7603 Scope
has the same symptoms.
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Re: CSA803 power-on error E2131
No, I only replaced the "Dallas" NVRAM modules U500 and U511 at the A5 board. T1331 is consistent. I can't exit the Extended Diagnostics, so I think the contents of these NVRAMs won't be updated and usable at the next power-up.
Hence my main concern is E2131 and other E faults (it says 3 faults in total, only the code of the first fault is displayed).
Albert
toggle quoted message
Show quoted text
On Mon, May 14, 2018 at 03:11 pm, Dewey Wyatt wrote:
Albert, did you replace any of these chips they all contain firmware. u140 and
u150 on a 15 mmu board
a 18 memory board u800,u900,u812,u910,u820,u920,u830,u930
a5 timebase controller u300,u310,u400,u410
Sent from Mail for Windows 10
From: Albert Otten
Sent: Monday, May 14, 2018 5:05 PM
To: [email protected]
Subject: Re: [TekScopes] CSA803 power-on error E2131
On Mon, May 14, 2018 at 01:09 pm, Kurt Rosenfeld wrote:
Albert,
Good to know that GPIB doesn't work when it has hung. What's our best
hypothesis for why it hangs?
-Kurt
As you said it's probably "something" with the Front panel interrupt handling.
E2131 points to that in the 11400 series you said, and also the CRT text hints
in this direction: Executive - Front panel - Control - Interrupt. The signal &
control path is via the A14 I/O board; this board issues (or passes?) an
interrupt to the A17 Exe board Interrupt Controller.
Strange enough the start-up messages seem to be variable. At present I get
E2131, 3 faults, with above mentioned text. Earlier it were 5 faults with
text Executive - Front panel - Keys - Open. Then I noticed that the Measure
button was stuck. I remedied that and got 2 faults. After several measurements
at were those 3 faults. When I deliberately push the Measure button during
start-up then I get 5 faults but with the Control text and not that Keys text.
Also yesterday the Display intensity changed when I rotated one of the knobs,
but earlier and today there was no response at all to those knobs.
The problem could be as simple as bad contacts in a ribbon cable connector. I
checked the 40-wire cable between A10 Front Panel Control and A14 I/O, all
wires showed continuity. I also jiggled the other connectors at the A10 board.
W.r.t. GPIB, all settings are internal in the CSA and moreover might be
destroyed by the NVRAM chips replacement. I tried to make contact at primary
addresses 0 to 6 or so, the same way I do it with the 7854 and the 2232. At
IDN? and serial poll I only get errors in return.
Albert
---
This email has been checked for viruses by AVG.
|
Re: Tek 577 sells for $256 on eBay
Hi Craig,
Well that is always the issue.
Do you want to build and repair test equipment or use test equipment? It s a fine line that deserves
some thought before action.
Rebuilding an HV switching xfmr is definitely for the former!!! But I have to admit I have fallen
into the
fixit trap more often than I want to admit. I d have been better off buying something new!
Kjo Well, I don't agree. You cannot buy a new anything that comes remotely close to a 576 curve tracer, at least anything that costs less than $12,000 (for a refurbished, obsolete, Tek 370A). I shudder to think what the current Keithley 2600-PCT-4B costs, but think seriously big money. And if your pockets are that deep - go for it! But back in the real world, before you get to use the 576 - you have to fix it. And a free 576 is most certainly worth a day fixing. Craig
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Dale H. Cook
Raymond Domp Frank
Michael A. Terrell