Wow. That intro, fantastic.

Sweet. So needed now to show this to young people. So they will know what basic laboratory instruments are for. I so sad, that these materials are no longer on popular media. When I started with DIY Moog synthesizer modules - oscilloscope provided great help with starting and initial setup of that modules. This was digital one, but with proper fluorescent tube display. Perfect tool for it. Specially for oscillators, filters, LFO and slew limiters. I could watch how they work and how good this work is.

"Even Hoby workbenches" 🤣

Nice hair. Wish I had it.

I'm planning to create an EE club for my highschool, and this video will definitely be on my list of things to show in that club! I have a couple 2200 series scopes as shown in that video so even better! Thanks for providing this film!

This is great! I love these sorts of informational videos from the past!

Oscillowhat?

I got that exact model Oscilloscope right after High School. I was SOOOOO PROUD!!!!!! 🤩

...and yet Tek never made any inroads into PC graphics cards. They saw it coming and couldn't do it. Neither could any of the other "workstation" level graphics companies, not even SGI.

Riddim

Hard to believe this entire field was made obsolete almost overnight by LCD.

Isn't it nice when all the semi's are socketed, well unless the sockets are corroded.

You see how the vacuum in the crt just sucks the glass in when the tube breaks

Great oscilloscopes! I restored a 545A.

The old style wet tantalum capacitors usually have a sulphuric acid electrolyte, make sure to neutralise any leakage with a water and baking soda paste.

Great stuff here!

I think it is about the volume of manufacture. There is still something like this happening and I am glad being part of it. I am talking of dilution cryostats. Welding, brazing, sintering, electroplating. Done in-house in small batches. There must be other products too, but only small scale. The pressure gauges we use say "made in Lichtenstein" 😅

I fixed a couple of PS501's and found one had an open circuit main filter cap and the other had a dead (open) current limit LED. As the LED itself is part of the feedback path, this caused it to have no current limit at all and I ended up killing the pass transistor in the mainframe.(replaced the LED's with brighter 1980's ones) I also have problems with intermittent operation of the output PBT switches on both units & with similar switches on the DM501's I have.

Concise analysis of the failure, its potential causes, and possible remediations. Very well done.

Is there a suitable (modern) replacement for the 741 that has a higher maximum supply voltage? OPA551 maybe? It strikes me that the choice of OpAmps may have been more limited back when these modules were designed and the 741 was chosen. I sometimes wonder if the choosing of the 741 is willful or just "that'll do".

Great info! Tnx for your efforts!!

We had two of these at U of P when I was there.

I don't know about Bldg 13, but I do know Bldg 50 had significant asbestos issues even into the 90s. If work above the drop ceiling was happening, everyone had to go home. That would explain the mask precautions.

I worked on such a machine as an intern in 1979. The system was complemented by a file manager (8 inch floppy drive) and a plotter, all connected via GPIB. The performance and of course the graphics capabilities were amazing. I still have some listings and plots from these days.

Can you play 'Artillery' on it?... KABLOOIE!

Fantastisc, Very satisfying to watch

Wow! I think the 611 was the series of storage tubes used in the 4051 and 4052! I loved my 4051 in my first job after university - it was my first personal computer experience! When I tried to find one in 2000 - I found a 4052, then found a 19-inch 4054. I love both of them and am still creating new BASIC programs for them!

You might be interested in this RU-vid video. It is part 1 of a very detailed restoration of a 576 curve tracer. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-pQRmlUGJsZA.html

Hi Bob, Just finished looking at the video of the 5-volt supply. My 468 had failed about a month ago and I finally got around to check it out the other day. The problem was exactly the same. The Shotkey diode was shorted. Luckily the crowbar transistor was still okay. I replaced the diode and the capacitor next to the diode because it was leaky. Now the 468 is up and running again. Good video on replacing the diode and troubleshooting the problem. Don

Awesome film, it made me want to recreate the campus in both cities Skyline, and minecraft so that it will never be lost to time

I have a problem with the 4x attenuator on one channel. Not sure if it is the attenuator or the board at that location. I should swap the 4x on each channel and see if the problem moves. Then I will know if it is the board or the attenuator.

lovely vintage porn .............. could watch this all day ........none of us could afford these back in the day, but i did repair a 7603 with 7b53a . and 27a18

👌👍

Suggestion for cap alignment??? Maybe make a jig from a piece of very thin cardboard... Place the thin board on top of the freed PCB and mark the pin hole placements. Cut slots (a single cut with the scissors, with no extra width) from the side of the board inward to reach the pin holes. Slide the jig onto the cap pins. Drop the PCB onto the cap pins. Solder in place. Remove the jig, by sliding it off of the cap pins. I hope that was clear and that it helps someone..

If those caps are not specially selected why not make the job much easier by just replacing them, rather than dealing with the short leads?

I might have thrown a little bit of RTV748 electrical grade silicone to hold the capacitor in place. Those leads are a bit long and vibration could be an issue.

Have to agree that when assembled those cap leads were full length and easy to "thread" into the board and then trimmed once soldered. Good tip about 2x the farard value for replacing tantalum with electrolytic.

It would be nice to also mention that the power supply diodes and filter caps are a bit undersized and they tend to fail pretty often. Also isn't one of the capacitors charged with making a thru-hole connection and must be soldered on both sides? Also its ground lugs are tasked with carrying ground currents between the ground lugs. Kinda iffy, fellas.

I l❤ve crt 😍

Wish someone could remaster these (or whatever its called) videos into 4k. I remember watching high school films like this growing up in the 70s

grade A top shelf retrotek FROM long ago like God intended

I have to believe this transition to digital storage was a game changer in diagnostic and testing. I also miss the voices of the narrators of old videos!

This is a great idea. I am going to build a jig and use this with my 577. The wide voltage and current range on the 577 means that I can test most capacitors I will ever encounter. Thanks!

Freight Train!

Next, tie a cable to the transistors emitter and base leads, and then hook it to your trucks trailer hitch. Once completed, hit the gas pedal.

Thanks

Cool video! I’m fascinated by Tektronicx and recently purchased a TM 503, a TM504 and several modules. Mostly DM’s and PS’s for now. Will complete the TM series cabinets with a TM501 and TM506 and then add as many modules as I can find for a reasonable price. I want an analog Tektronicx oscilloscope and will probably go with a 2200 series unit. I’ll want to get a couple similar enough to use for parts enough to keep one unit functional.

The spiral resistance shown being deposited inside the large part of the glass envelope, was known as a GPA, or Gradient Potential Anode. It was connected to the final anode at the phosphor end, and the other end connected to next anode at the thinner end; which was connected via a well spaced pin on the tube base pins, so as to form a voltage gradient between them, giving a steady increasing voltage between the last two anodes, to give a gradual increase of accelerating voltage to the electrons towards the phosphor screen, to improve focus and acceleration of the electron beam while traveling in the wide part of the tube.

So is the plan to get an e tracer and purchase hundreds of tubes to find one sufficiently matched

Amazing to have this pop up. Nothing I've been looking at is anywhere close to suggesting this. I used to work in the building that fired these. There were two very long kilns and I placed the greenware on the moving belt and removed the fired product. There were additional duties as well and this was in the later 60's. I still have one rectangular crt.