Does anyone know what the wiring harness lacing material is inside, say, a 1A4?
=================================================================================== When I was there during 1966-1971 the lacing was clear and round. It should be listed in one of the Common Design Books. Rolynn
|
Re: 465M goes dead and then magically comes back to life.
Yes Dave, I have had fuse holders go iffy on me before. Sometimes replacing a fuse holder turns into a big project. This fuse holder on the 465M interface board feels very tight when I snap in a new fuse. I will just have to wait and see how things go with this.
Michael
|
Don't know. It focuses at about 8 inches in front of me. Wearing them takes getting used to, but it lets you work at a "normal" distance. I guess it's a YMMV situation, but I am quite pleased with my pair.
Chinese unbranded optics seem quite good, I bought a bunch of telephoto and macro and fisheye lenses for my phone and they are quite good.
|
On 10/3/18 5:56 PM, snapdiode via Groups.Io wrote: I've been using the standard OptiVisor for years, never really feeling it's all that great.
Then I got these What is the term marking distance? 420mm. Is that the distance from the front of the lenses they focus at?
|
On 10/3/18 5:48 PM, snapdiode via Groups.Io wrote: Does anyone know what the wiring harness lacing material is inside, say, a 1A4? I don't know, but I have a feeling it is waxed nylon webbing about 3mm wide and less than a .5mm thick. It was a kind of a standard of the 60's 70's even the 80's (in mil contract land).
|
I've been using the standard OptiVisor for years, never really feeling it's all that great.
Then I got these
Never going back. OptiVisors are like a 19th century also-ran compared to these dentist loupes.
|
Does anyone know what the wiring harness lacing material is inside, say, a 1A4?
|
On Wed, 3 Oct 2018 14:36:39 -0700, you wrote: re: the CPU
I meant to followup on that but just forgot.? I'll have to open it up
again or see if I can tell from the photo a model number. There is a
large an Altera chip and Altera was bought out by Intel in 2015.? Don't
know if their chips still carry the Altera name. You'll be able to figure out (perhaps) what the chip is, and get data on it. You may or may not be able to read the formatting from the chip, most FPGAs do have encoding capability and "non read back" capability. Now, assuming that you can get the code and figure out what it was, then that gives you the hardware in the system. You get the schematic (if you're lucky) and then you have to figure out what it does.
Ok, from looking at the photo I think the Altera chip is a Cyclone IV
which apparently is a FPGA.? Ill look at some other chips too.
Cyclone IV is, also it's possible that it has a "soft processor" which is a downloaded processor core that does processing.
I appreciate everybody's ideas and encouragement on following up on this
thing.? No plans to sell it or anything it's too nice to have a Tek
prototype you can carry in your shirt pocket even if it is basically a
paper weight.
But a very NICE paperweight. No processor? In that case, look for the innards to have a USB interface, and then you have to figure out what that did with that. Looking at a typical scope, you need triggering circuits, timebases, memory store arrays (dual port) and then readback arrays, all under the control of the USB commands. Harvey
Adrian:? I do feel like I am on a mission similar to your spectrometer.
Bob.
On 10/3/2018 9:51 AM, Bert Haskins wrote:
On 10/3/2018 9:22 AM, bobh@... wrote:
I sent emails to Tek asking them what it is.? Finally, got a reply
that it was a prototype that was never put into production.
/g/TekScopes/album?id=71356&p=Name,,,20,1,0,0
Bob.
On 9/13/2018 8:30 AM, Robert Hay wrote:
I picked up what is apparently a Tek scope.? But, I can't find a
model number or any information about it.? I looks like the
Tektronix version of the Pico scope which uses a USB connection to a
computer.?? Here is a link to the photos:
/g/TekScopes/album?id=71356&p=Name,,,20,1,0,0
Anybody have one or know when it was made, etc?
Bob. What is the CPU?
If you ever want to get rid of it, please let me know.
Thanks,
?Bert
|
re: the CPU
I meant to followup on that but just forgot.? I'll have to open it up again or see if I can tell from the photo a model number. There is a large an Altera chip and Altera was bought out by Intel in 2015.? Don't know if their chips still carry the Altera name.
Ok, from looking at the photo I think the Altera chip is a Cyclone IV which apparently is a FPGA.? Ill look at some other chips too.
I appreciate everybody's ideas and encouragement on following up on this thing.? No plans to sell it or anything it's too nice to have a Tek prototype you can carry in your shirt pocket even if it is basically a paper weight.
Adrian:? I do feel like I am on a mission similar to your spectrometer.
Bob.
toggle quoted message
Show quoted text
On 10/3/2018 9:51 AM, Bert Haskins wrote:
On 10/3/2018 9:22 AM, bobh@... wrote:
I sent emails to Tek asking them what it is.? Finally, got a reply that it was a prototype that was never put into production.
/g/TekScopes/album?id=71356&p=Name,,,20,1,0,0
Bob.
On 9/13/2018 8:30 AM, Robert Hay wrote:
I picked up what is apparently a Tek scope.? But, I can't find a model number or any information about it.? I looks like the Tektronix version of the Pico scope which uses a USB connection to a computer.?? Here is a link to the photos:
/g/TekScopes/album?id=71356&p=Name,,,20,1,0,0
Anybody have one or know when it was made, etc?
Bob. What is the CPU?
If you ever want to get rid of it, please let me know.
Thanks,
?Bert
|
Re: 7B53A seamless modification... Adding Alternate Delayed time base visualization (with trace separation)
On Wed, Oct 3, 2018 at 09:39 PM, Fabio Trevisan wrote:
P.S. Any chance to obtain a better scan of this microfiche?
That would be if someone else has better sheet. With mine it was impossible to get a clear view even on the reader. Usually they are better than this. /H?kan
|
Re: 465M goes dead and then magically comes back to life.
I had something similar on a piece of audio equipment --- the
intermittent nature had me baffled for ages.
I should add that each time it failed I checked the fuse and put it back.
Then one day it failed and one of my kids just bashed it and it came on
again!
Turned out that one end of the fuse wire wasn't connected properly to
the end cap!
Caused a lot of bad language at the time but funny now.
I've also had fuse holders go "iffy" - in one case it was corrosion.
Regards, Dave
toggle quoted message
Show quoted text
On 03/10/2018 20:45, ironcoder@... wrote: My 465M went dead. It started with the power LED flashing. Then it went dead. I went to a fuse inside in the power supply that was 1/4 amp. It had 56 volts on one side and zero on the other. I pulled this fuse out and ohmed it. It measured good. I ohmed the fused circuit to ground. It measured 2.5K ohms. I reinserted it in the circuit. The scope started working again. I did change the fuse anyway and now I cannot get it to fail. Can a fuse be intermittent? My experience is that a blown fuse is just that, blown forever. I am suspicious there is some other problem lurking in that scope. I have a digital Hantek scope, but I just love using this 465M for troubleshooting anyway. It is an old friend. I don't know if they still sell analogue scopes anywhere. I am guessing not. I love the real time high resolution display.
Michael
.
|
465M goes dead and then magically comes back to life.
My 465M went dead. It started with the power LED flashing. Then it went dead. I went to a fuse inside in the power supply that was 1/4 amp. It had 56 volts on one side and zero on the other. I pulled this fuse out and ohmed it. It measured good. I ohmed the fused circuit to ground. It measured 2.5K ohms. I reinserted it in the circuit. The scope started working again. I did change the fuse anyway and now I cannot get it to fail. Can a fuse be intermittent? My experience is that a blown fuse is just that, blown forever. I am suspicious there is some other problem lurking in that scope. I have a digital Hantek scope, but I just love using this 465M for troubleshooting anyway. It is an old friend. I don't know if they still sell analogue scopes anywhere. I am guessing not. I love the real time high resolution display.
Michael
|
Re: 7B53A seamless modification... Adding Alternate Delayed time base visualization (with trace separation)
Hakan,
Ah Hah! I knew it was too obvious for not having been thought of before!
On the other side...I`m kind of sad now. I was hoping that I had an original idea :-(.
At least, to save my face, for what I understood, they crippled the X1-X10 button to enable the Alternate mode...So I think my idea is better in that respect.
It's possible that I can implement my idea with basically the same circuit, just adapting it to use the "Var" control (and its detent switch) and thus, avoiding to cripple the X1-X10 functionality.
Thanks for the heads up.
Rgrds,
Fabio
P.S. Any chance to obtain a better scan of this microfiche?
toggle quoted message
Show quoted text
On Wed, Oct 3, 2018 at 04:06 PM, zenith5106 wrote:
On Wed, Oct 3, 2018 at 09:04 PM, zenith5106 wrote:
I placed a copy of the description here www.hakanh.com/dl/temp/7B53Amod178H
Sorry, the link should be www.hakanh.com/dl/temp/7B53Amod178H.pdf That would be the same as or similar to 7B53A mod 178H.
I placed a copy of the description here www.hakanh.com/dl/temp/7B53Amod178H
but I have to warn you, it is extremely poor quality due to a poor original print and
microfiche original but with a little good will and fantasy most of it could be read.
/H?kan
|
Re: 7B53A seamless modification... Adding Alternate Delayed time base visualization (with trace separation)
On Wed, Oct 3, 2018 at 09:04 PM, zenith5106 wrote:
I placed a copy of the description here www.hakanh.com/dl/temp/7B53Amod178H
Sorry, the link should be www.hakanh.com/dl/temp/7B53Amod178H.pdf /H
|
Re: 7B53A seamless modification... Adding Alternate Delayed time base visualization (with trace separation)
On Wed, Oct 3, 2018 at 03:54 PM, Fabio Trevisan wrote:
What do you think of this idea? Isn't it something that Tek could have added
to the 7B53A (as an option)?
That would be the same as or similar to 7B53A mod 178H. I placed a copy of the description here www.hakanh.com/dl/temp/7B53Amod178H but I have to warn you, it is extremely poor quality due to a poor original print and microfiche original but with a little good will and fantasy most of it could be read. /H?kan
|
Re: Tektronix 2467B good buy?
Here is a scope that might be of interest to you. Ebay item. #202408676485
Below s/n 50000. Thru hole A5 card.
Craig
toggle quoted message
Show quoted text
On Oct 3, 2018, at 10:45 AM, tekscopegroup@... wrote:
On Tue, Oct 2, 2018 at 09:52 AM, Sergey Kubushyn wrote:
On Mon, 1 Oct 2018, jmtfungus via Groups.Io wrote:
TEST 4 FAIL 10 is nothing to worry about -- it is dead battery in Dallas
NVRAM chip. You'll have to replace it with a new NVRAM (buy it from DigiKey
or Mouser, not from Ebay so you'll get a really fresh one, not something at
the end of its life) or, better yet, with FRAM and recalibrate. But would this not mean a total RECAL of the entire scope will be required, which is far from being an easy procedure, or not exactly cheap if sent to a third party accredited cal lab. Most people will not even have the proper equipment in-house to make most calibration adjustments, and even so its a complicated lengthy procedure. You made it sound almost like a routine issue, so I felt this needed to get the proper attention and definitively be weighted into the whole initial cost of acquisition deal. Sure he could get an image of the NVRAM from another similar scope to get this one going again, to maybe be in the ballpark, and then go on from there. But does anyone really want to have one of these top tier scopes sitting on your bench with an accuracy that is just so-so there?
Not to discourage anyone, or implying I am an expert, which I am not but I've read quite a bit about the fears and consequences of lost calibration standards. I have myself been looking around for a 2465x for a while, and although there are procedures to save the NVRAM data from a dying on-chip battery before its lost, and write it to a new chip, it still can be a crap-shoot. But if the data is already lost, all odds are off. So I've tended to stay away from cheap deals listed as "for parts only, tested to power up" and no screen shots of live traces on pictures, or any mention of error codes. I am even considering sticking to the pre 50K serial number B scopes which I understand where still build with through-hole components and have a separate Lithium battery to backup the cal standards.
|
Re: Tektronix 2467B good buy?
There are three types of test 04 errors:
The fail 1X type tells you that the checksum on the whole block
of NVRAM calibration constants is bad, which can really only happen
if the NVRAM has expired, or was never calibrated..
If you had a X1 type of error, then you have a bad parity error, which
means that the checksum on one calibration constant is bad, which
usually means a bad NVRAM, and calibration is bad.
If, you had a X2 type of error, then you could redo the bad section
of the calibration, and go on. But, if you have the equipment to do
that, you might as well do the full calibration.
I have calibrated large numbers of 2465B's and a few 2467B's, they
are equally difficult. The calibration section unique to the 2467B
only adds a couple of minutes to the task, it is balanced out by the
routines unique to the 2465B that you don't do.
Repairing the electrolyte damage on the SMD boards is not usually
all that difficult... unless someone has been there before you and
botched things up. You need to do a good job of removing the crust
from the solder joints before you make any attempt at removing the
parts. It helps greatly to use an under board heater set to 120C.
After you have all of the bad parts off, a good scrubbing in warm
dish soap cleans things up nicely. Dry in a convection oven set to
50C for several hours.
-Chuck Harris
tekscopegroup@... wrote:
toggle quoted message
Show quoted text
On Tue, Oct 2, 2018 at 09:52 AM, Sergey Kubushyn wrote:
On Mon, 1 Oct 2018, jmtfungus via Groups.Io wrote:
TEST 4 FAIL 10 is nothing to worry about -- it is dead battery in Dallas
NVRAM chip. You'll have to replace it with a new NVRAM (buy it from DigiKey
or Mouser, not from Ebay so you'll get a really fresh one, not something at
the end of its life) or, better yet, with FRAM and recalibrate. But would this not mean a total RECAL of the entire scope will be required, which is far from being an easy procedure, or not exactly cheap if sent to a third party accredited cal lab. Most people will not even have the proper equipment in-house to make most calibration adjustments, and even so its a complicated lengthy procedure. You made it sound almost like a routine issue, so I felt this needed to get the proper attention and definitively be weighted into the whole initial cost of acquisition deal. Sure he could get an image of the NVRAM from another similar scope to get this one going again, to maybe be in the ballpark, and then go on from there. But does anyone really want to have one of these top tier scopes sitting on your bench with an accuracy that is just so-so there?
Not to discourage anyone, or implying I am an expert, which I am not but I've read quite a bit about the fears and consequences of lost calibration standards. I have myself been looking around for a 2465x for a while, and although there are procedures to save the NVRAM data from a dying on-chip battery before its lost, and write it to a new chip, it still can be a crap-shoot. But if the data is already lost, all odds are off. So I've tended to stay away from cheap deals listed as "for parts only, tested to power up" and no screen shots of live traces on pictures, or any mention of error codes. I am even considering sticking to the pre 50K serial number B scopes which I understand where still build with through-hole components and have a separate Lithium battery to backup the cal standards.
|
On 10/3/2018 9:22 AM, bobh@... wrote: I sent emails to Tek asking them what it is. Finally, got a reply that it was a prototype that was never put into production.
/g/TekScopes/album?id=71356&p=Name,,,20,1,0,0
Bob.
On 9/13/2018 8:30 AM, Robert Hay wrote:
I picked up what is apparently a Tek scope. But, I can't find a model number or any information about it. I looks like the Tektronix version of the Pico scope which uses a USB connection to a computer. Here is a link to the photos:
/g/TekScopes/album?id=71356&p=Name,,,20,1,0,0
Anybody have one or know when it was made, etc?
Bob. What is the CPU? If you ever want to get rid of it, please let me know. Thanks, Bert
|
So don't give up without some detective work and trust in the power of the internet.
A story:
About a year ago I saw someone (office clearance guy by the look of what else he was selling) offering a badly described and beat-up looking 19" rack mounting IKS Polytec spectrometer starting bid 4.99 GBP.
Thinking it would be full of interesting optical gubbins I put in a bid and got it for 4.99
After a few hours of sorting it out mechanically I fired it up and things looked like they might work but it had no user interface, just a GPIB port which was live and responded to an IDN query but after that I was stuck. Several days of searching with google got me nowhere apart from finding an identical one for sale on the US ebay for over 1K USD.
Polytec said they couldn't help because that part of the company no longer existed but would sell me a current model for 28K Euro minus a 2K trade-in on the one I had - I resisted the temptation!
Google did find plenty of companies offering software for spectrometry and a German one listed compatibility with IKS so I emailed them and asked if this was a model they supported.? The answer was no, they'd never heard of it but "try this person, I think he worked for them once" with an email address - also in Germany. 2 hours later I was in touch with the guy who helped develop the instrument in the late 80s and wrote the firmware, one hour after that it was calibrated and reading spectra.
So you are starting in the right place, is there a clue (internally?) as to which part of Tek might have been involved in the development? Perhaps a new thread with a more precise title might flush out someone? I would have thought someone here could point you in the right direction.
Good luck!
Adrian
toggle quoted message
Show quoted text
On 10/3/2018 3:58 PM, Harvey White wrote: Looks interesting, though. I'd assume they have no software, of
course.
Harvey
|
Re: Tektronix 2467B good buy?
On Tue, Oct 2, 2018 at 09:52 AM, Sergey Kubushyn wrote: On Mon, 1 Oct 2018, jmtfungus via Groups.Io wrote:
TEST 4 FAIL 10 is nothing to worry about -- it is dead battery in Dallas
NVRAM chip. You'll have to replace it with a new NVRAM (buy it from DigiKey
or Mouser, not from Ebay so you'll get a really fresh one, not something at
the end of its life) or, better yet, with FRAM and recalibrate. But would this not mean a total RECAL of the entire scope will be required, which is far from being an easy procedure, or not exactly cheap if sent to a third party accredited cal lab. Most people will not even have the proper equipment in-house to make most calibration adjustments, and even so its a complicated lengthy procedure. You made it sound almost like a routine issue, so I felt this needed to get the proper attention and definitively be weighted into the whole initial cost of acquisition deal. Sure he could get an image of the NVRAM from another similar scope to get this one going again, to maybe be in the ballpark, and then go on from there. But does anyone really want to have one of these top tier scopes sitting on your bench with an accuracy that is just so-so there? Not to discourage anyone, or implying I am an expert, which I am not but I've read quite a bit about the fears and consequences of lost calibration standards. I have myself been looking around for a 2465x for a while, and although there are procedures to save the NVRAM data from a dying on-chip battery before its lost, and write it to a new chip, it still can be a crap-shoot. But if the data is already lost, all odds are off. So I've tended to stay away from cheap deals listed as "for parts only, tested to power up" and no screen shots of live traces on pictures, or any mention of error codes. I am even considering sticking to the pre 50K serial number B scopes which I understand where still build with through-hole components and have a separate Lithium battery to backup the cal standards.
|
ROLYNN PRECHTL K7DFW
zenith5106
Fabio Trevisan
Craig Cramb