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Re: What are these Tek parts for?
One of those looks like the front cover for a series-7000 scope (option #8). It even still has the foam bits for holding probe parts. I've no idea what the other thing is, but could it be some kind of implosion screen?
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Colin. -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of David Berlind Sent: 02 July 2018 02:14 To: [email protected] Subject: [TekScopes] What are these Tek parts for? Two parts... some sort of cover.. but I don't think it's for anything I own. Smells like an old Tek scope too! If I have no need for this and someone else does, I'd be happy to stick it in a box if you cover postage. |
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Re: s3100 restoration
Here's some photos of the 568 & 3T6 I got from a local Surplus Store.
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They're pretty crappy photos the Sun is going down but somebody wanted to see them. I wish I still had my mod sheets of all the different S3100 mods and mods to the 568 3T6/3S6 we did for the S3200 family. I guess just more things to figure out. Plug-in wise it's starting to look like getting a clean 3S6 might be an issue. On Sun, Jul 1, 2018, 1:51 PM Pete Lancashire <xyzzypdx@...> wrote:
It's going to be a big project I hope to be able to complete at least parts |
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Re: Tek on Youtube
On 2018-07-01 5:38 PM, HankC, Boston, WA1HOS via Groups.Io wrote:
This really is a gem and quite revealing of the attitudes and thoroughness that promoted Tektronix quality. Thanks for the link. --Toby
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Looking for Rare Trace Rot/Trace Sep Pot for 556
Part number is 311-0595-00
It's 3 potentiometers... two 500 kohm pots, and one 10 kohm pot. If I'm unable to find this potentiometer, anyone have any ideas what sort of modern thing I could replace it with? I have access to a machine shop if that helps. |
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Re: K213 Instrument Cart Drawer Jammed
Chuck Harris
I kind of doubt that it is painted metal on painted
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metal. Every scope cart drawer that I have seen has a few holes at their ends that hold little plastic buttons that the drawer glides on. They don't become painted metal on painted metal until the nylon/delrin buttons disintegrate. -Chuck Harris Jim Hill wrote: After much fiddling around, I managed to close the drawer, put the scope on it's side |
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7912AD Fails start-up self-test (perhaps)
So as of a few hours ago I became the proud owner of a 7912AD with a matched pair of 624 & 634 monitors.
The inevitable puff of smoke led me to a hot 10R resistor and thus the equally inevitable shorted blue tant (why is it nearly always the blue ones that die but only rarely the yellow ones?) on the +15V rail on A38 Scan board. Once that was fixed things seemed ok power-wise, or at least all voltages looked ok on the PSU test points, the fan runs up but we don't get much further. I believe I should see the 'Remote' and 'Digital' lights come on for two seconds followed by the 'TV' and 'Local' lights coming on but all I see is two brief flashes of the 'Reduce Intensity' LED, a short pause, a third flash then nothing. My question is: Does the self-test actually flash that LED (it is not mentioned in the manual as far as I can see) or does the fact that it comes on at all mean that the system is sensing a high intensity somehow and aborting the start-up? - and yes, the two intensity pots are set at minimum. Right now I'm thinking it could be the A10 front panel and A22 'Translator' boards need looking at ..... but I'm still wading through 400+pages of manual...... Adrian |
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Re: K213 Instrument Cart Drawer Jammed
Try using a bar of soap for lubricant. It won't affect the paint, and it has worked well for hundreds of years.
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Michael A. Terrell -----Original Message-----
From: Jim Hill <slimjimwas@...> |
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Re: K213 Instrument Cart Drawer Jammed
After much fiddling around, I managed to close the drawer, put the scope on it's side and remove the bottom plate. There is nothing sophisticated like tabs to move when removing the drawer. It is just painted metal sliding on painted metal. I'm unable to remove the drawer, but fortunately don't need to do so. The drawer just binds when attempting to open or close, and if you give it a good try, it jams. I will try using paste floor wax on the sliding surfaces and see if that helps.
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Jim At 05:24 PM 6/29/2018, Michael A. Terrell wrote:
Are there locks on the drawer slides that drop into place when you pull it all thew way out? If so you push in on them, while closing the drawer. |
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Re: s3100 restoration
It's going to be a big project I hope to be able to complete at least parts
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of it so that whoever may take it on after me will not have a hard time finishing it ? Very few people know the history of ATE Tektronix was decades ahead of everybody else. And also made a bundle of money in the process. Unfortunately almost everybody involved got no recognition. On Sun, Jul 1, 2018, 11:09 AM Miguel Work <harrimansat@...> wrote:
Amazing, please photos!!! |
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Re: s3100 restoration
Amazing, please photos!!!
-----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Pete Lancashire Enviado el: domingo, 1 de julio de 2018 18:00 Para: [email protected] Asunto: [TekScopes] s3100 restoration I acquired a very clean 568 & 3T6 yesterday. Pictures by end of day. Registered S3100.org Put offers on 2 x sampling head extenders and were accepted. Need / looking for - Plugin paddle boards, or one I can use to get boars made - Board extenders for the inside boards in the 3T6 - P/N for the interconnect cables and cables - A-3A heads and accessories. - R241 & cards, etc. - S3110 rack. there must be on in the Beaverton/Portland area, Even the name plate would be nice. - Test drawer, dut holder etc - Integration manual (interconnect) not needed but would be nice to have, does give p/n's for all cables. Next week will be picking up at least one mouse poop covered R230 and at least two R568s for parts. |
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s3100 restoration
I acquired a very clean 568 & 3T6 yesterday. Pictures by end of day.
Registered S3100.org Put offers on 2 x sampling head extenders and were accepted. Need / looking for - Plugin paddle boards, or one I can use to get boars made - Board extenders for the inside boards in the 3T6 - P/N for the interconnect cables and cables - A-3A heads and accessories. - R241 & cards, etc. - S3110 rack. there must be on in the Beaverton/Portland area, Even the name plate would be nice. - Test drawer, dut holder etc - Integration manual (interconnect) not needed but would be nice to have, does give p/n's for all cables. Next week will be picking up at least one mouse poop covered R230 and at least two R568s for parts. |
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Re: Transistor Full Documentary
stefan_trethan
Interesting coincidence, I watched it just this morning!
While I was generally familiar with the history, it had somehow never struck me before how the transistor schematic symbol and the terms emitter, collector, base directly derive from the point contact transistor. ST On Sun, Jul 1, 2018 at 4:01 PM, lop pol via Groups.Io <the_infinite_penguin@...> wrote:
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Re: Tek 465 no display
On Sat, 30 Jun 2018 19:29:50 -0700, you wrote:
Hi Harvey, I might have to go a bit more budget on the rework station to begin with. So far I have been lucky. When I need something and keep a positive belief that the need will be met, something always turns up that I can afford. I have almost all Xytronic soldering stations in the lab. Some old Weller and Pace stuff too. When I bought some additional Xytronic gear over 10 yrs ago Xytronic had just come out with new models and Howard's Supply in the US had a close out on the older, more bulletproof units.even the tips were cheap, so I bought 6. Not one has failed. I have two of their newer soft button controlled units but I like the older dial type better. I have a 60 min timer on each bench that all soldering irons and some other tools are plugged into. That was originally for my repair work. I would get called away from what I was doing and sometimes left my iron on. No Bueno!Since there are two basic types of rework stations, I have had to get both. I've had the best luck with a Hakko gun, but I've gotten Ungar and Hakko "wand style" for through holes. For SMT stuff I've got either a hot air gun, (use carefully), a Xytronic heated tweezers, and what works perhaps best, is a metcal system with specialized tips. The Metcal system has an automatic timer. Nothing else does. Oscilloscopes generally are more sophisticated than not. The main advantage of those dual time bases is to be able to examine a very specific part of a waveform, after a delay, for instance. While this is not as important in audio work, it is important in digital or TV work. The dual channels are very useful for comparing inputs to outputs, with the subtract and invert function helping to isolate distortion. For the rest of it, the more complicated scopes generally allow (thinking 7000 series here) more measurements to be made under extreme conditions. Plugins can measure voltage or frequency directly as needed. But for the most part, oscilloscopes remain oscilloscopes. Maybe in the years that I have left I will learn more about the real potential of the tools I have.....and more about transistors before they join tubes as a relic junkies hobby.Tubes still have good uses. Even if everything goes to modules, for now, transistors are inside those modules. I often wonder how long repair shops will even be cost effective over replacement . It seems like nowadays, by the time a battery in a device no longer takes a charge it is already a dinosaur.?While this may be accurate for consumer "bleeding edge" technology, say the latest cell phone, I am using (as are you) oscilloscopes using transistors (or perhaps tubes) that are almost 40 years old. There's reasons we still do. Cost, capability, repairability, at least. That's one good reason why I have two 7904 parts donor units to keep my 7904 happy. Someone had gotten to them before, removing things, so while I might be able to get one working out of those, I'll just stick to having them be parts units. Different technology, different design goals. Tektronix equipment (and HP) were intended to keep on running, and were frequently overbuilt (as they understood it, see the discussion on capacitors elsewhere). Harvey
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Re: CRT to fit 2215
On Sat, Jun 30, 2018 at 10:46 am, lop pol wrote:
Found a 154-0861-00 on the evil auction site. $38 with free shipping. Its in Colorado so it shouldn't have to bounce around from the east coast to me in Arizona. I'll have to chop the PDA to fit the little spade connector on the 2215. Not having to butcher anything makes me very happy. I hope they pack it right. |
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Re: TDS5xx pimpery
For me DPO is for a limited purpose, but having the privilege of playing
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around with the keysight scope or you could turn it on or off I could see many other uses. My application is Teletype, where data is converted from parallel to serial mechanically. One has to adjust mechanical parts to place the equivalent of the clock to the center of the varying change from 1 to 0. Having a DPO made it a dream. On Sat, Jun 30, 2018, 8:27 PM Tam Hanna <tamhan@...> wrote:
Sir Trethan, |
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Re: TDS5xx pimpery
Sir Trethan,
TL'DR: Tam uses DPO to make measurement on process computers. Customers love look of DPO diagram. I fully understand the issues you raise re DPO, especially in that Information is discarded during the fart-out process. This, however, is not always a problem. As a process computer jockey, the situation often calls for getting a "bigger picture of system response" over some kind of characteristic pulse. In that case, DPO provides a VERY convinient way to get an overview of things, especially in the color graded variant. Of course, the noise problems are imminent and annoying, especially if your lab is full of LED lighting which is known to be a toilet of EMI. I could provide some pics showing this, but don't know how to post them from my BB. Secondarily, especially non-technical customers love the look of DPO diagrams. This can be a real sales getter. P.s Mandatory DPO would kill a scope for me. DPO is a feature you use SOMETIMES - my main runner is my LeCroy, which doesn't have the feature. --- With best regards Tam HANNA (emailing on a BlackBerry PRIV) Enjoy electronics? Join 11k other followers by visiting the Crazy Electronics Lab at |
Michael A. Terrell
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