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Hi All, My name is Andrew Campbell and I live in Sydney, Australia. I am an ex-Tektronix employee (Feb this year) and I am now working for another company. I'm into repairing and calibrating 'old' tek scopes. Great to finally find a discussion list, hopefully I'll be of some help to someone out there and that there are some of you that may be able to help me. Look forward to being part of this group. Regards, Andrew

dhuster@... wrote: ... > And regarding nuclear research, I remember a field engineer telling > me about selling a lot of transient digitizers to the nuclear > research community. They'd put a TD down a hole with a bomb with the > cabling leading to the blockhouse a couple of miles away. They'd > blow up the bomb and the TD would send the signal out of all the > stuff they were monitoring -- about 1???s before it went into total > meltdown -- and then in the blockhouse monitoring station, they'd > wait for the signal to show up and then after it was captured, high- > speed clamps shut the lines down so the the massive EMP that was > right on the tail of the data didn't totally destroy all the > monitoring equipment. But the poor transient digitizers .... they > got to make one and only one measurement in their entire lives before > that serial number ceased to exist. Danged expensive probe! > > Dean Concerning 'strange' uses of TDs: I have a problem with a 7912AD which apparantly has been used in the Sandia National Labs (it has a Sandia cal sticker from 1993). While repairing the power supply, I got some fine light brown dust present in the supply on my fingers. After some minutes I had the impression that the dust warmed my fingers up, I also had a salty taste in my mouth after working on the supply. I let the TD run for some time with the case open, and the TD's fan obviously spread some of that dust inside the room I normally work in. During the weeks which followed, after being some hours in the same room, I got a slight headache and nausea unless I opened the door for letting fresh air in. The problem is that I neither know if this dust is bad for my health, nor what to do to find out what the dust is. Does anyone have a clue what it might be, or has anyone ever seen something similar? Laurent Lamesch

If you know someone with a geiger counter, it might be a good idea to go over that instrument with it . . . just as a precaution, you understand. This is a serious suggestion. Stan w7ni@... Laurent Lamesch wrote:

Laurent Lamesch wrote: I'll try the e-mail response this time; can't get to Yahoo at moment - and post this later, if it doesn't show up on web: WHERE is ".lu" ?? RUN, do not walk - to somewhere local where you can borrow a geiger counter. If you can't find one, I can send you a Monitor4, about the size of a calculator -- but that will take DAYS - depending upon where .lu IS. If there is a Radiation exposure .org nearby or even many miles away: CALL THEM NOW !!! SWAB your entire body with damp paper towels and put these in Ziplock bag. Have your family (?) do likewise - it may be a false alarm and your symptoms (of flu, etc) merely coincidence.. but the salty taste is hardly likely from 'flu'. SAVE all dust in a Ziplock bag. *BAG that counter* and maybe tape the door to that room SHUT, pending more INFORMATION. I spent one career in physics research / accelerators: you are describing symptoms of a possibly Bad emitter of betas and gammas - IF>> alphas also are present: HOPE you did not touch your tongue, eyes with your dusty fingers.. Outside body, alphas are not much of a problem; typ. a piece of paper will shield from their also massively *greater ionizing power*: they are Helium nuclei, after all = Heavy. This is an EMERGENCY SITUATION, IMO and from what you said. I will cc: this to your e-mail as well as the forum. E-mail me for a phone exchange, when you get this. Sounds as if you are unaware of some radiation basics, which you next need to find out. SAVE everything you had that equipment around since purchase - packing, RECEIPTS etc - IF your instinct is right and the symptoms too - someone has made an utterly UNACCEPTABLE ERROR, beginning with SANDIA LABS, who may be paying your air fare for decontamination. They may be NEXT place you call, after local help... In haste, Ashton ex- Lawrence Berkeley Lab.

Hello all, My first post to this very interesting newsgroup, so I hope this message makes it out ok. I would like to acquire any of the following parts for a standard 465B. My scope was rescued from the dumpster (!) and is completely refurbished save one each from this list: PN 131-1428-00 CONTACT,ELEC:GROUNDING CLIP Bottom board HV shield to "can" contact. PN 352-0263-00 HLDR,POUCH ASSY: Blue plastic piece at the front top of the "can". PN 378-0044-01 FILTER ELEM,AIR:2.5 X 2.5 X 0.25 Air filter element. The plastic pouch holder piece is the most important to me. Anyone out there parting out a 465B, perhaps with an otherwise unuseable can? Next question has to do with a different animal altogether, a Tek TAS 465. I will probably regret combining these two instruments in one email due to the confusion over the shared numeric designator. I have acquired (another "free to a good home") broken TAS 465 100MHz 2ch analog scope and with it came an instruction manual (070-8523-03). This manual has very limited service info. I would like to confirm if a separate service manual exists? Would anyone have one to sell? I've tried the usual manual sources (except Tek). The serial number on this scope is BR10900. I know that sounds odd, but that's what is on the label. Would anyone also know what "BR" signifies in the serial number? Perhaps it wasn't made in Beaverton.... Thank you. Don

Two-part query: Would a 1M1 Test Unit plug-in be a useful tool in checking and setting up out a long-disused 545A scope? I have the plug-in but am not sure of its intended application. Does anyone have a 1M1 manual (or copy of same) for sale? Marc Ellis

Hello Dean, I remember the Filter-Kote (milky water-soluble oil?) days for the metal filters in the 5xx scopes (!) I've been cutting up the open-cell foam intended for use as filters for air conditioners - for the 4xx series. It's usually grey and about right thickness to stay in place. Really cheap too - maybe $1 for a humongous sheet or 2. After a few washings, just toss and snip out another. (Seen quite a few 4xx scopes of late - with the filter left out. Maybe they just didn't know..) Just a thot. Ashton

What does a 3C66 carrier amplifier do, or what do you use it for? Thanks! George

Hello, Would anyone have a vertical output hybrid for a 7844? Tek part 155-0064 I believe... If anyone has a 7844, I can email them the necessary pictorial info where the part is and how to remove it (it's a 5 minute job). Any reasonable price considered! Thanks, ZN

Hello, if anyone has access to or knows a source for the following 466 parts, I would be grateful: - (2) A&B trigger level knobs #366-1280-00 - (1) B trigger slope knob #366-1278-00 - (1) vertical position knob #366-0494-00 - (1) extension shaft for vertical position knob #384-0442-00 Thanks in advance. Bill

The pot/switch for the CAL/VAR volts on Ch1 of my 2230 is disfunctional and there is no detent. Manual says 311-2218-00 Tek part number, but it describes it as an Allen bradley 10K pot with a DPST,etc. Sounds off the shelf but can't be sure until I dive into it. According to the manual it sounds like a MAJOR job. Does anyone really no if is a standard POT? Help appreciated Vince __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/

Hi All, I am looking for two (2) Tektronix 475 Position Pots. Tektronix Part Number 311-1411-00. Regards, Andrew Campbell Calibration and Repair Network Pty. Limited A.B.N 64 090 761 363 An ISO9001:2000 Quality Certified Company Licence No. QCC 716 Bldg. T2A, Nirimba Education Precinct Eastern Road (P.O. Box 147) Quakers Hill NSW 2763 Australia Ph: (02) 9853 3259 Fx: (02) 9853 3258 Email: service@... Web: www.candrnet.com.au

Good Evening I have a 7704A mainframe that is in need of repair. I turned it on this morning after not having been powered up for about 2 years. The trace was moving around erratically. Then I heard a sizzling sound (never a good sound) and immediately turned it off but not before a whisp of smoke emerged from the bottom of the scope. I live in the Atlanta metro area and would like to find a company or individual who is able to repair it. Also I am in need of a horizontal sweep module. I'm not sure what model I am looking for. This scope will be primarily used for audio frequency applications. Any hints or suggestions would be very helpful. The modules I have are 2 7A26 and 1 7A16P that is also in need of repair. Any help would be greatly appreciated. Thanks Bob

Hi all, :) A couple of times recently there have been mentions of people who hold some stocks of Tek parts for sale for replacements. (e.g. pots, transistors, tubes etc). After a recent rebuild (hopefully the last) of this computer, I have unfortunately lost the message/s containing this information, and I may need some parts for a friend's 454. It seems that it might be a nice idea if there was a list of these people or organisations, either posted semi-regularly to the list, or on a web site somewhere. Does this list have a "parent" website? Or is there a list of relevant sites somewhere? I have unfortunately lost my old "bookmarks" list as well, but I know that some of the list's contributors have "Tek" sites, which I have visited... Can anyone help...? Thanks in advance for any help, and regards, :) Michael

Hi, Would the person that responded back to my message concerning the communication options for the TEK 2230 please respond again. I can't seem to find your message. Thank you, Vince __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/

Seconded - before I acquired 7B87, later -92As via a package deal: a 7B53 in my 7854 (400 MHz nom) scope worked fine. At fastest sweeps, with a known ~700 pS risetime pulse - yes, you can see some combo of delay-line (absent or mismatched?) aberrations on trace start; IIRC maybe an almost double-pulse clearly "not happening". So all one needs to remember is: Stay away from <10 nS/DIV - it isn't 'sposed to be linear down there.. Audio is almost DC. And as Dean observes, the built-in dual timebase gets you delayed sweep w/o wasting a compartment. (Still.. it's fun to see the readout say, "500 pSec" on the -92s - and realize it's even true within 3-5% !! One gonzo ramp generator, to use the technical term ;-) Maybe sometime I can steal a 7104 / 7B10 and see: "200 pSec/DIV" !! As Spock might say.. fascinating Ashton

Hi, I am looking for a manual for a Tektronix 1L20 Spectrum Analyzer plug-in. I believe it is used with the 555 Scope? Regards, Andrew

does anyone know how i can get a hold a tek 2221 tek service manual. thanks, sid

need help on repairing the time sweep for tek 321a-everything else works. thanks, sid

Hi All, Does anyone know of a company or business that may be able to supply boards for the Tektronix TDS model oscilloscope. They could be boards that have been pulled from non-repairable instruments. Tektronix has recently removed from their "Long Term Support Program" a variety of early model TDS oscilloscopes. In particular I am interested in obtaining TDS540 Acquisition Boards and TDS540 Processor Boards. I have recently tried Verizon (GTE) and they won't part with boards, they want me to send in the instrument for them to survey. Not a good option from Sydney, Australia. Best Regards, Andrew