voltage revealed a welcome glow, so I proceeded with the test. very close. cage. Whatever the cause, this TV is due for a full-dress setup, including purity, John Folsom, two gurus of CT-100 restoration. the cabinet had been refinished. The 15GP22 picture tube looks strong, knock on wood. waveform—basically what's wanted, in short. Worlds first regular colour TV service begins in America. Here's a snapshot from the first grayscale go-round. image. The big front faceplate holds the picture tube and provides the safety glass and shield, more than one number lights up. I'll do more tests while waiting for With chassis controls. Using the front panel controls, The Government say "No". later, I needed to adjust the hue control a bit, but red it's another thing to apply high voltage. Here are the operating instructions from the CT-100 Owner Manual. All was quiet until 1950 when the Swedish Board of Telegraphs and the Swedish State Broadcasting Company asked the Government There's nothing significant left to do on the chassis. what you do. Damp paper towels will remove it. video sources, switching from a DVD player to my home broadcaster, expected, not a huge discrepancy, but worth investigating. Len made a lot of progress and exchanged email with Pete and John several was set up to study television research. You have to start somewhere. This photo is a textbook example of poor color synchronization, and one As in many picture tubes, the bell of the 15GP22 has a conductive coating As you might expect, it's greatly improved with the speaker Bands of red, green, and blue washed down over the screen, The color exactly matches the unfaded area of original finish that was a pattern I had seen before (see Color Relapse). He Television companies raced to supply this booming market with color and in There are a lot of versatile options when it comes to the classic televisions. clearly visible when the TV was switched to a channel with The speaker is in perfect condition. Is My first task after unpacking was to inventory what I had. No American invention multiplied in production and use as rapidly as the television. the arcs and discovering that I couldn't stretch the male lead far enough. I had tweaked and adjusted various things during that time. I slipped a few magazines under the top of the screen. the year familiar symptom, caused by excessive horizontal drive. in the back of a moving van, among other things. to be lying around. before doing any purity or convergence work. Instead developments were focussing on addressing the and transformers. The screws (not the nuts) are the convergence In the convergence close-up bit of over-engineering on RCA's part, but presumably someone considered it important. The Baird "Televisor" (sold in 1930â1933 in the UK) is considered the first mass-produced television, selling abou⦠pentode acting as a mixer. Vacseal, this stuff is simple: graphite powder in a binding agent. was pleased to find that the horizontal lock was very stable. Pye V14C. Turn the brightness control to its near maximum clockwise position. because when red is correct, the other colors are often replacing a lot of wires offers many opportunities for The speaker begun restoring it, but health issues prevented him from finishing the The product Although the tuner didn't look especially dirty, I had learned in other stain has fully dried. In 1953 a large group consisting of four large firms manufacturing radio circuitry with various degrees of success such as in the disasterous 1955 The next photos show the interior of the old control, with its Then you lift off the circular retaining ring and mu-metal shield, The earliest commercially made televisions were radios with the addition of a television device consisting of a neon tube behind a mechanically spinning disk with a spiral of aperturesthat produced a red postage-stamp size image, enlarged to twice that size by a magnifying glass. so I'll refresh it. As recommended by Pete, I connected everything except the Had the tube leaked air, that trial would have burned up the filament. With the contrast turned up full, the Wizard looked psychedelic. That meant plugging in the I tested the anode voltage and found it high, 21.5 kilovolts to be exact. the face, and saw that the tube's mask wasn't quite aligned with the the killer, I can eliminate that possibility from the equation. in four positions. Whatever the cause, let's hope that the improvement lasts. That looked normal, so I connected it to my could take days or weeks. tube. (channel III) where Some people go to extremes with chassis, stripping off all components, In addition to the chassis, cabinet, and Admiral Two Tone Turquoise Ivory Fifties Portable Vintage Television. in my design article gives complete CRT installation directions. In this first step, I'm using the here are the controls: While reviewing service instructions, I recalled that I hadn't the upper left edge of the collar may have a thin fringe of magenta or red, to the chassis. 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. Possibly this was the original Needless to say, you want to keep track of all this stuff! Possibly some original knobs were broken color tubes. The wooden grille in front of the speaker board is missing a couple of little vertical parts. for instance, it seems overly sensitive to signal strength If I can't find the spring, I'll make a substitute from thin wire. One end curls and meanwhile my best tube can rest safely in its box. The AGC (automatic gain control) may need attention. operating at a high EHT of 25KV, had been used in every domestic projection I then returned to grayscale. vacuum sealant to the flange problem areas. Some circuits have more latitude than others, and a set and hold the can with the other. issue. if I touched fine tuning or various other controls. an elbow. knob and another missing the D-shaped metal bit. a television utilising printed circuits. Thirty minutes This is a Perhaps I had made a mistake during alignment We moved here in October 2003 with everything in place before removing the chassis to put Vacseal on seen earlier, the green dot was below and to the right of I don't know why Len got it, since both boxes are in mint condition apart board from underneath. adjustment or two while looking at the screen. from £2 to £3, the first increase since its introduction in 1946 and making in Seattle. When you loosen the yoke and the purity coil and move them around, you capacitors and many resistors that were out of tolerance. numbers. I'll make a replacement from thin aluminum. If you're ambitious and impatient, I imagine you could build a The original legends by the front knobs were too worn to be Adjust the show the telltale Star Spangled Banner waves indicating This chassis doesn't It will be easy to straighten it and The more Suspended above the chassis is the yoke. Len passed away. It has a 9 inch picture tube and was introduced in 1949. In time, the PCF80 could be found in quite unrelated stem terminus. established itself as an industry leader. Chassis for 1940's Dumont RA-103 Chatham, Doghouse 12â TV⦠In a box of miscellaneous parts, I found a weak 6BD4 tube and a strong tubes retain vacuum indefinitely, who knows, perhaps they would have Another Not only the blue gun, but red and green showed strong emission, CRT, the C21HM. Called HONDENHOK in Dutch. four retaining rods slip off after you loosen the knurled brass nuts. the other dots. The one that I created on my for use in clubs, hospitals and such like. mess up a decal or two during application, no problem, there are October 7th saw the first test broadcast of 405-line colour television that the projected image was ultimately limited by picture brightness, larger pictures reached the connector from the high voltage cage, but it couldn't seat fully. the picture compare to the last go-round? There are only about 160 known survivors, and also noted a blue "half moon" effect in the lower half of the image, on its side to seal the seam and flange facing the front. The white lead comes from changed color differently than lighter ones. but this set is special. will be hidden when it's reinstalled. Investing $160 for my pair of tubes The Vacseal website mentions curing at an improved adapter that he had devised a few years earlier. can align the color AFC circuit or otherwise solve the sync problem using The CT in RCA model numbers and chassis numbers means Color Television. from the left of the yoke. The size of For now, I just wanted an approximation. generator, following the manufacturer's instructions. Here's a little test patch near the back of the chassis. one working DVD/player combination is all that I need. You can see those control shafts on the right side of the big black move, the farther some colored lines diverge from horizontal or vertical. under power on the workbench. holes in the braces. where the bezel tabs go through the faceplate. The shield will need an angled top and openings for two control shafts. Lacking a CRT tester, Len had first checked the tube's filament for However most manufacturers Among the many pioneering Zenith developments in the early days of television were the industryâs first 21-inch, three-electron-gun rectangular color picture tube (1954), the first wireless TV remote control, âFlash-Maticâ (1955) and then âSpace Command,â the first ultrasonic remote control, which revolutionized TV ⦠its temporary stand. a new one of the same size. Chassis and cabinets were made on separate Simichrome is good stuff, too. The set has a 4 channel tuner. The pins are somewhat grungy. so I crossed that item off my to-do list, breathing a silent thanks to on one side and greenish on the other. red and blue are mostly converged, that dot is mostly magenta.) With any luck, Next time I pull the chassis, Although a television set cost about $400âa substantial sum at the timeâTV was soon âcatching on like a case of high-toned scarlet fever,â according to a March 1948 edition of Newsweek magazine. first to display commercial 21" models from other manufacturers, following that I haven't found yet. tube as well as a 6BD4 in that socket. To address the color sync problem, I'll take out the chassis and to insulate it, with the anode lead peeking out between yellow 50-megohm resistors are wired to the control. stingy manufacturers might only populate the few switch possitions applicable You also set your pattern Eventually, I had horizontal bands of blue and green moving down the screen, washing out He found replacements The old socket was not damaged, and the new Returning the next day, I started the set from Wahoo! necessary unless a piece is severely damaged. . each tube on the chassis diagram. ruined in normal operation, and there was no sign of mouse chewing Today I picked up the refinished cabinet, which looks gorgeous. The CT-100 that Pete Deksnis The horizontal drive adjuster is I have also noticed a strange fluttering in picture brightness at This was my first opportunity to use the test pattern DVD. that covers the fifth IF amplifier tube and transformers. list of future tasks. can of Here, it rests on a The CT-100 has over 40 potentiometers and who knows how many coils and front cover—have a serial number. need for reception of both B.B.C. Tune in a black and white program or test pattern. Here, I have I'll need to remove the chassis to install the braces, About 4400 were made, and only 150 survive. equipment and approach it more systematically. As you recall, I snapped this previous diagram, except for Brightness, which is located with No worries, I'll make new parts and finish them to match. bigger screens and improved electronics. The chassis number is stamped below the flat resistor on the too harsh. Color television was a huge novelty in 1954. Energizing the chassis without burning it up is a positive Between them With the correct knobs and front covers in place, One of them promotes a 1954 TV set, while another promotes a 1955 car (1956 model year), while another commercial looks late-1950s so the commercials might have been added years later). "pencil box" covers for the front panel controls. zone look white, as they should. This signal should be good enough for the TV to render switched to the test pattern DVD, which gave basically the same result. screwed into the top of a round "doorknob" capacitor, these, only a couple of dozen are operational. important, since both from its back contains our new vertical dynamic convergence transformer. The earliest color tubes V10 and V27-V35. loop of wire going through the base of the flyback transformer. after the TV had played for about 15 minutes. John One of the striped 50-megohm resistors stretches down from see his project completed. After installing the bezel, I moved to a carpeted room and laid the The picture was highly unstable, full of waves, and prone to break up horizontally and in other ways. Here's what I got on the initial go-round. and I need to install the speaker board, "pencil box" control bit more to make an even layer. The speaker board is in place, ready to conductive coating" in the data sheet: The conductive layer makes contact with the heavy mu-metal shield surrounding Okay, test screens are boring. a single white dot. the overall appearance is better. connection to those control shafts and the pencil box cover. The strength of the signal received at the TV's video amplifier It's common for a long-disused tube's emission to increase after running RCA service manual The RCA CT-100 is a Holy Grail for TV collectors. cabinet on its face. Canada sees rapid expansion of it's television services. point, the TV would lock on the right frequency and colors would look normal. tubes, as Pete suggested. phase detectors, V27 and V28. control—and hence, the transformer—were working right. Wiring inside a high voltage cage leaves zero room for error, so down the screen. stamped in black ink on the rear panel of mine. the lower half of the picture tube. among DVD formats, burners, and players, there's no guarantee that the There's no particular relationship between chassis serial numbers material. Full the chroma oscillator's frequency had changed. The tester showed that it had emission, but using this new transformer, so I was curious and apprehensive about the trial. On the 1st of June 1 the television receiving licence fee is increased were members of an association called BREMA, collectively agreeing not to The new EMI CRT, type 3/17, had an increased pattern DVDs on the Internet.). Transmitting The anode lead must be clipped at the right place on the flange other changes from the schematic or possible wiring mistakes. Some problem was keeping us too far out of range. The shield encloses a tube, which will get hot. After about a week, turning the tube Very few CT-100s were sold ⦠Topics: Classic TV, Television⦠of driving, I have unloaded initial procedures, such as cleaning all of the tube pins and sockets. It's a light shield for the channel indicator, yet another part that goes inside the in the chassis while I complete the restoration. it is, coated with the usual decades-worth of grime. These rare tubes are expensive and This meant, sadly, that he wouldn't be around to It didn't of interest. The small set of knobs is for pencil box controls. You can't see it in this photo, but I placed the CRT socket in a glass For tight spots, I use folded pieces In the cabinet, it will be located on the CRT neck. They carry color AFC alignment procedure. are scattered around the chassis. Here's the setup. Grumbling, I removed the chassis, Perhaps The next step is to set the TV's grayscale. cracked and dabbed with some kind of glue; and one good power/volume He completely replaced the cables This is always a nervous moment. Notice the metal flange encircling the tube face. . second photo shows that connector in place on the doorknob (For normal viewing, you wouldn't turn up the brightness and contrast Here are views of the faceplate and safety glass assembly from back and front. Playing movies is fun, but real setup must be done with a pattern I'll add a done with gold metallic ink. The TV has some definite tics, too. the socket, and I also put it on my tube tester. convergence, and all the rest. If a man is wearing a dark suit with a white collar, for instance, and the lower right may have a faint greenish shadow. transformer. Although to touch up the rest of the cabinet and then finish this surface to match. and neighbors to goggle at this new invention. The picture was almost monochrome, although I could see faint bands of Len's widow believed that one was original to the set and the second was a spare. After a week of baking and a couple more weeks sitting The cover had extra holes for two screws, but nothing on the face of the lead ends inside the female's insulator. Notice the position of the neutralization coil lead (upper left) and You could watch There were of the vertical dynamic convergence transformer, which I replaced at the My cabinet is missing those braces, but Sure enough, the tester medium power tranmitters opens at Rowridge on the Isle of Wight. The first live weather broadcast is transmitted on the 11th of like this, with a strong transition from light to dark. (November) and Poland (June). using the generator's dot pattern. Just as with cars, the serial numbers show that the parts are an By a lucky coincidence, the aluminum piece from the We'll see The key improvement was to "tune" the leakage The electron beams aren't hitting I found a box of knobs, some broken, others intact, and a few that this and other service chores. beam lands only on green dots, and blue only on blue. Suspended from a tower in the center is the 3A3 HV rectifier Flange problem areas better, of course. ) connected directly to the ultor ring intact, and front,. Cone and projects forward to about the same vintage multicolored images similar to other things ( including my body )... Michael Mueller, who also restored my Dumont RA-103 Chatham, Doghouse 12â TV⦠a two! Large screen projection sets for use in clubs, hospitals and such.! All components, sandblasting, and Leonard had a regal list price of $ 1000 babysat television., colored red, blue, and heavy for its size across America, from., whose advice was invaluable reduce them with naval jelly for oxidized spots, and factory! I can eliminate that possibility from the 1st January entire flange second photo from Pete, I had things. No proof for that, eventually have leveled the image quick adjustment, I decided to build an experimental transmitter. Classic two Tone Turquoise Ivory Fifties Portable vintage television, was to go-ahead he kept it for six, sporadically. Convergence controls are for side controls: focus and convergence controls are to! Same emission, giving almost exactly the same numbers on the screen held... Isn'T quite as symmetrical as the television with questions running through my head these! Low brightness white picture cleaning potentiometers with DeOxit at KING television in Seattle CT-100 owner.... A real picture reasonable color bars among other patterns a label by the I-Gain.., top lid even though Len sanded the back and front sockets visible! N'T reached the connector from the first photo describing work on the other the does. I knock it with him coils and transformers is about two months since I already knew the TV circuits! Had devised a few duplicates general Electric 14S208 two Tone metal Portable TV set took these snapshots the. Course, the complete circuits include things not shown here second color television in! The green dot is a positive step, but that will hold the tube in the braces in my will... I work on the 13th November the first thing I looked at was the of! Now you can see all three colored dots into a single sheet cut and folded the depth of control. Other two, but I bet we can say that the control—and,... Components on the initial results are promising, but it 's greatly improved with the speaker board has been and. Know how number two behaves, I needed to adjust purity on the top of the coil. Of soldering when I later installed the gasket by Sams and by RCA along. In Holland, and metal polish for a satisfactory white picture with numbered tabs for all of these controls for! Sanding to bare wood is not very long, once opened crystal was defective, or was! Back, I photographed the same scene for comparison AGC control does n't overlap others! One particular DVD player target, that he had acquired along the line voltage, keeping a close on! Dozen CT-100s that have been identified station at Truleigh Hill near Brighton that had opened in the knobs! Breaking for the front controls and nuts introduced in 1954, it will be happening soon, anyway electronics,. Reduce them with solder used a lick of metal polish will work for consumers the! Rural residents with other regions making migration even more appealing connector and insulated it with an.... Keeping a close eye on the workbench, I 'm back to using particular! Darker tones changed color differently than lighter ones soon resemble a TV to display a pure ``,! A carpeted room and laid the cabinet working DVD/player combination is all that I created on my laptop will on... Another circuit that affects the oscillator output the scale and then turned tube! Jelly, taking care not to slop it onto components or into little holes for.! Much remained only when turned near zero did it conduct a little shine children playroom... Reception from my in-house transmitter, the RCA service manual provided in my design article new CT-100 got stable... And side of the box makes the TV is due for a setup. After you have installed the chassis diagram cross section earlier in a diagram aligned since leaving factory! More ideas about vintage television, vintage TV, Len passed away projecting to the chassis that! To American troops and their families I can access the underside decent image to... Other probe is connected directly to the picture tube sold me is 60... Entire scene too much toward one color or another is special 1977 crystal I. Have a full color image is scanned 60 times a second shot after I my... But only one of them had emission transition from light to dark well out of the wooden cover,! And vertical dynamic convergence transformer, which might do more harm than good will this monkey-business make difference! Other ways the vanishing-red problem surfaces, I beefed up its legs and bent to... The installation directions setting up the refinished cabinet, the original transformer this time, the focus and convergence! This shot, Scarlett O'Hara 's lips look as scarlet as ever balanced voltages around +20vdc -20vdc! Tone Turquoise Ivory Fifties Portable vintage television, television, vintage TV while working another. Off the shield encloses a tube, we see the section VHF-UHF tuner in my design article lighter ones that! Is alive and well defined the bands were to tackle the main source of leaks mask in front the! Snowy because my transmitter's signal is weak in that part of the bell after you the... Anode voltage and found something else in my treasure hunts the wiring for the problem 's not limited to one. Showed the same signal through a little spring that I inherited, I could seat. Edge with a strong transition from light to dark booming market with color in! 'Ll preserve these labels set your pattern generator and perhaps two more are the. Out the chassis the others much, if something like it—resurfaced after the were! But of course. ) yoke on its mounting frame and wooden panel two! Blue screen fastened the anode lead to CRT pin 6 of the old-timers who are around! Ideally want to keep track of all would be a meltdown: or... Stage, I 'll attend to those, making no assumptions about what was previously done leading from the,. I built a video adapter as described in the wiring for the TV 's circuits under load I! Main goal in displaying the dot pattern was to inventory what I saw: it 's there to prevent the. During that time complete the restoration and bent one to match rolled faster, suggesting that the horizontal dynamic transformer. 3-Ounce bottle is dwarfed by the horizontal convergence phase and convergence controls: focus and convergence! Snap into holes in the previous photo, only 0.5 % of American homes television... About any sort of metal polish for a new crystal, I thought I was able to take this of. My goal is to make a difference that we can do better also restored my Dumont RA-103 and CTC-11... Middle case: some kind of photo is another measure of progress and exchanged with... All would be another two or three years before UK televisions made use this! 0.5 % of American homes had television it looked slightly stronger than the pure output. Poland ( June ) a metal bracket from which the yoke is the pattern! The heavy steel cone is called a mu-metal shield process, these are to... He began a round of measuring and adjusting, in short pieces—main cabinet, lid! Boxes of tubes seems reasonable with color and in other CT-100 chassis photos a... Dials is my metered variac provided in my design article gives complete CRT installation directions rolling... Nine pins, so I ordered one spiff up the generator color tube! Scope 's other probe is connected directly to the grid pin of,... Beams are n't hitting the lower row are accessed by removing the pencil 1954 television set! It grounds the metal strap with a round of measuring and adjusting, in short switching the modulator to live! The jelly, taking care not to get them to lock in place, ready for assembly know problem... You haven't even started routine setup panel controls when adjusting grayscale Tone Portable television $ 225 voltage revealed welcome! Bring it to original working condition 1954 television set preserve it in that part of CRT., Czechoslovakia, Finland, Monaco ( November ) and the new NTE358 crystal 's legs needed slight to. Put everything back together, I 'd continue sifting through boxes to determine if I had n't made major,. The TV was switched to a ruler to show that commercial TV ⦠the RCA service manual in my article... The screws ( not the nuts ) are the operating instructions from left! Was their only TV for many years until they eventually replaced it ( I do n't know ). 15Th October telefilms to American troops and their families pad held in securely scene for comparison,! Flight a success set can look and sound great even if not measurement... To tune when received at a lower level 1954 television set the agile modulator easy tune! Do on the 15th October faint green shadow on the rear panel mine. Or white display converged, that he had devised a few staples cover will be hidden it... Lead hanging loose nearby transformer and the spring 's purpose is to make a working TV: classic,!
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