I remember in the very early 70s, a TV repairman came out to our house who had a tiny "wiggly line machine" (would have only been a single channel analogue back then).... I was doomed to get into electronics from that point.... I wanted my own "wiggly line machine".... and this tiny one is GORGEOUS!

@Allan_aka_RocKITEman

Жыл бұрын

_"wiggly line machine"_ is now my new nickname for oscilloscope...😉

@braixeninfection6312

4 ай бұрын

I love this! I have now printed out some labels to attach to my "Wiggy Line Machine". It is now properly identified lol

Looks great Marc! Thanks for the mention too, my NiMH battery still works fantastic today. We must have connected thoughts, I mentioned you in my latest video as well. Thanks for sharing your video's with us!

@canalcomentario

2 жыл бұрын

I like your job.

@Mark_C1

2 жыл бұрын

Love this, have watched both of you repair this unit and enjoyed both, thank you for sharing

Beautiful little scope, awesome repair. Nice battery solution. And about the knob: The simple fact you even tried to mould a new one makes me give you an A+ 👌Always so interesting and worthwhile watching your videos Marc!

The two-tone nature of the new button actually provides a certain character to the instrument. What an awesome scope!

Yay! Another 222 back at work. I have the 222PS, adapted for measuring higher voltages. The independently isolated inputs and battery power make this hard to beat for line level work. It's a shame that it's an early digital scope though, we really hated the digital scope at work in the early 90's. I would've preferred analog.

For your next moulding attempt you can pigment many of the resins. I've never really liked paint for touch surfaces. I'd cast up some test samples by pouring, adding pigment, pour the next all out of the one mix to get close. Then try some knobs.

@gabotron94

2 жыл бұрын

And get help from any friend you have who paints! I tried a whole afternoon to match a color to an existing one, I asked my artist neighbor -- she got it right in about 5 minutes

@rkan2

2 жыл бұрын

I'd vote for SLA printing the whole thing. Can't you choose colors for them resins too?

I was a Mainframe computer tech in the Air Force during 70's to the early 80's and used most every piece of HP gear you have. Huge Fan as HP was super solid. Fluke made really good test equipment back then. We would almost always opt for Tektronix when it came to Scope's, certainly before digital scopes came out, I bought a 453 for my analog bench same type I used every day in the Air Force, its way faster to set up and use than my digital for low freq audio signals.

An episode where DIY and craftsmanship are featured! It's a shame that so many surplussed pieces of fine test equipment have missing or broken knobs. They stick out and get damaged easily. First time I've seen a how-to on duplicating a knob. Thanks, Marc.

Great work. I especially liked the part where the calibration repaired itself. If I had to guess I would say it was probably monitoring the displayed position of the lines and did not like what it found until you calibrated the xy position of the display. And the liquid plastic is obviously great stuff! I've only ever seen it used before, but never had any hands on with it. You say this was your first time with it and your results look great! I may try that in the future myself now. Alot easier than breaking out the CAD software and a 3D printer. Great stuff! Thank you, Marc.

1992 I was working for a small business that did service calls on industrial VFD motor drives. We had a very similar Tek "power scout" scope that was yellow. Remember perching this scope inside a 200 horse power (150kW) Emerson drive cabinet at a auto plant. The drives were tall cabinets on the wall and the motors were the size of a desk a couple meters away. We had the interlock on the door bypassed so we could power it up with open door to monitor things. When the drive attempted to power up, there was a huge current surge in the 3 phase cables near the scope and I remember how the CRT display would twist/oscillate in a rotational way CW and CCW with a nice damped response!!! Lots of magnetic fields in there!!!

What a handy little scope! I used to carry a little US Navy scope from WWII to look at audio waveforms to check for distortion. Measured the levels with my HP 400D ACVM.

Brilliant. I love how you moulded the knob and then used a lathe to fully repair it.

I like the slightly chillout music style you went for here

This was great! THANK YOU for posting the Serial docs, I've looked for them a few times will no luck; Maybe this will inspire me to finally troubleshoot the electrostatic deflection issue on my little 222. I picked mine up on eBay a few years ago after seeing Mr. Carlson's 224 video LOL!

I loved the way you molded the knob, I'd have been looking for a 3D printed one but your method is a more pleasing result I think.

Nice one Marc :D, the 222 is a cute scope indeed, even if it isn't that useful nowadays. The actual sampling rate is only 1MS/s for single shots, it does 10MS/s on repetitive waveforms by equivalent time sampling. I modified mine to work with normal scope probes, I can send details of the mod if you're interested. I'm definitely getting the Li-Ion adaptor now. Mine had 4 D size Cyclon cells in it which are now completely dead.

@CuriousMarc

2 жыл бұрын

Thanks, I did not know the wrinkle with the 1MS/s sample rate, that explains why it aliases so badly.

Love it....can’t get one so I make one. Nothing phases Marc! 👍

Back in the day. Late 1980's to mid 1990's, I talked my boss into getting one of those so I could use it to troubleshoot cars (Porsche, BMW and Mercedes). The early days of Bosch electronic fuel injection. I was able to diagnose some very tricky problems with it. Before that I used it in my job as an industrial electrician / electronics tech. Loved it. I was once testing 600VAC for proper 3 phase power coming out of a bank of SCRs and the set screw on the knob was hot and I got a shock every time I tried to adjust it.

I have the 222PS Power Scout in yellow that I got at a flea market for $10. I LOVE it! I'm surprised we weren't able to hear those relays clicking for the calibration. Mine is quite loud. My only complaint is indeed the special probe plugs so no special probes without adapters. Just hook up your source or sources, press Auto, *clickity-clickity-clickity* and BOOM!

Maybe a B- for colour, but definitely A for effort. ;-)

I can check at the Tektronix company store the next time I go and see if they have any knobs. That and a friend has a surplus store with a lot of Tek knobs and I can check his place too.

It's amazing how gratifying projects like this are. A small battery powered scope on the desktop can be super handy; especially when you don't want to risk toasting an expensive scope. Very enjoyable video. Thank you. It is appreciated.

I had used Tektronix 222 30(?) years ago as a pocket miracle. Thans for saving the little boy.

lovely, I had a 324. those little scopes are fun. I still have a 336 which is a bit bigger but still pretty small for a CRT.

Very nice restoration! Love this "old" technology, from my early days in engineering. Tek equipment was always fun to use.

love the work on making the new button, the colour can be fixed later !

i'm in love with this relaxing music

How charming. Can never have too much lab equipment.

Okay, I've made the button. Now, how do I make the rest of the scope?

And thanks for scanning the manuals!

Nice! I snagged one almost New in the box a few months back. It’s great for dragging around the house and shop to do quick checks. I haven’t splurged for the 18650 NiMH battery pack retrofit to restore its full portability though.

There used to be a Tekscopes Yahoo group, I don't know where they migrated too after Yahoo shut down their groups service. But many years ago I was able to get some Tek knobs from a very generous member on there.

Wonderful as usual! Lovely button molding =D

I remember the field service team at my employers getting one in 1989, it was a great little scope.

It's so teeny weeny and cute as a little kitten! Low voltage operation is cool as well.

Tek for scopes. HP for most anything else. {^_-}

@CuriousMarc

2 жыл бұрын

My motto exactly!

What a great little scope! I still prefer CRT scopes to the modern (and more capable) LCD variety.

@theremyyoutube5431

2 жыл бұрын

How did you see it 1 day ago? x)

@whiskeytuesday

2 жыл бұрын

@@theremyyoutube5431 Patreon maybe? I have notifications turned off on patreon and always forget to check myself but it's possible this premiered there early.

@CuriousMarc

2 жыл бұрын

Yes it was on Patreon for a few days because it was held up by a bogus copyright claim from a copyright troll. We got rid of the troll.

Nice work, Marc!

I always love these tek scopes!

That really is an awesome lil scope. Very cool episode.

Nice work Marc

I remember when these first hit the market. What a marvel, very expensive marvel they were! I guess that makes me "vintage" too. LOL, eery when stuff you lusted over in your youth becomes a vintage collectible.

Use to have one of these at an R&D lab I worked at in the mid-80's. Never occurred to me that in the future it would become a collectible.

Perfect work

I learned embedded on 68hc11f1 ! It’s still my favorite of all I’ve used. I still have the dos assembler and hex tools.

Wonderful work :) i have the same silicone. Will try casting it. I am experiencing the same thing with the vacuum pump. What helps is three cycles with rapid release when it bubbles up

Many thanks for this beauty ! All the best from Croatia.

this should be fun... i purchased one of these for our shop and it still works.. 😍 thank you 🍩☕

Wow, fantastic work, i have a Tektronix 2232 and i need make a restauration, i like this Osciloscope.

Great video, great content, liked the battery replacement, nice project to tackle and addapt for other applications? And the lo-fi soundtrack with the thumpy bass was nice too.

I wonder if the 'belt buckle' is a property tag for Delta Airlines. I could easily see this being part of an aircraft maintenance crew's tool kit.

@MLX1401

2 жыл бұрын

Watching the video I kept thinking how the tag looks just like the "seat number" ones you see attached to the airplane seats 😄

@neillthornton1149

2 жыл бұрын

That's what I was wondering... it even has DL on it which is their booking company code.

@CuriousMarc

2 жыл бұрын

It’s written Delta Airlines in big on it, guess who owned it beforehand…

@rednecktech9485

2 жыл бұрын

@@CuriousMarc Spirit? They probably bought it used from delta :)

@MinksMotorsandMore

3 ай бұрын

I work at Delta as a mechanic now, I recognized that metal "beltbuckle" almost immediately. It's the older style of the tool room's inventory control tags. These are from back before barcodes made inventory control so much easier and these are just chunks of aluminum with stamped letters and numbers on them and will last as long as the scope will I'd say. @@CuriousMarc

Great job Marc! BTW, loved the lab tour this week with Daniel at Keysight! 73 - Dino KLØS

Oh, new music, that's cool. As always, as nerd as possible, thanx.

Great work! You might want to look at Tamiya modeling paints for the knob. They have many flavours of gray.

Not sure about B- ! This is A+. Awesome little scope!

Those modular multifunction knobs are a neat piece of engineering. I wonder if it would be possible to get something like that off the shelf as a maker part.

@HA7DN

2 жыл бұрын

The part I'd really love to have today is the good-old rotary ('Yaxley') swtiches. They are basicly what those knobs were. Next on my list is the soviet-style isostat switches, and only after that comes CRTs...

@CuriousMarc

2 жыл бұрын

Tek is the king of miniature multifunction and otherwise creative switchery. Which of course breaks with rough handling at the recyclers. If you restore Tek equipment you'll spend a lot of time on broken miniature switches!

@jogginnoggins9918

2 жыл бұрын

@@HA7DN Can you provide a link to a picture of those soviet isostats you spoke of? I have a bunch of old soviet telephone/mainframe stuff, and Id like to compare.

@HA7DN

2 жыл бұрын

@@jogginnoggins9918 just googled 'isostat switch' and mostly good hits came up. AFAIK these were modular switches, they could be tiled next to each other, came in various configurations (SPST, DPDT, even more), and could be linked to form radio groups or just be on/off switches.

Simply nice!

I really enjoyed the video

Excellent Marc - lovely little scopes. i still use my Hameg CRT scope more than my modern scopes - there's something more comforting using them. I see that there was no mention of the 222 in your recent Keysight appearance 😄

So funny, it's much smaller and presumably much newer, but it looks almost the same on the control panel as my (currently not working, but it worked a few years ago) Tek 2215A analog scope. Clearly they had a strong internal design guide, or a very opinionated interface designer... Really cool to see you make the replacement dial, that was some really fast silicone and resin!

The French-made Metrix hybrid scopes of the early-to-mid 1990s are very nice to work with- but of course are considerably larger than the Tek 222/224. Mine is a 20MHz version which was given to me by a friend. It's a combination analog scope and an 8-bit 40MS/s digital scope, and I believe it is based on a Philips reference design. I do have a LeCroy 150MHz digital scope from the same period but it is much bigger and heavier and not nearly as user-friendly, and having both analog and digital capability in one instrument is nice to have for certain applications.

Next time start with your darkest color first and workup to your lightest. An airbrush would give you much greater control over particulate size and the density of coverage but I doubt you want to run out and buy one to paint one little button so try this instead. Setup a little backstop behind your target, you can use a bit of cardboard or cover a corner in newspaper, and rather than trying in vain to control the spray density while aiming at your object, instead aim above and a bit behind it. You can even put you object on the end of a stick and simply move it in and out of the edge of the over spray. Maybe mold a few test pieces you’re not going to bother finishing to practice on.

Great job, enjoyed it very much. Yes that was (is) a very nice scope 73 Leo.

I have this one, it's a great field device !!!

Great video great scope....cheers.

the awesome things about devices like this is that _most_ of it can be brought to near-factory condition with some effort. Especially CROs. DSOs what with having firmware and custom digital ICs are a bit more difficult but they are generally very very good to work both _on_ and _with_

A video kinda like the old times, and it's nice! Easier to follow imho. From time to time, that's cool!

Love this little monster! So small with a CRT AND a happy with anything powersupply! @10:37 Your tone of voice reminded me of Richard Hammond from Jurassic Parkas he helped the little velociraptor out of their shell. Hopefully this little gremling won't grow too big and hunt us all down. Don't feed it after midnight!

Tres chic :) This will take the catwalks of Paris and Milan by storm I'm sure.

Love the repair videos! Nice. Thanks for letting us watch.

I even tried to play bad apple on it in x-y mode and it works quite well!

Nice little scope. I would have thought a 3D printer would have been the solution to the knob.

Excellent.

I love mine, SUPER handy, especially nice when you don't really need a full sized scope. I use mine when working on cars and such, but also on the bench... When I need it portable, I can run it off 2 18650's, just have to remember not to plug it into a wall adapter at the same time!

"Electron Beam." Yes please!

very very cool!

I always wanted one of these miniature oscilloscopes! RIP ebay...

Great Video, Marc! I thought I was already Subbed but not according to KZread so I may have spaced it. I am Subbed now.

Came for the electronics ... Stayed for the alchemy at the end.

Nice of your daughter to let you use her art supplies

Nice video Marc, I love the way you repair switches. :) Did you notice a tiny but of ripple on the traces displayed at the end sequence?

Amazing skills (and lab!). Lovely little scope, too! I wonder, where is that elevator in the hollowed-out volcano in which your laboratory complex is located, where you compose all that elevator music? I bet it's next to the underground hangar where you keep all that hallowed Apollo hardware...

Delta Airlines kit 😍

The different color is a feature. You can very easily visually identify it that way, when you are concentrating on the display.

Thanks for sharing. 😉👌🏻

Wonderful video as always Marc. One suggestion: POUR HIGHER. You want to make a thin stream, so any bubbles that still exist get popped by the surface tension of the stream getting thinner and shearing! Didn't see what you used to glue knob to cup, but hotglue works well. DO you know the Hotglue Alcohol Trick (HAT)? A single drop of alcohol on the edge of hotglue, push on the edge a tiny bit to put some strain on the hotglue, and it pops free instantly. Doesn't dissolve the glue, it just makes it lose adhesion, to ANY SURFACE. Works on glass, metal, wood, paper, cloth, PCB, plastic, wires, connectors, etc. Just put a drop on the edge of where glue and surface meet, and put some pressure, and it pops free. It might be mechanically connected (if it flows around a wire, it will not be attached to wire anymore, but still mechanically attached, like a donut spinning on a rod, so you do have to cut then, but it pops free cleanly other than that. Doesn't matter as much for low temp hot glue, but high temp hotglue holds 10x stronger, and tears instead of just peeling off if you try picking at it. HAT works on high-temp glues as well, just the same. Other non-polar solvents work. Ethyl alcohol, methanol, acetone, isopropyl alcohol, naptha, MEK (but it does dissolve the glue slowly iirc), all of these solvents work to pop the glue free without any mess. Life is much easier with this trick, especially fixing things. Most modern things you buy, have hotglue on them! From trying to keep connectors from backing off, wire routing, etc.

@clonkex

2 жыл бұрын

Interesting tip. I often work with hot glue - I'll have to give it a try!

Paint? I'd look into adding some kind of dye to the plastic so it's naturally the same color - and would never wear off.

It's both electronics and a craft project.

@15:08 - "Let it live as it is." Sir, we watch your material. You most certainly NOT let it live the way it is. You have access to some of the smartest minds and high-end equipment. No silly, cute (I want one) scope is going to best you, my friend. Not a chance.

I got the same failed self cal with the same errors when the power supply was not able to supply enough current, even though everything seemed to be working well. (I used some random wall wart supply). Replacing it to a better one cured the problem. So maybe during self cal there are some additional power requirements and things can get marginal.

show. i am Brazil and love videos

i have two of these and a spare . if i remember correctly both of my scopes failed calibration if you dont have the probe tips grounded

Yea, it is so cute. I WANT ONE. Oh digital. I want analog. There are advantages

Cool

for nimh drop out on start up i wonder if something along the lines of eneloop pros that are designed for camera flashes and the like might be more appropriate than the more standard rechargeable AA equivalent

Ultra nice video and kindly service, i hope you enjoy it a lot. I have a 224 with static and outrange screen, not responding at any button. Im searching the service docs, any help will be appreciated, regards from Venezuela.

Interesting

CRO's are like cats, if you start keeping the cute ones then they start to breed and before you know it.....

@Allan_aka_RocKITEman

Жыл бұрын

😆😆😆😆😆

Obviously I'm watching on a monitor, but check out RAL 180 40 05 aka BS 18B25 (merlin grey) as a colour match.