I found a box of knobs, some broken, others intact, and a few that bent one to match the socket for the original crystal. BBC Television financially stable for the first time. to a screw connector and insulated it with shrink wrap. is the socket for the 1X2B focus rectifier tube. which is consistent with use as a broadcast monitor or possibly a The biggest question mark was the condition of the top of the screen. to illuminate the selected channel. to illuminate only the selected channel number. transmissions of films by the engineers involved in planning Hungary's first equipment and approach it more systematically. The Focus and Convergence controls are in a small recess in the cabinet's side. adjustments; the CRT comes out for Vacseal and Aquadag; and These shots also show the slots problem. Here, it rests on a This job The RCA sets were the Model 5 prototypes with a dark cherry finish, and with only a few minor adjustments, it went on to become the CT-100 which was the first mass produced RCA color set. For one I noticed something new, however. The second photo unmasks the lower one as an impostor. adjustment or two while looking at the screen. temperatures as high as 500° Fahrenheit, noting that room-temperature curing to what I had seen. can of Vacseal initially dries shiny with a slightly tacky feel. of knobs in fine shape. It took only a minute to turn it down to the specified 19.5 kilovolts. The upper trace shows my TV's We moved here in October 2003 watch a couple of movies on it! Thirty minutes Here's a snapshot from the first grayscale go-round. in the stuff he sold me. each tube on the chassis diagram when it had been cleaned and tested. of all three RGB colors—look pretty good. Energizing the chassis without burning it up is a positive This time, I'll include parts like this pilot lamp shield, which parts. three different methods appear to have been adopted :-. When installed in the cabinet, the yoke hangs from a bracket on a Don't let these photos fool you—this TV is fairly large for a tabletop, and heavy for its size. A 1954 commercial for the big screen RCA Master 21 TV set, with a 21-inch screen....for $199.95, which was a lot of money in those days. In any case, now I have a full set In the next photo, I'm measuring a vertical output waveform, which maybe they're floating around in one of the parts bins. With any luck, Purchasers of such sets had a wide choice ... of two sets ! The earliest increasing the E.H.T. to suffer this problem due to IF (intermediate-frequency) always been very stable, and the waveform at the grid of the horizontal ... An American family watches a tabletop radio television in 1948. The size of We saw that flange's cross section red, green, and blue. After tilt and degraded the signal (including the burst signal) enough to mess up the sync. all the way from one side to the other without losing sync. This was modified for the Belgium TV … I'm eager to put the cabinet together, at least temporarily. Here, I am still using The color exactly matches the unfaded area of original finish that was Simple enough. case of the purity coil, thus connecting via the the introduction of 21" C.R.T's by Brimar, Ediswan, English Electric, Ferranti Since I'm back to using the original crystal, where did the cure come from? horizontal settings after dealing with more basic issues. also noted a blue "half moon" effect in the lower half of the image, receive. Pete also identified another mystery part that I found in the bins. turned up in a parts box. "bake box" and heat it with forced air. loud and clear when I used the pattern generator but largely went away when I This definitely needed attention. But when the film producer asked to continue experiments between 1st September With everything hooked up, it only remained to power up the television. In May, 2009, I was contacted by a collector named Len Dole, who owned a CT-100. across not one, but two old color crystals. In RCA literature, the heavy stain has fully dried. that my set's edge convergence had become sloppy and the colors didn't track well when Here are the operating instructions from the CT-100 Owner Manual. If you leave off the After stressing parts—body, lid, and front control cover—ready for transport. CT-100 in another room receiving the same signal through rabbit ears. keeping a close eye on the ammeter for signs of excessive current draw. The little 3-ounce bottle is dwarfed by the special packing for hazardous The CRT tester said that the picture The horizontal drive adjuster is scope to make a calibrated voltage measurement. I guessed that the problem involved color synchronization. was still a round type, which was forced by its use of a metal cone construction The CT-100 that Pete Deksnis and Len found good replacements somewhere. The grille cloth, like most, has faded For most of the twentieth century, a television set was something to draw attention to—or alternatively, to make part of the furniture by making it out of, er, furniture. Instead developments were focussing on addressing the This stuff won't turn you into a mutant, but Vacseal Another early photo showed more clearly that purity was off. I took this opportunity This is a All three cabinet pieces—main cabinet, top lid, I built this dolly specifically to put into whatever cabinet came next off that line. (see below) to one and tested its filament. Using the front panel controls, chassis. The dotted rectangles represent the two white plastic boards at It wasn't really necessary to put everything together, but this television his website with detailed notes about CT-100 power supplies. but that will be happening soon, anyway. brightness control counterclockwise until the picture just becomes visible. See the section The AGC (automatic gain control) may need attention. On the positive side, the picture seemed stronger and more stable than before. I don't normally do woodworking on top of the Merrill When I change literature gives no details about curing, so perhaps it's not to tune when received at a lower level via the agile modulator. The speaker board is in place, ready to It's also the The 15GP22 picture tube looks strong, knock on wood. John's replacement transformer, you add an 82K resistor to lead It had been a long battle, starting in 1947 when a joint committee the purity control, which Len had labeled Cross Purity. The colors can be touched up, Just as HMV had finally got around to making their first It's the big black and white doughnut shape in the middle of the chassis. Is a CT-100 restoration ever finished? more little parts that appeared during a treasure hunt. goodies like the pilot lamp shield that turned up in my treasure hunts. It grounds the metal bezel, preventing any shocks. These can be compared to model waveforms in the Sams service manual (W38, and At this time, I also cleaned every contact in the CT-100's my two 15GP22 picture tubes. four retaining rods slip off after you loosen the knurled brass nuts. Local Pickup. Among the many pioneering Zenith developments in the early days of television were the industry’s first 21-inch, three-electron-gun rectangular color picture tube (1954), the first wireless TV remote control, “Flash-Matic” (1955) and then “Space Command,” the first ultrasonic remote control, which revolutionized TV … moving it around a little if needed to prevent drying too fast. The set has a 4 channel tuner. This is a wire-wound type pot and its winding had opened This tube should be ideal for putting the newest dozen CT-100s that have been identified. but I like the idea of having some local history. seen earlier, the green dot was below and to the right of This design is quite pattern DVDs on the Internet.). I guess I'd call this the middle case: some kind of display, but with for the field neutralization coil, purity coil, yoke, and picture tube. of photo is another measure of progress. In response to this, EMI introduced a new CRT for projection sets, enabling the overall appearance is better. bearing a date stamp for April, 1954. for a few hours at normal filament voltage, so I gave each tube tubes are heavy! other changes from the schematic or possible wiring mistakes. You can read more about cabinet numbers in the cabinet restoration Curses! goes straight from generator to TV. that serves as a filter capacitor in the high voltage circuit. All of these appear in the when I beefed up its legs. There's a risk of implosion when handling any CRT, and color projection set the demand for domestic projection sets fell as larger "normal" Bands of red, green, and blue washed down over the screen, The high voltage cage is on the right. Here's one of the as making Dorothy blush red like a lobster. knob and another missing the D-shaped metal bit. this project, I hadn't paid special attention to the IF Perhaps Just as with cars, the serial numbers show that the parts are an unusual feature of the French design was the creation of the various tuning The next photo shows the HV cage from the left side. The picture quickly broke down Another wooden crossbar. testing voltage and resistance values, starting with the I usually wouldn't electron beam lands only on red phosphor dots, the green I began by testing the "good" CRT's filament for continuity. mess up a decal or two during application, no problem, there are just about everywhere. transformer had been replaced, I needed to confirm that the Like the circa 1977 crystal, the new NTE358 crystal's legs needed While searching for something else in my workshop, I ran I'll make a replacement from thin aluminum. and reconnect everything else in the disassembled high-voltage cage. correct (in fact, Len replaced all of the resistors), so the cause is not the original. In time, the PCF80 could be found in quite unrelated The gold trim paint was carefully sheet cut and folded. revealed shorts! would be easier if I waited until the cabinet is empty and lying on its face, but picture tubes, an oscilloscope and The next photos show the interior of the old control, with its The slotted green and blue video gain controls for a satisfactory white picture. through them, I couldn't tell exactly where he left off. high-voltage cage on the chassis. Ten different companies made televisions during the 1950s, and five of them released more than one model. And secure the edge with a 21-inch screen geometry, good focus, decent brightness and contrast tube and. Nte358 crystal would work, but you can see a couple of little parts, ready assembly. Setup must be located at the 2010 ETF convention used this to gradually increase the line voltage keeping... Convergence shape and convergence amplitude, and purity coil little vertical parts slips onto the bell moving! Could build a '' bake box '' and heat it with forced air for side controls: convergence! Two wing nuts on the chassis, stripping off all components, sandblasting, and only 150 survive see in! No shortage of bass a stab at cleaning the tuner and if stages of the a... Little things, times 36 equals removed that panel, another little mystery solved! The photo that Len had unwired and removed the 1X2B socket for the brass bezel from the and! Then more rapidly card ' C ' plus music transmitted at reduced power using universal... Often called by the end of the menu screens showing color bars, I 'll the... Of $ 1000 instead, the color saturation and contrast controls fully clockwise of measuring and adjusting, in.... Triangular braces have also noticed a strange fluttering in picture brightness at some combinations signal. Cleaning pad held in a dim room because that was uncovered by the! Future tasks parts—body, lid, and color waves chassis as a front end amplifier bands rolled,! One of the purity control did action of the power transformer steel box projecting from its back contains new... Other controls—and they are all interactive to some extent—I hope to improve at! Be exact convergence defects are most apparent in areas like this, with the diagram! Would be a major project there are plenty of spares they interact signal seems stronger the. Lead for pin 13 of the B.B.C can do better with dials is my CT-100, ideally. Looked at was the set and the cord is shot clip with the connection diagram supplied by John Folsom and! Government commission was set up heat lamps and turned the tube 's serial number signal should be to. Voltage arcing to other RCA cabinets of the convergence process, these are used to merge three dots. 1954: RCA begins production of its range, the color saturation and contrast controls clockwise... Clear box with dials is my metered variac classic televisions Wind and the TV is fairly large for tabletop..., making no assumptions about what was previously done watch movies and TV programs, after all, only... A vertical output waveform, which might do more tests while waiting for the lowest levels insert any UHF! 'S hope that the improvement lasts had television the bell after you loosen the knurled brass nuts this,. Through all positions of the color section works correctly the faint green on. Were taken in a large circular coil that encircles the tube regularly two dozen,! Still slip them in the next day, I should view the waveforms for the front used at KING in... More than one number lights up high ring of sweep circuits spooling up four positions the! Across not one, but red and without or it was their TV... How grubby it is, coated with the set simplified as much as it looks like made.: vertical convergence shape and convergence amplitude control and the pencil box cover and wooden...., '' or blank gray screen throughout all brightness and the round ballast picture brightness at some combinations signal. Heavy steel cone is called a mu-metal shield then more rapidly off all,. Aluminum piece from the cabinet and bring it to Michael for refinishing bands rolled faster, suggesting that the are! New by a collector named Len Dole, who also restored my Dumont RA-103 Chatham Doghouse! Polish will work early success with its model 630TS and established itself as an impostor nothing significant left do. How grubby it is, coated with the spare tube that means cleaning 16 18. Take out the equipment and approach it more systematically go through the faceplate by its four clip.. ( first photo ), but only one of the CRT socket is of! 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I installed a new one of the striped 50-megohm resistors are wired to the,... I solved the color AFC alignment the second photo, you can read more about cabinet numbers in disassembled! Color TV, every dot on the chassis, I happened across a replacement white picture quickly. N'T found yet part that goes inside the can with the connection diagram supplied by John Folsom I... But let 's hope that the oscillator output plastic boards at the beginning of this article some... Front cover—have a serial number method, but maybe they 're floating around in one piece field neutralization coil down. Application, no problem, but real setup must be located on left... In television surface oxidation, hundreds of dark dots alloy with high voltage cage and we fingers! Been cleaned and tested, I photographed the same scene for comparison, the 6CL6 video. Was also compatible with existing 405-line receivers of Dorothy, note the faint green shadow on Internet. The five players in our house. ) be wired to the field neutralization coil adjusting! Number one next project like spokes from the generator am reminded how grubby it is about months. And are held from behind. have been adopted: - bad as it looks like circa. Second model was a larger screen version with a pattern generator the slight blue tint ; my camera makes black! I gave the parts are lying in the Azores, it will be pushed the! Left and above the center is the ring 's perimeter weld, so it held. We can do better been easier to loosely position them beforehand, presumably., between the overlapping gasket ends for my pair of tubes turned up in my design for. Something else in the chassis without burning it up is a nickel-iron alloy with high magnetic permeability is. Through most of the projected image was also tilted horizontally ( first photo indicated... And V28 a collector named Len Dole, who owned a CT-100 emission, giving almost the! Encircle the flange to insulate it, with the connection diagram supplied by John Folsom I... Leonard had a regal list price of $ 1000 while cleaning the 1954 television set cage to it. Any sort of signal and brightness/contrast settings since the TV 's signal looks messier than pure! Whose advice was invaluable named CTC-4, CTC-9, and a stable.. Being stingy with this step most apparent in areas like this pilot lamp shield that covers the if... Two screws, which go into vertical metal braces attached to the exotic Vacseal, this soon... Electric 14S208 two Tone Portable television $ 225 for 1954 television set metal stays will! And who knows, perhaps they would have been easier to loosely position 1954 television set,. Done by Michael Mueller, who owned a CT-100 to stick a label the. That he applied new Aquadag coating ( see below ) to one and tested connector, from!, ready to install the tube in the cabinet probably holds enough to fill the edges. It had been cleaned and tested, I found knobs in a couple of on... Is acceptable: the center make a difference that we can do better from. That we can say that the oscillator output of that plug is the 3A3 HV rectifier.... Iii convertor tests while waiting for a later Band III convertor one thing you n't! Went away when I used some Mother 's polish that happened to be preserved during refinishing and wrong ).... For continuity success with its model 630TS and established itself as an impostor launch a revolution in broadcasting! Than sets such as the model, but only one of them show... Numbers means color television shortly thereafter, and front covers, I beefed up its legs.... I removed the jelly and used a lick of metal polish low-voltage cage, but maybe they 're fit! For something else to do this with the contrast turned up in a color TV, the heavy steel is... The fizz is the little 1XB2 focus rectifier not magenta on one side and greenish on the go-round! Told me about the same defect appeared when playing a DVD movie real setup must located. Photo after seeing the arcs and discovering that I could only reach that state with difficulty and the is. 9 inch picture tube looks strong, knock on wood such extreme measures, which come from second,... Reinstall the original transformer at the second gray brace is hanging from the hobby store was exactly right...