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Re: Just call me Mr. Sampler (and button question)
Stan or Patricia Griffiths
Hi Michael,
I have made a few comments below: Michael Dunn wrote: Geez, somehow I've ended up with three 1GHz sampling plug-ins.I haven't ever tried this so you could be right . . . Newly acquired is a 3S76 (2-chan!). Does anyone have a manual toCheck out the list on my web site at <www.reprise.com> Unfortunately, I think it needs a companionThe 3T77 is one timebase that will work with the 3S76. You are right that there MUST be a sampling timebase to operate with it. Others that will work with the 3S76 are 3T77A, 3T4, 3T2, and maybe 3T5 or 3T6 (I have never tired these with a 3S76 but I know of no incompatibility). Otherwise it's in good shape. Maybe I'll harvestI think the GaAs sampling diodes used in the 3S76 are the same as those used in a 4S1 but I can't remember for sure. I would have to check manuals to be sure. I know the ones in the 1S1 have different part numbers but maybe you could make the 3S76 diodes work in a 1S1. That is another good idea worth exploring. Remember, don't handle the sampling diodes with your fingers. Grease from you fingers will contaminate them and attempts to clean them with alchohol have been only marginally successful. Also, don't chip the black paint they are painted with since this will allow light to reach the junction and that ruins them also. I don't know the exact nature of the failure of sampling diodes due to exposure to light but I understand it is permanent. Many sampling diode problems are related to improper diode handling techniques. When a technician first hears he can't handle them with his fingers, he uses his needle nosed pliers and chips the paint . . . then he realizes what those special plastic tweezers that Tek used to ship with new diode sets are for . . . It has TWO connectors on the rear-panel inThe second (vertically oriented) connector is for feeding digital information to the 6R1 or 6R1A Digital Readout unit when the 3S76 is used in a 567 mainframe. It may also work to feed readout information to a 230 when used in a 568 mainframe, but I have never tried that combination before. It connects to nothing when used in a non-readout scope like a 561A or 564. Or, is there a special cable or board that connects it toNo. It doesn't connect to the 3T77. It connects to a 6R1, 6R1A, or maybe a 230 or nothing at all. Also new -- a 7S14! A real beauty. Two channel, with timebase.I just haven't ever had a chance to spend any time with a 5S14 so I don't know didley about it. Michael DunnI hope this helps some, Mike. Stan w7ni@... |
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2235 rear cover - -Many parts on line, all about PAINT!
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: have a look if you have time. regards, walter |
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Just call me Mr. Sampler (and button question)
Michael Dunn
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 | ----------------------------------------------------------------- |
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Re: Rear cover 2235
Stan or Patricia Griffiths
Hi Rick,
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Tek Blue Paint. I have a few spray cans of this stuff made up occasionally at the same place that makes it for Tek. I sell it for $15 per can and one can will do about 3 whole scopes (depending upon if you paint the inside surfaces of the covers or just the outsides). If you are going to spray over plastic, you can do it, but since the paint is lacquer, it tends to attack plastic. You just do it quick and leave it alone . . . Stan w7ni@... Rick Davis wrote: I need the rear plastic cover for a 2235. |
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Re: I Found The Group!
Terry Brown
Thanks, Stan. Yes, I did find your site. Excellent material and I have
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posted a question or two on the Forum. Keep up the great work and expand the site...especially the "Bench" area so us rookies can learn all kinds of neat things to do with our 454's. Terry Stan or Patricia Griffiths wrote: Hi Terry, |
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Re: I Found The Group!
Stan or Patricia Griffiths
Hi Terry,
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I don't know of any other groups like this one dedicated to Tek scope, but you should look at my and Bill DenBeste's web page at <www.reprise.com> if you have not seen it already. We have BIG plans for that site. All we need is the time to implement them. Keep watching . . . Stan w7ni@... terry.brown6@... wrote: I didn't realize this group existed...stumbled into it by accident. |
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Re: Rear cover 2235 and Tek Blue paint
Michael Dunn
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----- Original Message -----
From: "Rick Davis" <rdavis@...> To: <TekScopes@...> Sent: Monday, March 05, 2001 11:40 PM Subject: [TekScopes] Rear cover 2235 Also, has anyone found a source for that magic blue paint they used onHmmm... can't help you with the cover, but I found a reasonably close match for the blue paint among the auto touch-up spray cans... Kind regards, :) Michael Dunn (the other one) |
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Rear cover 2235
Rick Davis
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@... |
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NEED Tek 485 tunnel diode
JOSE V. GAVILA (EB5AGV/EC5AAU)
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: European Boatanchors List: |
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Who wants a 502A?
Michael Dunn
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 | ----------------------------------------------------------------- |
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RANTS!
Michael Dunn
This is to officially announce the posting of my RANT page. If you care, here's where to find it:
As the heading says: Okay, I'm giving in to self-indulgent rambling. Here's my long-awaited list of Rants, Screw-Ups, Scams, Stupidity, and sundry Bad Things, for your amusement and my mental health. Sorry about the pictures. Only about 250K total... md |
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"Bookmarks" at the Yahoo site
Michael Dunn
One of the features of the TekScopes site at YahooGroups is a "Bookmarks" section, where we can enter web links of interest. Walter has already put his site address there. Anyone else with a Tek-related site -- feel free to put yours there too!
----------------------------------------------------------------- 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 | ----------------------------------------------------------------- |
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New group features
Michael Dunn
As some of you already know, eGroups has now been folded into the Yahoo groups family. If you're solely an e-mail user, don't worry, you don't have to change anything.
If you use the web site, you'll probably need to do some housekeeping next time you connect. It's not TOO painful. The good news is, there are some new and useful web features: 1. When looking at the message list, you can expand it to show the full text of messages, not just the headings. Almost as good as an archive, which unfortunately is still absent. You can select how many messages are displayed in your preferences. 2. Even better, there's now a search function (I guess eGroups had something too, but it didn't seem to work very well if I recall). Type in a search term (e.g., Vineland, MkIV, SQ, 549 :-), and up pops a message list with all messages containing the term... Michael ----------------------------------------------------------------- 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 | ----------------------------------------------------------------- |
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Re: Big Tek parts Index is on line now
Stan or Patricia Griffiths
If you haven't seen it, we have a large cross reference (about 2000
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entries) of Tek transistors on our web site at <> Click on the Tek reference area and look around. You will find lots of interesting stuff there. Stan w7ni@... Michael Dunn wrote: At 5:03 PM +0000 2001/1/25, walter shawlee wrote:We finally organized and posted all our Tek semiconductors,Thanks Walter. Next time I'm in "Tek mode", I'll see if I can't |
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