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I am looking for Tek part number 012-0403-00. This is the twin cable set for the Tek 7D15 plug in. These are BNC to Sealectro cables. Either that or a source and/or part number for the Sealectro plugs and I can make my own cables. Thanks in advance for any help, Don

Dear sirs, Is anyone in the possession of Tektronix manuals and especially for the type 468? Kind regards, Zorrooo

I have a pair of Tek 502As (nice blue dual-beam, 1MHz, hi-sensitivity diff. inputs). One is the older style, with ceramic strip construction of the input amps. Space is tight, and I'm thinking of stripping this one for parts, unless someone wants to offer me a decent amount for it (manual can be included)... ----------------------------------------------------------------- Michael Dunn | Surround Sound Decoder & Stereo Enhancer 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 | http://www.cantares.on.ca/ -----------------------------------------------------------------

Hello! I need a tunnel diode to save my Tektronix 485... it is Tek part number 152-0177-002 (tunnel diode, 10mA +/- 0.5mA, 2pF) Please, let me know if you can help me. Thanks! JOSE ---------------------------------------------------------------------- 73 EB5AGV / EC5AAU - JOSE V. GAVILA La Canyada - Valencia (SPAIN) EB5AGV Vintage Radio Site: http://www.geocities.com/eb5agv European Boatanchors List: http://groups.yahoo.com/group/euro_ba_swap

I didn't realize this group existed...stumbled into it by accident. Are there any other groups/reflectors for Tek scopes and probes? Terry

I need the rear plastic cover for a 2235. Could swap other parts from a 2235 just to make it interesting (front cover, handle, misc. circuit boards, components???) or Federal Reserve notes if you insist. Also, has anyone found a source for that magic blue paint they used on the covers? I could use a can or two of that too. Thanks Rick rdavis@...

I do have a the rear apron for a 2235 (actually, all from that series seem to fit, 2215, 2235, etc.) and can swap for other parts, the blue paint I got a while back from Tek for an astronomical price, and it came in a bomb-proof container, shipped as "hazardous materials". I don't recommend that route. However....all is not lost. The paint comes in a can marked "Omni-Pak", and is identified as L61 Opex lacquer, L99XXL42, Tek Blue. it also says, Portland Commercial #4383, and To Re-order, call (503) 249-0222. Try that! Should be a LOT simpler. We have loaded a huge number of Tek parts on line in the last month, semis, pots, CRT's, and cross-ref data where available to our site. Have a look here: http://www.sphere.bc.ca/test/index.html have a look if you have time. regards, walter

I finally got tired of tripping over an R7704 hulk I had laying around. I decided to strip it down, and see if I could find homes for the various parts. If you have an R7704 (and I suspect 7704, but not 7704A) and need some parts let me know. If I have it, I'll send it to you for the cost of postage. The unit didn't work well enough to test the CRT, but the filament is good. Also, the HV supply appears to work; as I was getting some arcing when I disconnected it after applying power to see if I could get a trace on the CRT. I did not save any of the metal frame except for the front panel. 73 - Mark N1VQW

Geez, somehow I've ended up with three 1GHz sampling plug-ins. The 1S1 is semi-working after my restoration attempt. I don't think it's fully happy with my Schottky GaAs subs... Newly acquired is a 3S76 (2-chan!). Does anyone have a manual to sell or partly copy? Unfortunately, I think it needs a companion 3T77 to operate. Otherwise it's in good shape. Maybe I'll harvest some GaAs diodes from it! It has TWO connectors on the rear-panel in a "T" layout, whereas the scope bay just has one. Does this require a special mainframe, or is the second connector for testing or something? Or, is there a special cable or board that connects it to the 3t77? Also new -- a 7S14! A real beauty. Two channel, with timebase. And..... It works :-) Mostly anyway. There's a bit of lumpy noise in one trace, and the buttons are all pretty sticky. So, any recommendations for cleaning and lubricating those 7000-series buttons? Oh, I wouldn't mind a manual for this one either. Guess it's time to build me some crude 50:1 or 100:1 passive probes! Oh, the delayed timebase ring is also missing. I've seen a picture of this - a rare example of really bad design from Tek as far as I can see. The pointer for the delayed setting is on a ring just like the main pointer, but smaller diameter. The 2 sweep knobs are normal concentric ones, and said ring is attached to the "upper" knob by a couple of fragile looking plastic ribs that travel down to it down the sides of the main knob. Seems to me that the first time you turned the MAIN knob a bit too violently, your fingers would tear off those ribs! Michael Dunn (the original ;-) p.s., TekScopes continues to grow well. We have over 60 members now. Soon it will be my most populous group. We should throw a party or something. ----------------------------------------------------------------- Michael Dunn | Surround Sound Decoder & Stereo Enhancer 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 | http://www.cantares.on.ca/ -----------------------------------------------------------------

Stan (or others), you have helped me with this scope just recently. I picked up an original users manual which is great! But, my scope has just started giving me trouble with Ch1. When I turn the unit on, and even after an ample warmup period, the Ch1 trace doesn't show up. I locate it with Beamfinder but can't get it stabilized on the screen. When I can get it to position, it continues to drift vertically, both up and down, and will not completely stabilize (even after 30 minutes or more). That is with leaving the Volts/Div control in the same position. Any ideas? Also, I discovered the Ch2 Cal control has absolutely no effect. I can't find a detent position either. I thought it might be a loose knob but that wasn't the problem. What do you think? Thanks, much. Terry

What is the best way to get a service manual for a 7104. Thanks __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/

Hi Nick, There is a list of vendors of Tek manuals at our web site. Try this URL: http://www.reprise.com/host/tektronix/resources/manual_sources.asp If none of those guys can help, there is always eBay . . . Stan w7ni@... nick weyland wrote:

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...

Referring to my other post "tek 475 vertical position pots", I am now required to dismount those pots. To do it (the one for channel 2 in particular), I have to remove the vertical amplifiers board. What I am afraid of is that it seems I have to desolder two resistors having one lead on the borad and one on the VOLTS/DIV rotary switches. Can I do it safely? Anything to be aware of? Furtheremore, how can I safely dismount the BW/TRIG VIEW command shaft from the switch it is linked to? Is it sufficient to unscrew the tiny screws? Thank a lot ciao

Vertical position pots on my tek475 are so noisy to make my scope almost unusable. Any suggestion on refurbishing those pots? They are two sections pots, can I try to use the unused section? Any source for them? Thank a lot ! ciao ===== Emanuele Girlando (IW1DHI) http://space.tin.it/clubnet/egirland __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/

Hello All, Please note that this is a copy of my post in the Tektronix Reference materials forum with some comments removed as they would not make sense here. If the bookmark is not in the bookmarks section here it really should be added as they, (Stan Griffiths and Bill Den Beste) have a wealth of good information available. So here goes - It was suggested that perhaps the nuvistors in the B channel were the cause of the drift. This does seem to be the case. In an attempt to prove that case I swapped the tubes out and the drift changed channels. I have tested the nuvistors in the scope and several of them test weak including the front end of the channel B preamp which if you watch the tube test meter drifts up from about 3000 uMhos to about 7600 uMhos before dropping off sporadically. The other tubes in the scope vary from 10000 uMhos to 11500 uMhos. My question is that I seem to be having a hard time finding the 154-0461-00 part number tubes. According to the manual they cross over to an 8393 and I have found Tek part #157-0107-00 which also crosses over to the 8393. Is there a significant difference in these two Tek part numbers? Can someone tell me what the uMho readout for the 8393?s should be for this application. I notice that Tek uses two part numbers for the 8393?s in the 454 two of them are "aged" while the others are not. Will this make a significant difference in the scopes performance or will it just drift for a while until the tubes get "set in their ways" :^) Thanks for reading all this and for all your help. Paul

STunwall@... wrote: > I recently came across a working 511AD, good shape, no damage that I could > see. I have the scopes I want already, and don't want the 511 but I hate to > see it get thrown out if anybody else would want it. Just thought I'd let > somebody know about it.... > > ST > > Steve Tunwall > Project Engineer > Clear Channel Communications > 205 Ironwood Circle > Aurora, OH 44202 > 330-995-9642 > Cell 216-272-7505 > stunwall@...

Hi all, :) Not exactly a TekSCOPE, and not catastrophic, but I have a DM501A with a VERY bright LED display. A glance at the cct diagram does not suggest (to me) the possibility of adding a simple series resistor for the common side of the LED display. Anyone know enough about the unit to suggest a fix? Thanks and regards, :) Michael Dunn (the other one) <g>

I need someone to refresh my memory. The old Tek scopes with the separate power supplies (555 and similar) had an unusual filament voltage regulator that operated with a saturable core reactor. Part of the feedback circuit involved a tube that (I think) was very sensitive to its filament voltage. I have a clear mental image of the tube, it was a glass octal type with a horizontal filament and a cylindrical plate around it. I'm looking for the type number of this tube. Anybody know offhand or have a manual with this info? Otherwise, I'll probably have to wait 'til the next hamfest and see if one of the Tek manual vendors will let me have a peek. -- Thanks, John Rehwinkel KG4L spam@...