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This is my NEC 19" Multisync E900+ CRT monitor at home. I'm so tired of using this behemoth of a display.
Here's a World War II-era oscilloscope. These early devices lacked a lot of features that come standard on modern instruments--basic things like trigger circuits and calibrated reticules.
There were still many measurements that could be taken with a device like this, such as the following:
* Comparing some input frequency to a reference frequency, or a ratio thereof.
* Amplifier distortion (plotting the voltage transfer curve of the amplifier)
* Measuring the hysteresis loop of an inductor (BH loop)
* Measuring the peak-to-peak voltage of an AC signal (by comparing to a reference)
* Checking RF modulators and demodulators
From ca. 1982. It looks incredibly like an ADM-3A. The code is from 5-6 years later. I don't have much C code lying around.
This is a picture of our theater. It's a double exposure to get the look of the theater along with a good shot of the movie. This is taken from the armrest in the middle of the second row of seats. This row is on a 12" riser (stadium seats).
The projector is a Marquee 8000 run off my HTPC.
This instrument had a squished image (see these photos), but I fixed it!
If you have an HP (now Agilent) 54600A oscilloscope with this problem, I suggest you check out this Agilent forum, wherein someone suggests a dried-out electrolytic capacitor as the cause. The forum says that replacing C609 (C651 on the schematic) fixes the problem for some units. That didn't fix my 1991 unit, but I replaced one cap at a time in the vertical scanning section and when I got to C608 (C624 on the schematic), a 10µF, 16V capacitor, literally a five-cent part, the image was restored to its former glory.
It's a CRT from some sort of Tektronix test instrument. I've guessed at the Tek part number: 154-0667-00.
Perhaps it's hopeless to ask, but does anyone happen to have data on this CRT? Even just a schematic from an instrument that uses it?
And here we have yet another restoration project, caught right before I started. This victi--err--patient is a Clough-Brengle model CRA Cathode Ray Oscillograph. It was manufactured in Chicago around 1935, and was first available for around $80.
Originally the faceplate would have been silver colored, but age and possibly sunlight has caused the lacquer to assume an elderly golden glow. A metal shade would have fitted over the 3" round cathode ray tube to shield it from ambient light, but that piece is missing.