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Re: Hello-Tek Scopes, Manuals, and Parts
Hi Andrea,
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The switch you are looking for could be obtained from almost any 2 or 3 series dual trace plugin such as a 3A1 or 3A6. That ground/AC/DC switch is the same in all of the units except for some are douple pole and some are single pole. The 3A72 only nees a single pole so either switch would work. Jim --- Andrea Bovo <ivbov@...> wrote: ----- Original Message ----- __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger |
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FAA story
Windsor
Hello,
Great story about FAA/gov't mindset. Reminds me of the story I heard about a company upgrading their servers and the sales guy recommended using linux and saving a big bundle of cash and improve reliability. But the company decided to go with a Microsoft solution because the linux system was saved them too much money. Something to do with a tax deduction. Windsor Chan _______________________________________________________ Get 100% FREE email for life from Excite Canada Visit |
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Re: 465M Flaky vertical height.
Thanks Stan
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I'll give that a try. I always like to ID the problem to insure I fixed it, but in this case it's probably too intermittant to hope for that. Peter Florance CET/CSM Audio Services 544 Central Drive Suite 101 Virginia Beach, VA 23454 757.498.8277 757.498.9554 Fax email: mailto:audserv@... -----Original Message-----
From: Stan or Patricia Griffiths [SMTP:w7ni@...] Sent: Monday, July 30, 2001 3:54 PM To: TekScopes@... Subject: Re: [TekScopes] 465M Flaky vertical height. Hi Peter, I have fixed quite a few 455's with intermittants and the 465M is very similar in construction. I have found both of the mother board connectors that the vertical and horizontal modules plug into to be intermittant. I would remove both modules, clean the board contact area with something like alcohol, and then apply a light coating of De-Oxit on the board contact area. Stan w7ni@... Peter Florance wrote: This one has bothered me for a while. Sometimes the height will be about 50% To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to |
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Re: 465M Flaky vertical height.
I noticed the 465M is quite different from 465.
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Is the 465 a better scope? Thanks for all the help Peter -----Original Message----- |
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Re: CONTACT CLEANER - note Cramolin Red is 'Tweek' (!)
John and all
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I know the Deoxit is not conductive like Tweek seems to be but is more than a straight solvent or lube. We buy both the spray and the 100% liquid in the bottle (like a flux bottle). Sometimes the killer fix for pesky assign switches on mixing consoles) is to dispense a little 100% (kind of thick), then 'chase' it with a little 5% spray which carries it deep into the switch. You can see the results watching distortion components THD from analyzer on a scope. Instantly gets quiet. One time a local supplier sent us off brand Deoxid (instead of the Caig Deoxit) and it just didn't work. 100% is also great for scope switches. Years ago I bought a batch of Military Dumont scopes and it worked wonders on the switches. Even the nasty cal and balance pots. Only caution is pots with HV in them like some focus pots. Seems to make them a little cranky (low dielectric strength?). Deoxit got a real bad reputation when music stores started selling it and every DIY musician flooded his gear with it. Slimy mess. I have a 20 yr old BMW and the Caig calube with copper particles it a godsend for crappy German grounds (some painted from the factory). Technician-in-a-can, we call it. Funny about the red juice and blue juice. I read the speed cleaning book years ago when they used that as generic name for off the shelf cleaning aids. Apparently the book didn't stick with me, looking around the room right now... Peter -----Original Message----- |
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Re: CONTACT CLEANER - note Cramolin Red is 'Tweek' (!)
John Miles
Actually "Tweek" is an entirely different (and vastly more expensive)
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substance, which is OEM'ed under the name "Stabilant 22." () Tweek/Stabilant is billed as a contact enhancer -- not merely a lubricant, surfactant, or cleaner like DeOxit/Cramolin/WD40/whatever, but rather an actual aid to conductivity. Supposedly, the idea is that Stabilant behaves as a good conductor across extremely small metal gaps -- on the order of thousandths of an inch -- while acting as an insulator across larger spaces. This is what the guys on the Ferrari list say, anyway.... some of them have been using it on the badly-engineered fuse panels in the older cars with good results. I haven't tried it myself, because the price ($20-$50 for a couple of milliliters) and marketing claims make it sound like 99 44/100% pure snake oil. Now, I have taken Tek 7000 plugins apart and noticed a somewhat gooey, clear substance in the transistor socket pins that matches the look and feel of Stabilant 22. Don't know if it was applied at the factory (which would certainly lend a lot of credence to the snake-oilish claims above) or by a third-party service person. Anyone have any knowledge of this stuff... preferably accompanied by a few numbers? Ever heard of Tek using anything like this on the production line? -- jm ----- Original Message -----
From: <ashtonb@...> To: <TekScopes@...> Sent: Sunday, August 05, 2001 3:05 PM Subject: [TekScopes] Re: CONTACT CLEANER - note Cramolin Red is 'Tweek' (!) That is: the active ingredient is same - made by Wright (audio type and inventor? discoverer? of the phenom) in Canada. Tweek was first and invented that T. They fought, and Caig was enlisted to catch up in 'marketing'. Anyway it is the surfactant which produces the long-lasting 'miracle intermittent' cures - whatever the label logo or the diluent decided on. Sometimes brush applicator beats spray - matter of choice. FWIW. Ashton --- In TekScopes@y..., jstanton@v... wrote: For many years we used a contact cleaner "Cramolin Red" which usedto be distributed by Caig. I went searching for new supplies and discovered that Cramolin is actually German and that Caig's Deoxit is actually their knock-off of Cramolin and is probably just as effective. was plagued with intermittent faults became totally reliable after it was disassembled and all connectors and contacts treated with the Cramolin Red. More recently I have been able to resurrect some Tek plugins and frames that had been stored in a hostile environment by first cleaning switch and other contacts with isopropyl alcohol to rinse away water and alcohol contaminants and then applying Cramolin to attack the oxides and leave a protective, conductive lubricant. This process failed on equipment that had clearly been underwater so dont expect the impossible. sample kit and shall compare it to my Cramolin Red dregs and report the result. has been with labels. I find the following method works: 1. Heat the label and attempt to peel it off.dislodge it. This is a mild solvent that seems to be kind to plastics. 3. Add some WD40 if it is stubborn. This is a strongersolvent so take more care with it. 4. Aged label adhesive sometimes still resists and thenI carefully use some nail polish remover if there is metal or anodizing underneath, using a moistened pad like an art restorer. 5. On a painted or plastic surface where acetone cannotbe used remnants can be removed with a scraper using a similar technique one might use to scrape a bearing or a lathe bed (i.e. no gouging). 6. Finally clean with a pure water and "Red Juice"solution. Red Juice is an industrial cleaner that we use and source from "The Clean Team" in San Francisco. It is a detergent without other additives and leaves no residue, no pine smell, just clean. They also make "Blue Juice" which is great for cleaning glass. To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to |
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Re: CONTACT CLEANER - note Cramolin Red is 'Tweek' (!)
ashtonb@jps.net
That is: the active ingredient is same - made by Wright (audio type
and inventor? discoverer? of the phenom) in Canada. Tweek was first and invented that ?. They fought, and Caig was enlisted to catch up in 'marketing'. Anyway it is the surfactant which produces the long-lasting 'miracle intermittent' cures - whatever the label logo or the diluent decided on. Sometimes brush applicator beats spray - matter of choice. FWIW. Ashton --- In TekScopes@y..., jstanton@v... wrote: For many years we used a contact cleaner "Cramolin Red" which usedto be distributed by Caig. I went searching for new supplies and discovered that Cramolin is actually German and that Caig's Deoxit is actually their knock-off of Cramolin and is probably just as effective. was plagued with intermittent faults became totally reliable after it was disassembled and all connectors and contacts treated with the Cramolin Red. More recently I have been able to resurrect some Tek plugins and frames that had been stored in a hostile environment by first cleaning switch and other contacts with isopropyl alcohol to rinse away water and alcohol contaminants and then applying Cramolin to attack the oxides and leave a protective, conductive lubricant. This process failed on equipment that had clearly been underwater so dont expect the impossible. sample kit and shall compare it to my Cramolin Red dregs and report the result. has been with labels. I find the following method works: 1. Heat the label and attempt to peel it off.dislodge it. This is a mild solvent that seems to be kind to plastics. 3. Add some WD40 if it is stubborn. This is a strongersolvent so take more care with it. 4. Aged label adhesive sometimes still resists and thenI carefully use some nail polish remover if there is metal or anodizing underneath, using a moistened pad like an art restorer. 5. On a painted or plastic surface where acetone cannotbe used remnants can be removed with a scraper using a similar technique one might use to scrape a bearing or a lathe bed (i.e. no gouging). 6. Finally clean with a pure water and "Red Juice"solution. Red Juice is an industrial cleaner that we use and source from "The Clean Team" in San Francisco. It is a detergent without other additives and leaves no residue, no pine smell, just clean. They also make "Blue Juice" which is great for cleaning glass. |
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Re: 465M Flaky vertical height.
donlcramer@cs.com
Fascinating!
BTW, what was the reason for creating the 465M for the government vs selling the 465? Was it a cost issue? Or some special features? Was the 455 an outgrowth of the 465M or was it the other way around? I worked in Digital Service Instruments as a production tech in the late 70s, which was a new group in Portables which began with the 851 Digital Tester. This was a product designed originally for Burroughs for their first line techs as a scope replacement. The instrument was principally a clever integration of DMM and counter/timer functions and the idea was that a tech could follow a diagnostic tree and compare readings to arrive at the fault, without the need to be familiar with how a scope worked. Anyway, we were next to the T900 line and if DSI production was a bit slow, I would get to work on T900 product. While not as nice as the "real" portables, the top line T935 wasn't a bad instrument (2x35MHz) as far as functionality was concerned. About once a month our group got to either take a tour of another area, or had a guest in, as was common practice back then in order to get more familiar with other parts of Tek. One time it was the the marketing product manager for T900. As you know, the T900 line styling was a little odd, and was derided for looking like an old Kerby cannister vacuum cleaner instead of like a traditional portable scope. The gentleman, whose name I've long since forgotten, was quite a character. He told us he wanted to do an ad with a photo of a field service tech holding a T900 in one hand and a vacuum cleaner hose in the other hand with the line "Tektronix is Going to Clean Up in the Low Cost Scope Business". But the idea was shot down. We had quite a laugh over that, and he was an inspiration for the T900 team who felt somewhat second rate compared to the groups working on the more expensive portables and lab scopes. My recollection is that were a great bunch of people regardless of what they worked on. Don |
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CONTACT CLEANER
jstanton@viacognis.com
For many years we used a contact cleaner "Cramolin Red" which used to be distributed by Caig. I went searching for new supplies and discovered that Cramolin is actually German and that Caig's Deoxit is actually their knock-off of Cramolin and is probably just as effective.
We achieved miracles with Cramolin. Temperamental equipment that was plagued with intermittent faults became totally reliable after it was disassembled and all connectors and contacts treated with the Cramolin Red. More recently I have been able to resurrect some Tek plugins and frames that had been stored in a hostile environment by first cleaning switch and other contacts with isopropyl alcohol to rinse away water and alcohol contaminants and then applying Cramolin to attack the oxides and leave a protective, conductive lubricant. This process failed on equipment that had clearly been underwater so dont expect the impossible. I notice that Cramolin is still in business. I just ordered Caig's sample kit and shall compare it to my Cramolin Red dregs and report the result. On the subject of cleaning used Tek equipment my biggest problem has been with labels. I find the following method works: 1. Heat the label and attempt to peel it off. 2. Use "Goo Gone" lemon oil solvent to attempt to dislodge it. This is a mild solvent that seems to be kind to plastics. 3. Add some WD40 if it is stubborn. This is a stronger solvent so take more care with it. 4. Aged label adhesive sometimes still resists and then I carefully use some nail polish remover if there is metal or anodizing underneath, using a moistened pad like an art restorer. 5. On a painted or plastic surface where acetone cannot be used remnants can be removed with a scraper using a similar technique one might use to scrape a bearing or a lathe bed (i.e. no gouging). 6. Finally clean with a pure water and "Red Juice" solution. Red Juice is an industrial cleaner that we use and source from "The Clean Team" in San Francisco. It is a detergent without other additives and leaves no residue, no pine smell, just clean. They also make "Blue Juice" which is great for cleaning glass. My first exposure to Tek scopes was 30 years ago when I carried a 453 to repair mainframe computers (you remember the ones that had thousands of boards and connectors). At that time we knew nothing about contact cleaners and spent endless hours tracing down faults on boards only to find they worked when reseated. Because we used no contact cleaner we would be doing it all over again in a few months time. In retrospect I realize that maybe 90% of our trouble shooting could have been eliminated by treated connectors and contacts. By the way has anyone before or since made a scope like the 453 that could be dropped down a flight of stairs, bouncing off each stair and still work perfectly? Or be in the trunk of a car when the car was totalled and still work? It is a credit to the quality of the materials traditionally used by Tek that a little TLC can bring even very poorly cared for equipment back to near-new appearance and function. Regards John Stanton |
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Re: 465M Flaky vertical height.
dhuster@pb.k12.mo.us
Peter, I agree with Stan about the intermittent tendancies of the
vertical and horizontal module connectors. The FAA bought the 465M in droves, and since their main depot is in Oklahoma City, I got to see most of the warranty work. The 455 and 465M are really "upgraded" T900-series and weren't the best contribution to the Tek product line. If you don't have the scope in its case, the traces will be pretty noisy, so don't try troubleshooting THAT little "problem". As a side note regarding the FAA, the government makes for odd equipment. The FAA used/uses a modified 535/545 scope for aligning their VOR/TACAN system sites (those funny little low white buildings you see around the country with the big bowling pin in the center). The modified scope (and this was a special Tek production mod) had a hole in the side of the scope cover with clear plastic cover ofer the hole so that a slide switch could select normal scope operation or direct access to the vertical deflection plates. They needed the mod so that they could bypass the vertical amplifier and view the high frequency of the TACAN. Of course, the 500-series was obsolete and the FAA was getting tired of spending $1000+ per instrument for refurbishment through Tek to keep the old girls going. Well, of course, since the 545, scope bandwidths have improved a lot, and the late Harold Drain, the OKC sales rep, and I went out to one of the FAA's sites to demonstrate how an inexpensive, modern Tek scope could easily and simply be used for this procedure without having to mess with the cost of a special modification. A new scope was going to cost them less than their typical 545 refurbishment. They were delighted and and Harold and I figured that he was going to be into bonus money with all the sales of new high-bandwidth scopes this was going to generate. Ha! We forgot that we were dealing with the U.S. Government. Instead, they ordered a whole slew of 2213's with the identical direct deflection plate access production modification that the old 500-series had. Seems that they figured that it was better to do that than it was to modernize and rewrite the adjustment procedure and retrain the old dogs that maintained the systems. So if any of you out there ever get hold of a 2200-series scope on the surplus market with a Plexiglas-covered hole in the left side of the case, that's the history of the abortion setting in front of you. Dean |
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Re: Tek 465B
dhuster@pb.k12.mo.us
Dave, considering what they were, the blue implosion shields were
some of the most expensive mechanical parts you could buy from Tek. I always kept the ones I replaced on the service bench, but they were always scratched up and I usually ended up cutting them up and using them for dividers in my parts cabinets drawers. As for knobs, the 465B, 465, 475, etc. use similar knobs. Let me know via e-mail which ones you need and I can probably scrounge up some. The knobs I have are mostly for fixing you up if you are missing knobs. If you're looking for cosmetic upgrades, my knobs may not be much of an upgrade. Dean |
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Re: 465M Flaky vertical height. And "Tweek" cont. enhancer.
ashtonb@jps.net
--- In TekScopes@y..., Miroslav Pokorni <mpokorni@c...> wrote:
Thank you, Peter. Information on MCL would be handy one day, too.vials of products for $10.I have used the Caig products with some success too; handiest where access is so restricted you can only spray, twist knobs a lot and - blow out with air. 'Tweek' I have also used since ~ '83. It is a 'surfactant' - has some detergent properties but, it's major feature is that it is slightly 'oily' and, under pressure - it is a conductor! (demonstrated via a daisy-chain of BNC adaptors + a milli-ohm bridge). In brief, at the high micro- local pressures of a contact, it "fills in the gaps always present in any surface" with a conductor, yet does not degrade even hi-ohms substrates. I think.. it's still distributed by Sumiko, Inc. in Berkeley CA. Small 'nail-polish' type applicator of the ingredient in v. pure iso-alcohol. (It's very expensive! pure, and a little does a lot). Hi-end audio shops have carried this in past, but I've been out of touch lately. It has SYA many times, especially where a known flaky connector is on a production board which can't be removed without consequences (or a replacement connector can't be found). There are many anecdotes of "miracle cures" for hair-pulling intermittents... Bon appetit. Ashton |
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Re: Correction-Re: Info on 561B wanted
We have had very good luck with the 561B Scopes. The
mainframes are transistorized and don't seem to have power supply problems like the tube models, especially the HV. They also have very good traces on the CRT. Don't let the tubes in the plugins scare you. E55L/8233's aren't worth much. I have good used ones (I have a tube tester that tests the duo-decar type tubes) in abundance and more plugins to get them from. The scopes are very good for audio type work and general service. I got about 12 561B's that were like new in consecutive S/N order about 10 years ago and the ones left always seem to work when powered up (except for some dirty switches). I have some of them left with plenty of plugins available. Also have manuals. The 3A6 dual trace vertical plug has the delay line built in so you can see the leading trigger edge of the signal. The 3A1 does not. Sampling plugins will take the bandwidth higher but the sampling heads usually cost more than the plugins or scope. Let me know if you need any info on certain plugins. Either I have it or can get it out of an old Tucker catalog. Jim Tucker's catalog had nice listing of most of the plugins with specs. Regards Jim --- "Steve B." <baldy3823@...> wrote: --- In TekScopes@y..., "Steve B." <baldy3823@y...> __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger |
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Correction-Re: Info on 561B wanted
--- In TekScopes@y..., "Steve B." <baldy3823@y...> wrote:
1: The fastest amp P-I's (3A1 & 3A3) use expensive and failure-That is 3A1 and 3A6 10 mHz D-T amps that use E55L (3A3 is a D-T 500kHz diff amp w/different dfl driver tube). Rgds; Steve Bringhurst |
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Re: Info on 561B wanted
Hi Collin;
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The 561B is a all-solid state 10 mHz mainframe with near identical X- Y characteristics that takes a wide variety of 2 and 3 series plug- ins. It can be used for X-Y display with similar phase comp'ed amp plug- ins or raster display with two time-bases. It is noteably a very versatile audio use 'scope with the right P-I's. Downsides known to me; 1: The fastest amp P-I's (3A1 & 3A3) use expensive and failure-prone E55L tubes. OTOH, the 63/2A63 diff amps are fine for audio and are simple units using common cheap tubes. Easy to comp for X-Y. 2: The HV osc xistor is reputed high failure rate, necessitating a mount mod to replace with a more robust device when it does go. Otherwise, very stable reliable unit w/ a nice built-in 1kHz calibrator. Rgds; Steve Bringhurst --- In TekScopes@y..., enjamp@y... wrote:
Hi, my name is Collin Ross and I have been a member for about two |
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Re: Hello-Tek Scopes, Manuals, and Parts
Let me check on the switch for your 2A72 plugin (I
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believe it is a 3A72)and a plastic bezel insert. I have about 20 rackmount 560 series scopes I can get parts from. Regards, Jim --- Andrea Bovo <ivbov@...> wrote: ----- Original Message ----- __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger |
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Re: Digest Number 161
Hi Paul,
I don't have any 561S scopes or the two plugs mentioned. I do have some of teh common sampling plugs such as 3S2 and 3T2. Let me know of any particular units you are looking for. Regards, Jim --- Paul Edstrom <pauledst@...> wrote: Welcome to the group! (From another newcommer) __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger |
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Re: Hello-Tek Scopes, Manuals, and Parts
Andrea Bovo
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From: <nfeinc@...> To: <TekScopes@...> Sent: Thursday, August 02, 2001 6:46 PM Subject: [TekScopes] Hello-Tek Scopes, Manuals, and Parts Hello, I am Jim Reese from Ohio. ...Hello, Jim some time ago I saved a Tek 564 storage scope from an inglorious end, as it was destined (from a school laboratory, where it had not been used so much) to the waste-basket. As a matter of fact, the scope is physically in very good order. On it are mounted a 2B67 time-base unit and a 2A72 amplifier unit. To restore its cosmetical original status, I need one of the two three-position slide switches that are on the front of the 2A72 unit , and a new translucent screen with the fluorescent reticular frame, which I incautiously damaged while cleaning the scope, after its salvation. Moreover, the scope works, but it's definitely uncalibrated. So, I'd like to know if you can directly be, or if you can indicate to me, the source from where I can obtain the missing items I listed, and an operation and service manual (to be instructed about calibration). Thanks in advance. I apologize for my unprobable English. Greetings. Andrea Bovo. |
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Re: Hello-Tek Scopes, Manuals, and Parts
Mike McCauley
Hi Jim,
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Thanks Im trying to complete my collection of 7000 and 500 plugins, not many 7000's to go, but a few 500's and Im now looking at the 5000 series. They really are a fantastic set of instruments, I want to have one of each for posterity sake. Anyway, heres what Im looking for, plus I need manuals for most 7000 and 500 series. Cheers. 7000 series: 7A11 7A22? 7A42 7D10 7K11 7L12 7L13 7L14 (actually just need a new YIG oscillator for this one) 7L18 7D02 personality modules PM100, PM101, PM105, PM402? 500 series: AA501 AM502 AM503 probes A6302, A6303, A6304XL, or A6312 AM511 DC509 DL502 DM511 DP501 FG507 LA501 MR501 PS505 RG501 SG505 SW503 TR501 TR502 TR503 WR501 TM5000 series: AA5001 CG5010 Calibration Generator DC5009 DC5010 DM5010 FG5010 PS5004 PS5010 MI5010 On Friday 03 August 2001 11:11 pm, you wrote:
Hello Mike, |
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Re: Digest Number 161
Paul Edstrom
Welcome to the group! (From another newcommer)
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I've been lurking for some weeks now. My collection of Tek has been growing over the last several years thanks to ebay and other sources on the Web. Also, especially to Stan G. and Deane K. for manuals! I'm mainly interested in the era of Tek stuff covered by Stans book not including 51x, 52x, 53x or 54x series. I especially like to work witk the 56x scopes and their plugins. I recently acquired a 561S manual which describes a 25 mHz system including a 3A1S and 3B1S. I'd really like to acquire this hardware! I also want to learn more about this system as the catalogs I have don't mention it. Paul Edstrom Stanchfield MN (50 mi N of Mpls)
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