Tag: オシロスコープ

  • New Oddball Arrivals!

    We love to re-use, upcycle, recycle, restore, re-invigorate!

    We scour the planet, rescuing unique-looking cathode-ray tube based devices from certain destruction. We have oodles of oscilloscopes, spectrum analyzers, capacitor testers, audio monitors, medical instruments, television broadcast equipment, engine analyzers, and so much more!

    Check out these newly arrived devices, just waiting to become Oscilloclocks:

    Fukuda CS-1A Cardio-Scope

    A bed-side heart rate monitor, used in hospitals of yester-yore.

    By default fitted with a long-persistence 5″ CRT and amber filter.

    A colourful addition to any bedroom!

    HP 8414A Polar Display

    This early 1970’s Hewlett Packard green-screened device will take your living room straight back to the Space Age! The display is rack-mounted by default, serving up a full NASA look-and-feel.

    And removed from the rack, the 8414A is as cute as a button! It’s the perfect size for your desk, coffee table, or display case.

    And for the truly serious NASA enthusiast, we might rack-mount the display next to a blue-phosphor HP 8412A Phase-Magnitude display. A dual-display visual virtuoso!

    Cleaning, restoration, and modifications

    These devices are original and deliciously dirty! We’ll do our best to clean, polish, wax, and otherwise restore every surface as much as practical.

    If you really want, we’ll re-paint, re-plate, re-finish, or re-anything – to get you the right look & feel.

    We can modify with cast acrylic side panels, custom-turned wooden knobs, or brass bezels. We can do anything, in theory. Warning: diamond-studded escutcheons do tend to be rather expensive.

    Minimal invasion vs. Full conversion

    Our default recommendation is to bypass all the existing circuitry with a full set of Oscilloclock boards that drive the CRT directly. This ‘full conversion’ approach gives best performance, maximum reliability, and allows us to offer a full 3-year warranty on all components (except the CRT).

    But some devices are, miraculously, in partial or even full working condition when discovered! If the device can be electrically restored, we can apply a ‘minimal invasion, maximum re-use’ policy – keeping the existing circuitry alive, and installing only what’s needed to control the display. While reliability and performance suffer, this allows us to keep the original controls mostly functional, for the ultimate in twiddling pleasure!

    Stripping and weight reduction

    Many vintage devices are heavy! For owners who are less fastidious about maintaining internal originality, we can strip out unnecessary components and circuitry to lighten up the final product significantly.

    Some owners take this option, but additionally request that we retain every wire, board, and screw in a separate box for them to admire. We applaud their fascination in their device’s history and its engineering culture!


    If you like the look of these new-found beauties, let us know. If you don’t, let us know. If you have your own beloved device to convert, let us know.

    Heck, just let us know!

  • Mass Production – in Threes

    For Christmas, @oscillokid gave your humble senior Oscilloclock engineer a book: Why do Buses Come in Threes? It’s a playful tome, with surprising facts about how mathematics plays a part in nature and society.

    From three-leaf rules in plants, to the musical triad, to triple bird call repetitions, to The Three Body Problem — this magic number is everywhere.

    And it’s no coincidence that Oscilloclocks also Come in Threes!

    Do Oscilloclocks really come in Threes?

    Yes! But to be more precise, it’s the Oscilloclock printed circuit boards that come three at a time. Here you can see three boards being assembled:

    The Oscilloclock lab — where life happens in triplicate!
    These three Power Boards still have a longgggg way to go…

    Why in Threes?

    Well, every component of your Oscilloclock is manually picked from a bin, manually placed on the board, and manually hand-soldered.

    In a standard Oscilloclock model such as the Model 1 or the Exo, there are more than 300 individual parts!

    Picking, placing, and soldering just one board is onerous. Two boards? Tedious! And in such finite physical space, four boards is futile. Three wins!

    Wait – do you even procure in Threes?

    Each bin contains multiples of 3 + a bit extra

    Yes. We order parts from reliable distributors in very small quantities. The magic formula is a small multiple of 3, plus an extra one or two to fit minimum quantity restrictions and to cover parts attrition. The duly received parts are then manually unpacked and manually placed into the bins.

    By the way, parts attrition is the phenomenon where parts are wasted: misplaced, incorrectly mounted, or broken during assembly. At the Oscilloclock lab, we are proud to have an average attrition rate of less than 2%!

    Why procure parts in such tiny quantities?

    Ordering in large quantities is cheaper.

    But — we want the latest and greatest for our Oscilloclock owners! Even for the exact same component type and the same manufacturer, fresh lots may perform better and/or last longer than older lots, thanks to advances in design or manufacturing processes.

    Additionally, Oscilloclock circuit designs are constantly evolving. We prefer to adapt to newer component types regularly (with a few exceptions).

    Having a huge backlog of old stock would encourage us to stagnate. No way!

    Why not “mass produce”?

      Simple. Our motto is ‘Hand Crafted Scope Clocks’! This means an artisan design and assembly process, right down to the soldering.

      This fits with the Made In Japan mantra and the country’s ものづくり (monozukuri) culture. In an era where board factories are exclusively located overseas, embracing hand assembly helps keeps things local.

      Lastly, factory procurement and assembly is more costly in Threes. And we don’t want to increase quantities, as we constantly evolve the designs.

      But isn’t hand assembly a lot of effort?

      Yes, it is. Procuring the parts and assembling the boards takes hours. But it’s worth it to our Oscilloclock engineers!

      • The sheer joy of hand-crafting something for someone else.
      • The control over aesthetics such as precise component placement.
      • A dopamine rush as anticipation grows to the climax of final testing!

      We DO use factory assembly sometimes…

      That said, we aren’t silly! We DO use factory assembly for bespoke work where miniaturization or performance demands outweigh the joys and aesthetics of hand assembly.

      For example, the heavily specialized Oscilloclock Core Duo System below is designed to drive dual-gun cathode-ray tubes in a very small form factor. At this level of miniaturization, factory assembly is a given.

      The Oscilloclock Core Duo System! 90% factory-assembled

      What else is “Hand-Crafted”?

      Acrylic. We use cast acrylic (not extruded). The raw material is manufactured in Japan, and then machined locally, by hand, and to order.

      You guessed it – we order custom acrylic parts In Threes!

      Fan mounts. We’ve shown this before, but we can’t help but show it again!

      Cables and Harnesses. Hand- everything! See our earlier write-up.

      The Printed circuit boards themselves? No! Sorry to disappoint you, poor reader, but the last time we etched PCBs was for the Prototype. With all the messy chemicals and finicky alignment required for double-sided boards, we draw the line here!


      They say, “Good luck comes in threes”. We think so. And our patrons must think so, for several of them have commissioned three (or more) devices!

      Do you want to explore possibilities? Reach out with an idea. Or three!

    1. Slow motion

      Nestled amongst the standard features that come with all Oscilloclocks is a special effect called “Slow motion”. We suspect very few owners have noticed this feature, and fewer yet have actually tried it! It hasn’t been very well advertised… Until now!

      This Exo really likes the slow life!

      No, this video is NOT just being played back slowly.

      It’s the graphics rendering itself that

      has

      been

      slowed

      down…

      Welcome to the Slow motion feature!

      What is it doing?

      As described in Circle Graphics, every image and character shown on your Oscilloclock is constructed from segments. Each segment is actually an ellipse, arc or a line.

      Normally, an image (or text) is displayed on the screen by drawing its segments very quickly, all within the time of one frame. Each frame is completely redrawn 50 times per second. By repeating the drawing so rapidly, and adding in some persistence effects of the CRT phosphor, the human eye can’t see individual segments being drawn.

      But when “slow motion” is enabled, only one segment is displayed per frame. For an image or text with 50 segments (at 50 frames per second), it would take 1 second to draw the entire image. At this rate, the eye can easily distinguish each segment as it is rendered!

      Even the original Prototype from 2009 boasts this glorious feature!

      Enabling slow motion

      It’s in the menu!

      Menu → Effects → Slow mo delay

      A delay value other than 0 turns on the effect. This number indicates the number of frames that each segment will be displayed, before moving on to the next segment. Increasing the number therefore makes for a “slower” rendering of the image.

      In the above videos, the delay was set to 1. Here’s what it looks like when set to 10!

      Hybrid fast & slow motion!

      In the videos so far, you’ve seen the slow motion effect applied only when rendering characters – numbers and text.

      This is by design! Most graphics, figures, and images are intentionally left unaffected, so we can enjoy hybrid screens, like the below two examples!

      Hybrid slow motion – graphics are fast; numbers and text are slow!

      Phosphors and persistence

      At this point in the article, dear Oscilloclock owner, you must have tried out the feature on your own device – and you probably noticed a key difference in behaviour…

      No doubt you could observe the individual segments being drawn, but they disappeared so rapidly that you couldn’t catch the entire image!

      Slow motion on the cute litle Toshiba ST-1612B

      What’s going on? Were all those cool videos above doctored in some way?

      Absolutely not!

      This P1 phosphor isn’t very persistent…

      The difference is the phosphor in your CRT. Most Oscilloclocks to date have shipped with a green P1 or P2, blue P11, or amber P12 phosphor CRT. These are all beautiful phosphors, but they are relatively “fast”. They emit light quickly and brightly when struck by the electron beam, but they have very little persistence; the light fades relatively quickly.

      Enter the P7 phosphor! This incredible chemical first fluorescences (lights up) in a pale violet/blue colour, and then phosphoresces (persists) for some time in a yellow colour!

      Check out our other posts on the P7 phosphor! The trailing effect and Brimar Beauties for Plug & Play are a great start.


      Are you into slow food? Enjoy the slow life? Want to slow down even more? This feature is for you. Sit back, relax and watch electrons traveling at the speed of light actually form characters on your Oscilloclock!

    2. Oscilloclock’s Time Out

      Hi! I’m Oscilloclock Exo serial 20009-01, born 30 August 2025. Over the past few months, I’ve been cast, machined, etched, soldered, sprayed, assembled, crimped, wired, and every other verb you can imagine.

      When I was first turned on in the lab, you can’t imagine my joy – I felt ALIVE again!! After decades of darkness, my filament fired and my phosphors flared. I was reborn.

      But – I was tired.

      My builder took several months to hand-craft me. It’s a bit exhausting really, seeing all your components strewn out along the workbench. Knowing that you’re months, then weeks, and then just days away from achieving nirvana.

      So – my builder took me on a holiday! We went to Switzerland. He showed me to a few people. It was great to be fussed over! We took lots of photos in rooms, against scenic backdrops, and even in a bathtub (empty of course).

      I had a great break, and now I’m back in the lab. I’m being given a few more tweaks and then I’ll be moving into a new house. I don’t know what it’s like there, but I heard my owner can’t wait to see me.

      Boy, I love all this traveling.

      My builder said it’s fun to share photos with others. So I’m going to leave these here. I hope you enjoy them!

      Apparently it was hard to get the lighting “just right”! But I brightened up and tried my best.


      Oh, I almost forgot to mention: my builder said that although he’s super busy, you can reach out to him if you want. Apparently, I have many brothers and sisters awaiting the chance that I got! But he hand-crafts us only after securing a loving new home. He looks after us like that.

      Exo 20009-01 out.

    3. Very Good At VGA

      Recently, [Justin] asked: Can his beautiful Tektronix 606 XY monitor be made to work as a computer display?

      And even more recently, [TJ] explained he has a plethora of Tektronix devices, and asked how he might put them to use…

      So lovely… but what can you DO with it?

      Well, “putting to use” is precisely what we do here at Oscilloclock! And one option, indeed, is to hook the target device up to a modern-day PC and use it as a computer monitor.

      Time for an update on the Oscilloclock VGA Core and its variants!

      Shades of Grey Green

      Avid readers may recall these previous posts about making SVGA and XVGA displays from vintage oscilloscope CRTs:

      VGA display… On a 3″ scope tube!
      The VGA Cube!
      New Year’s Resolution!

      Truly dedicated readers may even recall that the solutions presented drive the CRT directly, completely bypassing any internal circuitry of the host device. And, that there were limitations in the current design; the most serious being binary blanking, where the beam is switched either on or off. There were no shades of grey.

      This Running Man needs no shades!

      Inspired by [Justin], we experimented connecting the Oscilloclock VGA Bare (a barebones VGA interface board) to our lab’s Tektronix 620 XY monitor. This bad boy has an analog Z axis (intensity) input, meaning that we can theoretically have shades of grey… er, green.

      And the result? A pretty decent PC display!

      A recent post, as displayed on the Tektronix 620. (Yes – I know it’s upside down)
      Here’s what it looked like on the laptop’s display

      Doomy Demo

      Ever wanted to play classic Doom on an old green screen? Here we go!

      This Tek 620 is no longer doomed – it’s been Doomed!

      Yes – the display is horizontally inverted. The VGA Bare currently does not support flipping the X and Y signals.

      This unintended challenge makes playing Doom exceptionally difficult!

      Matrix Masterpiece

      Who could resist displaying digital rain (Matrix code) on an old Tek display?

      Matrix code, as generated by tmatrix. Note it’s horizontally inverted

      While working on this demo, I learned more about Matrix code – and that it includes Japanese characters scanned from the creator’s wife’s cookbook. Wow, I thought those raindrops looked awfully familiar!

      The Setup

      Not a bad result! And the hardware setup was simple.

      • PC
      • HDMI to VGA adapter cable
      • Oscilloclock VGA Bare
      • BNC cables and connectors
      • A few resistors
      • Power pack

      As always, nothing is perfect! A few tricks were needed to make the experiment a success:

      1. The VGA Bare circuit needed a few minor improvements, to better support official SVGA and XVGA timing standards
      2. A crude level adjuster (resistive divider network) was needed between the analog intensity output and the Tek’s Z axis input
      3. The PC display resolution needed to be set to SVGA (800 x 600) or XVGA (1024 x 768), to give maximum clarity
      4. A high-contrast theme was selected, to greatly improve display contrast

      What’s next?

      With the successful close of this proof-of-concept, [Justin] and [TJ] now have another clear option to make use of their vintage test equipment: a VGA Bare ready to mount inside their device, or a beautifully encased VGA Connect (à la Oscilloclock Connect).

      But to make this truly production-worthy, a few improvements are needed:

      1. Output voltage level adjustments, fully independent for X, Y, Z
      2. A higher-voltage Z amplifier
      3. Independently invertable X and Y signals
      4. Reduction in the ‘ghosting’ or ‘ringing’ effects currently observed
      5. Improved contrast and avoidance of ‘washout’ seen between pixels
      6. Digital HDMI input !

      … all added to Oscilloclock’s ever-growing backlog of things to do!


      Do you want to play your favourite classic game on your old XY monitor? Do you want to stack 10 oscilloscopes on your shelf and have them all showing Matrix code? Or put your Grandpa’s old scope on your desk at work and have it display your Outlook calendar?

      Our mantra makes it possible: Just. Because. We. Can.