View allAll Photos Tagged oscilloscope
a7s + Wollensak Dumont CRO Oscillo Raptar 0.9X 3 inches f1.9 (reversed; Fairchild Oscilloscope Record Camera T-450A)
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HeathKit EC-1 From 1950 to 1965, electronic analogue vacuum-tube computers were used to design, test and run civilian and military equipment like aircraft, ships or rockets. The first systems were very expensive. However, components cost (especially vacuum tubes) was steadily decreasing.
In 1960, Heath Company launched the Heathkit EC-1, the first analogue computer (almost) anyone could afford. It was sold in kit or pre-assembled forms and was quickly and widely used in industry and universities.
Unlike our modern binary computers which accept only two values as entry (0 or 1), an analogue computer represents input and output data's in voltage levels. So, any positive or negative value could be read directly from the built-in meter. An external oscilloscope could be also used as a display device, as well as a grapher for printed results. There was no memory and the CPU wasn't a processor but 9 DC operational amplifiers. Discontinued in 1965 when the first affordable digital computers were introduced. Price $400.
a7s + Wollensak Dumont CRO Oscillo Raptar 0.9X 3 inches f1.9 (reversed; Fairchild Oscilloscope Record Camera T-450A)
I got tagged by queen! :)
The rule is I have to write 11 things about me.. It's the second time that I got tagged so I think I have to play it this time..
11 THINGS:
1. I prefer to be called Ruch instead of my real name because many people would misidentify me as a woman. I usually encounter it from people calling me on the phone without letting me to speak first. Later, they will tell me sorry for associating to my name the word 'Miss'.
2. In my work, I deal with things that cannot be seen directly (thanks to the inventor of oscilloscope) which is really ironic with my interest in photography, which deals with things that can be appreciated with the use of our visual sense.
3. I created a poem called the ASIC Engineer's Perspective of Love a year ago, a very corny (corny pa sa mais) poem that my teammates asked me to make. It is a 9 stanza poem, 4 lines per stanza that relates ASIC stuffs to love love (yeaaahhhh..). They asked me (again) to arrange it so they can sing it but I refused, reasoning that it cannot be played on radio.
4. I can make my ears move independently, up and down. I know that this is not unique to me but I am just happy I was able to learn it. I can sense that you are trying to make your ears move right now..hmmm...? :)
5. My favorite snack is noodle with egg and dip skyflakes crackers while the noodle soup is hot. The canteen crews know that..
6. I got addicted to guitars before getting addicted to photography. But I ain't rockstah. I prefer to play acoustic and classical music.
7. My all-time favorite album is Eric Clapton's Unplugged. I have a cassette tape of this album but never had a CD copy.
8. I prefer to stay home during weekends not until I became interested in photography. Now, if I cannot shoot during weekends, it will be a big conviction to myself that I will suffer the whole week 'coz I don't have something to edit and post during weekdays.
9. Before learning the basics of photography, I learned first how to use Photoshop using online resources. It was three months later that I started reading magazines, books and online resources that talks about photography.
10. I want to attend one of Steve McCurry's workshops and join him on one of his expeditions. His works amaze me, big time! A great photographer.
11. I am happy that "things about me" stuff was down to 11 from 16. Now, I only have to think ten (10) things instead of 16. ;)
Thanks and Enjoy Life!
TOPS
Brgy. Busay, Cebu
April 26, 2009
EXPLORE 04.26.09 #279
Thanks to all for the visit!
a7s + Wollensak Dumont CRO Oscillo Raptar 0.9X 3 inches f1.9 (reversed; Fairchild Oscilloscope Record Camera T-450A)
1968
It was the first Marantz receiver in 1968. A solid state construction fitted with a small oscilloscope tube for FM tuning and monitoring of audio signals. 1% Resistors Used - The best resistors available, they give supremely low noise. They are used throughout the receiver in all vital circuits. Massive Heat Sinks - These dissipate heat from the power transistor circuits, and that means longer years of use. My Eighteen makes a perfect sound after 55 years. More is not possible.
Wollensak made a series of lenses that were designed to photograph traces on the CRT screens of oscilloscopes. These lenses were fast, since the traces are dim, optimized for closeup work–from half to full life size–and with a strong negative field curvature in order to keep all parts of the convex oscilloscope screen in sharp focus. That makes these lenses pretty much useless for normal photography, but gives them very unique and strong bokeh characteristics.
(from: toby-marshall.com/galleries/bokeh-tales/wollensak-oscillo...)
The lens was probably used in a Fairchild Oscilloscope Record Camera Type 450A
(see: www.collection-appareils.fr/x/html/camera-4730-Fairchild_...)
photo made with: a7rii + Kerlee 35/1.2
I came across this ad in my October 1943 issue of FLYING magazine and it caught my eye. It's a non-contact, optical tachometer that uses no electricity and doesn't need to have a special reflective tape added to the machine being measured.
Even cooler, it turns out that you can actually FIND them! I got this one in perfect mint, possibly unused condition in its velvet lined box with instruction booklet and 3 discs. The discs included with it measure speed ranges from 1000-4000, 4000-16000 and 8000-32000 RPM. There are ways to make it measure above and below these limits without any additional accessories, and it can also measure frequency of vibration as well as RPM .... which I guess makes it also a sort of mechanical oscilloscope.
This weekend a B-17 is coming to town, I plan to use this to read the RPM of its propellers.
I’ve been meaning to try this for a long time, inspired by a comment my father made as a child, well before I had any interest in photography. This is an image of electric arcs jumping from a sunflower that has 30,000 volts of electricity flowing through it. Otherwise known as Kirlian Photography. Read on!
Kirlian photography has its origins as far back as 1889, but was popularized in the late 1970s when two Russian inventors, Semyon Kirlian and his wife Valentina, found a larger audience for their experiments photographing electrical coronal discharges originally published in 1958.
There have been a lot of claims in pseudoscience and parapsychology regarding Kirlian “auras” in the past decades, and I remember my father mentioning that this technique could create an aura from a leaf that would remain intact even after a portion of that leaf was cut. As an 11 year old boy, this was quite the spark for my imagination, and made me think that there is more to the world than meets the eye. It turns out, there is: residue and/or moisture from where the leaf was placed could still be reactive to the high voltage. If the glass plate where the leaf was placed was cleaned of these remnants the aura around the cut portion of the leaf would disappear. There was a scientific explanation for this, but I didn’t learn it until years later.
While some people feel that the stochastic electric ionization processes here are mystical and beyond the veil of our own existence, I remain a very skeptical person. As a skeptic, I’m thirsty for knowledge and am forever trying to answer questions for myself, not taking them at face value from others. One of the major factors that affects these Kirlian images is the inclusion of moisture. A fresh leaf or flower has a larger discharge than one with less moisture, and the energy from the electric discharge itself helps water molecules evaporate. I breathed moist breath on this flower before taking the picture and the discharged grew much more beautiful as a result.
This image is created using a special Kirlian aura generator (they call it a “camera” but it just creates the subject to photograph). Voltages can reach as high as 30,000 volts and frequencies up to 1kHz. Turning these knobs and dials is as fun as doing the same to an old vacuum-tube powered oscilloscope in my dad’s workshop, around the same time that I learned that this sort of imagery existed. An electrified probe is inserted into the base of the flower and a heavy plastic sheet is placed on top to press it against an electrified plate. A sheet of paper is placed between the flower and plate to avoid an instantaneous connection between cathode and anode.
Expect to see a handful of these from me through the year – I find them an interesting abstract realm of photography that is deeply woven into the physical mechanics of our universe. This one looks like an eye whose vision is comprised of a few dozen stars. Nothing mystical about it – just a fun way to use science to make art!
Other things you might be interested in:
2018 Macro Photography Workshop Schedule: www.donkom.ca/workshops/
2018 Ice Crystals Coin from the Royal Canadian Mint featuring my snowflakes: www.mint.ca/store/coins/coin-prod3040427
“The Snowflake” print, taking 2500 hours to create: skycrystals.ca/product/poster-proof/
Photo Geek Weekly, my new podcast: www.photogeekweekly.com/
Glass tubing equipped with electrodes is evacuated by a vacuum pump (3 inches of mercury), a high voltage from antique spark coil is applied (approximately 1700 volts), forming a low-energy plasma, and then the effect of a strong magnetic field from an electromagnet, modified from an iron-core transformer core carrying much direct current (about 6 amps), is observed in darkened room.
Constriction of the pale violet-colored low-energy plasma within the magnetic field was observed and photographed as part of a science project.
Plasma = fourth state of matter
Similar experiments were performed by Nikola Tesla (1856-1943) with alternating current in the late 1880s except using much higher voltages at extremely high frequencies.
The scope has an input channel not working. Signal generator just needs cleaned up and a dial part replaces. Hard to beat hp test gear of any vintage. The BK is ok but not Tektronix. I’ll be using my Tek scopes to fix it. Probably sell it.
a7s + Wollensak Dumont CRO Oscillo Raptar 0.9X 3 inches f1.9 (reversed; Fairchild Oscilloscope Record Camera T-450A)
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Currently listening to Frequency (The Phenomenon of Sound) by DoKashiteru, available on ccMixter.
Photo for We're Here! as we check out our current listening. The photo is of my laptop screen showing the Windows Media Player oscilloscope visualization. Reflections off the screen give additional effects.
Wollensak 75mm f1.9 Oscillo-Raptar 1:0.7X Oscilloscope camera lens adapted to A7iii with T ring adapter step down to m42.
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5D mark iii and Contax Zeiss Vario-Sonnar 35-70mm F3.4 lens.
The obligatory photo of my faithful Kenwood scope. You can compare the image rendering to my shots of the scope with my other lenses / cameras.
Classic late '70's stereo setup.
Advent speakers - oscilloscope - turntable - cassette deck - two reel to reel machines - receiver - big heavy (Koss?) headphones - Many albums, cassette and reel to reel tapes - Discwasher fluid (large and small bottles) - tv - milk crates as furniture - index card file with music lists - other odds and ends - some sort of home built and commercial control units under oscilloscope and unidentified homebuilt device all wired up below the tv ... - geiger counter [ Three mile island happened recently and this apartment is near Binghamton, NY ] This guy was (is) an electrical engineer, here, fresh out of college . [ large ]
kodachrome slide 1979
** update, from one of the makers: "One of those unidentified electronic objects was a circuit Carlos (knees in the photo) and I (Bill) devised to translate signals from his quadrophonic amp to drive the oscilloscope sitting atop everything in the picture. It displayed cool patterns that danced with the music. We built it on a SuperStrip board. . ."
This lens was used to photograph oscilloscope traces back in the old days before digital storage scopes were invented :) They used to be extremely cheap but like everything else that's weird, the price has gone up quite a bit. I love Wollensak lenses. Some of them produce some of the most beautiful bokehs.
Winter.
Playing with an old Elgeet 3 inch f/1.9 OSCILLO-NAVITAR lens. This oscilloscope lens came with what appears to be two back-to-back lenses with a shutter built in-between. I can unscrew each lens (they both appear to have about a 3-inch focal length), and it is one of these that I have taped to a camera mount. Since there is no focussing mechanism and no change of aperture, I use small extension tubes to change the point of focus. I'm looking for funky bokeh, and etc... I expect I'll be playing with this config a bit, we'll see!
Photo-Recording oscilloscope traces at the Bureau of Power and Light, Los Angeles, during October 1938.
Please go here to see more images of Photographers at Work
www.flickr.com/photos/69559277@N04/sets/72157629353901321...
Produced from the original negative in my collection.
Winter, a drizzly drop.
Mounted an Elgeet 3inch f/1.9 Oscilloscope lens (one of the two lenses in the assembly, probably from the '60s), backwards taped to a bellows mounted to my Nikon FF DSLR, to fiddle with bokeh and optical imperfections. There is but one aperture, wide open.
If there is a chance to play, then play.
Random Pre-Silicon Ingredients... so it's all analog without storage...
Tektronix Type 564B Storage Oscilloscope with Plug-In Type 365 Spectrum Analyzer and Type 3A9 Differential Amp
Tektronix 148-M Insertion Test Signal Analyzer
HP 191A TV Waveform Oscilloscope
Tektronix 520A NTSC Vectorscope
Blinking Red Light
So it's a piece of vintage electronics with a screen and a handful of vacuum tubes. No transistors or memory chips. So how does it "remember" the trace on the screen to show it persistently? From a bitmap perspective on the screen, there is a lot of data to be retained...
The answer is fascinating. Memory is implemented in the display screen itself with a separate tracing beam reading the phosphors and regenerating them with the write beam (Wikipedia details). It reminds me of early computer memory systems that stored data on the phosphor of a CRT…. (giving “Video RAM” a literal instantiation =)
Ranjit: so now that we know how an image can stay on screen, to make an Etch-a-Sketch, you dial the beam down to a point or small bar, and use the vertical and horizontal adjustment knobs to paint with light. It has all the limitations of the original toy (you can’t lift the “pen”) but it does have half-screen erase options…
This is an alpha-stage product, so the flicker on the screen is missing a couple letters. Today, flickr is in gamma, so it's just missing one letter.... ;-)
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Camellia, I believe, Tower Hill, Boylston, MA.
Mounted an Elgeet 3inch f/1.9 Oscilloscope lens (one of the two lenses in the assembly, probably from the '60s), backwards taped to a bellows mounted to my Nikon FF DSLR, to fiddle with bokeh and optical imperfections. There is but one aperture, wide open.
With the 10D and EF85mm F1.8 USM. Compare with the shot I took of the scope with the 5D mark iii a short while ago.
Oscilloscope camera built by Hewlett Packard around 1960 fixes to front of oscilloscope by way of clamp and produces a snapshot of readout via the polaroid back
Uses Polaroid land film types 42, 46L and 47
Dimensions : 13-1/2 inches long, 9-1/4 inches high, 10 inches wide
Weight : Net 9 lbs, shipping 18 lbs or 8.1KG!!!
Photographed here next to a 110 Hanimex to give an idea of the size
Begonia, Tower Hill, Boylston, MA.
Again using my funky lens, with my prior copy of what 'tis:
Mounted an Elgeet 3inch f/1.9 Oscilloscope lens (one of the two lenses in the assembly, probably from the '60s), backwards taped to a bellows mounted to my Nikon FF DSLR, to fiddle with bokeh and optical imperfections. There is but one aperture, wide open.
Energy, I hooked up my Oscilloscope to the left channel of my stereo, Flickr Friday theme energy. HFF
san francisco, california
1965
automatic test equipment
teradyne trade show booth, WESCON 65
part of an archival project, featuring the photographs of nick dewolf
© the Nick DeWolf Foundation
Image-use requests are welcome via flickrmail or nickdewolfphotoarchive [at] gmail [dot] com
For a bit a change I took this abstract of Weston Turville Reservoir last week. Thought it looked a bit like music seen on an oscilloscope.
Oscilloscope camera built by Hewlett Packard around 1960 fixes to front of oscilloscope by way of clamp and produces a snapshot of readout via the polaroid back
Uses Polaroid land film types 42, 46L and 47
Dimensions : 13-1/2 inches long, 9-1/4 inches high, 10 inches wide
Weight : Net 9 lbs, shipping 18 lbs or 8.1KG!!!
A chaotic transient and trap orbit in the double-well electronic oscillator.
The time series view is in the picture above. The circle on the left is the trapped orbit in one half of the double-well. The circuit takes an unpredictable time to trap, being chaotic (in the technical sense).
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My Electronics Workbench includes computer Analysis and Diagnostic capabilities, working alongside a collection of Vintage
1950's - 70's reconditioned testing and evaluation equipment. My so called obsolete equipment includes a (factory built) HeathKit
Model 0-12 oscilloscope which has been around for over fifty years, However this device has been modified and serves me well.
I also use a Tektronix 465 scope and a computer scope for comparative purposes.
My Hewlett Packard collection includes the 410B, 400D voltmeters, a 5512A electronic frequency counter and a 202C low
frequency oscillator.
I have several vacuum tube testers. My primary unit is a Sencore MU140, which has been painstakingly reconditioned.
The unit was removed from it's original briefcase enclosure and was mounted into a slide out drawer under my workbench.
My secondary unit is a custom built computer assisted tube analyzer and the third unit is a B&K 747 for continuity and
comparison, providing me with backup in the event of a failure.
A note of possible interest: when I removed the Sencore's control panel from it's case, I found a Lawrence Livermore National
Laboratory (NASA) Service Technician's punch list sheet with notes, plus additional Sencore documents in a plastic envelope
glued to the inside bottom of the briefcase enclosure which was a fascinating find.
I also have a few other interesting devices tucked away. Some other essential pieces of equipment I have besides a few extra
multimeters is a hand built multi outlet isolated & regulated power supply, several variable DC power supplies and a variable
metered autotransformer.
This equipment is just a chain of readily available components on the power supply end of an electronics workstation, assuring
an outcome that results in the best possible performance from your equipment and the tasks at hand. However a typical power
supply and protection setup like this is not fool proof and can be vulnerable and unreliable under certain conditions, making it
necessary at times to use battery operated (standalone) equipment in conjunction with your AC equipment while performing
certain multi point tests to avoid misleading readings.
All and all, I have enough confidence to use my vintage test equipment without computer assistance, weather it's a checkup,
test and repair job or even on a new build.
Some of the devices mentioned but not seen in this photo are kept in an easily movable autonomous roll out equipment
rack under my workbench.
Recent equipment includes an additional Sencore MU140 tube tester, a Hewlett Packard 339A Distortion Analyzer, a UDB /
DDS multi-function signal generator, a handheld Owon 60Mhz dual oscilloscope with advanced multi-functions and a Heath
Zenith variable isolated AC Power Supply, plus the lion's share of assorted specialty hand tools.