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1S1 repair news :-)
Michael Dunn
Yoohoo. I'm making progress repairing my 1S1 1GHz sampling plug-in. The biggest problem was a kaput power supply filter cap - totally dead - well, many, many kohms ESR. Replaced the big old can with a part about 1/6 the volume, yet almost twice the capacitance, and much better quality to boot! Semiconductors aren't the only technology that's improved in the last 35 years!
Also paralleled the smaller final power supply output stability caps with new ones, again much smaller, yet more C's! As for the six missing GaAs diodes in the sampling bridge and elsewhere, I got some SMT Schottky diodes as hopeful subs. The unit is now working somewhat - there are some triggering and offset problems. But, with the right settings and input, I can get a valid trace!!! Whether these probs are a result of the Schottkys, I don't yet know. All I can say is, it's VERY cool to scroll over a 200MHz waveform at 35ps/div! (yes, 35ps. 0.035ns!) Though a bit useless, as the risetime of the thing is *only* about 300ps... |
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Re: 1S1 repair news :-)
Michael
Sometime on Fri, 06 Oct 2000, you wrote:
-is now working somewhat - there are some triggering and offsetCongratulations! :) Michael |
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Re: 453
Michael
Hi again, :)
Sometime on Fri, 06 Oct 2000, you wrote: -Michael wrote: -> I second that. But I don't think I've ever seen one for sale... I wanted -If you really want a 453, you can find them for sale of eBay and in variousI guess you're right. But I've just shelled out $600 for an "as new" 7603 (actually it was cheap!) (and it was "as new" until the post office broke it...) and don't have any more "big" money left right now. But later on, I will be looking out for a 453. :) What I *would* like right now are some calibration standards... Cheers, :) Michael -- Michael VK2XMD 0404-478-205 I used to have a handle on life, but it broke ... |
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T&M Museum / New Release 1.10
stgraef
Hi there,
in between I reworked my online museum. All visitors are welcome again at . You'll find there some service documents about Tek instruments. Maybe someone (Stan ?!) can check for errors or so. I also have a large assortment of spare parts (like the 556 final tubes) - but remember: I'm located in Germany. I will not comment any replys as I'm on buisness trip for the next two weeks. If someone has interesting material which should be published for all of us, please let me know if you have no possibility for an own homepage. ------------------------------------------------------------------------------------------------------------- To Stan: Did you remember all the stuff about the 551/555 interconnection cable? Do you have any backups? It would be a great help for me - otherwise I have to check the whole stuff once more. ------------------------------------------------------------------------------------------------------------- There is a friend of mine (who will also get this message) who obtains an online Tek-only museum too. At the moment he scanned some of his and mine Tek catalogs, and I will convert them to pdf files. If the stuff is available on CD-ROM we'll let you know. Check his collection at That's all for now. Have a good electron glow! Stefan |
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Tek catalogs
Michael Dunn
At 2:52 PM +0200 2000/10/08, stgraef wrote:
At the moment he scanned some ofI can burn CDs (and scan pages). I may also have access to some old catalogs. I'll check... ----------------------------------------------------------------- Michael Dunn | Surround Sound Decoder & Stereo Enhancement Cantares | Self-Amplified Speakers, Test Equipment 74 George St. | Ambisonic Surround Sound CDs and Recording Waterloo, Ont. | (519) 744-9395 (fax: 744-7129) N2J 1K7 | mdunn@... Canada | ----------------------------------------------------------------- |
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Re: Tek catalogs
Stan or Patricia Griffiths
I would be careful not to copy any Tektronix copyrighted material
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without their written permission. When I wrote my book, I got official written permission from Tektronix to use pictures from their old catalogs in my book. Since their old catalogs are copyrighted, official written permission is required. It is true that there are individuals and companies who have been copying Tek copyrighted material for years and getting away with it but it is definitely not legal. On a few special occasions in the past, I believe Tek has given permission to the U.S. Military to copy parts of certain specific manuals, but I don't believe they have given permission to any individual or company to ever copy entire manuals, catalogs, or other technical materials that Tek produces. I have also heard that some individuals have asked permission from Tek to copy some of their Concept Books and they have been specifcally denied permission to do the copies. Tek has shown more interest recently in illegal copies of their stuff. I just wouldn't do it without Tek's permission if I were you . . . and I would not accept permission from the local Sales Office either. Real permission must come from the Tektronix Legal Department in Beaverton, OR. Stan w7ni@... Michael Dunn wrote: At 2:52 PM +0200 2000/10/08, stgraef wrote:At the moment he scanned some ofI can burn CDs (and scan pages). I may also have access to some |
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Re: Tek catalogs
stgraef
Hi Stan,
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of course you're right! I have a writed permission from Tek for non-profit copying. I also contacted all other companies mentioned at me homepage. Most will understand the internet as a "copy-and-paste-all-free" collection. But I thing all material should be published with permission from the authors. And most of them will agree for our purposes. Stefan -----Urspr???ngliche Nachricht----- Von: Stan or Patricia Griffiths <w7ni@...> An: <TekScopes@...> Gesendet: Montag, 9. Oktober 2000 23:00 Betreff: Re: [TekScopes] Tek catalogs I would be careful not to copy any Tektronix copyrighted material |
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Re: Tek catalogs
Stan or Patricia Griffiths
Hi Stephan,
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It looks like you are doing all of the right things to get permission. I have just never heard of Tektronix granting such permission. Has Tek actually responded to you with written permission to publish some of their copyrighted material on the web? I would be surprised if they did . . . If they have given you written permission, I would certainly like to know since I have asked and been denied permission for a few things I would like to publish. Stan w7ni@... stgraef wrote: Hi Stan, |
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Re: Parts needed
Michael,
Do you know the Tek part number? I know a guy who just bought an assortment of Tek pots. Tom Gootee tomg@... --- In TekScopes@..., Michael <mdd@d...> wrote: intensity/readout controls were damaged. It needs a new ganged pot and concentricknobs.
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What's this Tek item?
Hi, all. I just purchased a "Tektronix Multiplexer Control Unit",
for the huge sum of $2.25. (I guess no one else was paying attention, at the time! (Ebay, last night!)) It includes 23 individual S-1 Sampling Heads plugins, which I think I am somewhat familiar with. But, it also includes 32 individual "S-3260/Mod 20 Compensator" plugins. I have NO IDEA what these are, and can't seem to find ANY information with web searches. I am hoping to help finance my Tek scope lust, with this windfall. I know the sampling heads are worth a little something. But I haven't a clue as to the usefulness of the compensators... Does anyone know what these are good for? (First good answer gets a free Compensator plugin, post-paid...!) Thanks!! Tom Gootee tomg@... |
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Re: What's this Tek item?
Stan or Patricia Griffiths
Wow, I need to pay more attention to eBay! You got a REAL STEAL on this
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stuff, and yes, I know what it is. The Tek S-3260 is a very large computer controlled system for testing integrated circuits. It is vintage about 1975 or so. Some of the options for the S3260 included a 568 scope with 3S6 and 3T6 sampling plugins for making some very fast risetime measurements on the IC under test. The S3260 was capable of handling large scale ICs with up to 64 pins in its largest configuration (they may have even made larger ones than that). Any way, the 568/3T6/3S6 is only a two channel sampling system so how do you look at 64 IC pins with only two channels? The answer is that you multiplex the two channels to all 64 pins. How do you do that without losing all the fast capability of the sampling system? The answer is that you locate the sampling heads (S1's in this case) as physically close to the IC pins as you can and dedicate one S1 to each IC pin and multiplex the S1's to the two 3S6 channels. The multiplexing is done in groups of up to four sampling heads plugged into a 286 Sampling Head Multiplexer. If your system needs more than four sampling heads multiplexed, you can multiplex up to four 286's with one 288, for a total of up to 16 sampling heads. Still not enough sampling heads? OK, you can slave up to three 287's to one 288, each one loaded with four 286's, with each of those 286's loaded with up to four sampling heads, for a grand total of 64 sampling heads multiplexed. All of this is explained with pictures on page 251 of your 1973 Tektronix Catalog . . . The multiplexers (286's, 287's, and 288's) are not particularily valuable today (except as maybe an addition to my collection!) since they are only one component of a large S3260 system and you don't have the rest of it, like the DEC PDP-11 computer, the Tek 1340 Interface Units, and the necessary software to control it all. The S1's however, are the gold at the end of this rainbow! The 1989 Tek Catalog lists S1 Sampling Heads available from Tek new at a cost of $1695 each! (And you got 23 of them for $2.25 . . . ! ! not to mention the 286's, etc.) Anyway, those same sampling heads are useful in the 3S2, 7S11, 7S12 and a few other sampling plugins. So, if those sampling heads actually work, you should be able to get at least 1000 times your money back . . . but you would really need to check them out first to expect that kind of return. You say you don't know how to check them out? OK, so I will give you ten times your money right now and I'll check them out . . . how about that! 8-) I took a look at the picture of the stuff you bought and I actually counted 55 sampling heads in the picture. You could always complain to the seller that you thought you were getting everything shown in the picture and you expect to recieve all 55 sampling heads . . . ! ! (Then you should be able to get 2000 times your money ! ! ) Surely this detailed explanation is worth one sampling head and not just a crumby old useless S3260 compensator card, right? Stan w7ni@... tomg@... wrote: Hi, all. I just purchased a "Tektronix Multiplexer Control Unit", |
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Re: Parts needed
Michael
Hiya. :)
Sometime on Tue, 17 Oct 2000, you wrote: -Do you know the Tek part number?I'm expecting a copy of the manual shortly, I'll let you know and you can ask if he has one if you don't mind. Thanks and regards, :) Michael -- Michael VK2XMD 0404-478-205 I used to have a handle on life, but it broke ... |
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Tek 11301/302/A Scopes
Dear Listmembers!
I am interested if anyone knows if the vertical plugins like 7A19,7A24,... work also in the 11302(A) Scopes (The calibration plugin does so) and what disadvantages this would have except that they are not programmable. I am also searching the female 7k scopes plugin connector. (I purchased a 7k rugged plugin extender which is missing the white cover plastic strip and four contacts, but the photograph was taken from the other side so the ..... was not visible to me) Thank You very much Michael B. Haubmann mhaubmann@... |
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Re: Tek 11301/302/A Scopes
Stan or Patricia Griffiths
If you bought that 7K extender on eBay, I think you should file a complaint
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against the seller for misrepresenting the item he was selling. Ebay does not like that very much and will kick him off it it happens a couple more times. I don't like it either and I take great pains to try to describe everything I sell including details of anything minor that is missing or not quite right . . . I also try to photograph the WORST side . . . or both sides. Stan w7ni@... mhaubmann@... wrote: Dear Listmembers! |
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Re: Tek Audio test set aa5001/sg5010
STEVE WILKINS
Dear All,
is there any one out there who fixes the above in the Toronto area ? The unit is used professionally and is in need of some TLC on the analyser regards Steve _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at . Share information about yourself, create your own public profile at . |
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Re: Parts needed
Michael
Hiya. :)
Sometime on Tue, 17 Oct 2000, you wrote: -Do you know the Tek part number?Yep. Part number is: 311-1404-00 Hope you can help... Thanks and regards, :) Michael -- Michael VK2XMD 0404-478-205 I used to have a handle on life, but it broke ... |
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Free Tek 422 for parts/fixer upper
Chris Beck
I have a clean Tek 422 but it does not work. I was told it was the power
supply and that there may be a flyback problem. I haven't verified either problem, and just don't have the time or the desire to track it down. I looked around in the power supply and didn't see any obvious signs of distress, so who knows. The fellow who gave it to me is a chief engineer at a TV station, so I would assume he knew what he was looking at. I've got my big 535A anchor and a small Hitachi 40mHz scope for when I need portablilty, so I'd rather see it go to a good home (USA, preferably) as a parts donor or fixer-upper project. The scope is REALLY clean, but the foam lining of the accessory area in the front cover turned to goo long ago. It would need a bit of elbow grease to clean it up and replace it. I think there may even be a probe and power cord in there, I'll have to check. So, it is free for the asking, all I ask is the "buyer" pay the shipping. I'll box it up real well so it won't get wrecked. Thanks, Chris Beck West Bend, Wis. ____________________________________________________________________ Get your own FREE, personal Netscape WebMail account today at |
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Hello everyone @ tekscopes
Stuart Hellier
I have been looking for other fans of vintage tektronix stuff for
ages! I have an old 545b unit with ca dual trace plug in module, but I have a few problems with it & have not been able to find a service manual. I am a sound engineer from the U.K & no one seems to know much about old tek gear (including tektronix U.K)! So if any of you guys could lead me to any technical data or service manuals, it would be most helpful. I checked out the SND tube sales site the other day & discovered that Tektronix used to make a valve curve tracer (the 570). I do quite a lot of work on old valve equipment, (usually fixing guitar amps for friends) & it would be great to test the valves I have to see how well they match. Many amps that come in have an assortment of valves where one has been replaced when it has finally expired instead of a new matched set being fitted. Thanks to stefan for the T & M museum, theres some useful & interesting stuff in there, & I enjoyed looking through the exhibits. Bye for now, I shall log on again soon! |
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