My father served 26 years in the US Navy as an electronics technician. When I was a small child, he built our first TV set, and when he retired in 1965, he owned and operated a TV repair business. He was a wizard at TV repair. Just a test or two and he could pinpoint the problem. I even saw him look at the TV and from the symptoms he saw on the screen he could figure out the problem.
LED TVs of this time cannot be repaired.. 95% of their damage is a broken screen, which is priced at the price of the device It revolutionized the manufacture of screens.. Yesterday I bought a 32-inch TV at a price of 100 dollars... There are computer games with a screen size of 7-10 inches, the price of which does not exceed 45 dollars.. And a used computer for 30-50-100-200 dollars? There is no need to repair the device.. Throw it away and buy a used or a new one?
What a rat nest. Can really see why printed circuit boards became a thing. Great video! I appreciate that you care about old tech like this. This is history, and it's worth preserving.
It may have been a rat’s nest, but if the assembler had good soldering skills, it was much more reliable than early printed circuit boards which suffered from thermal cycling that could cause hairline cracks in the traces which were maddeningly difficult to track down and fix. As such hand-wired sets such as Zenith models didn’t fail as often as often and were considered to be better televisions.
@@bunkie2100 'Hard wired' all the way was pretty much the case for the apollo moon shots as well. Sensitive modern day electronics will require a lot of shielding to survive the harsh rigors of a moon mission. The present day Artemis programme should lead to some interesting developments in rugged electronics that can be monitored in real time by a human crew. This will add to the knowledge data base of whats already known by autonomous Moon and Mars probes and rovers.
@@jdflyback Hi! I'm studying electronics. I watched your video and got very interested. Can you send me some pictures of the electrical schematic of this television, so that I can analyze it? If you have the pdf file, can you send it by email?
@@jdflybackI don't think any of our ancestors or the inventors of this TV would have ever expected to play anything modern these days. They must be cheering in their graces for your achievement.
i remember going to an electronics club at the school but the teacher Happy Harry as we used to call him really knew nothing about electronics it was one of the sixth formers that built the projects we called him happy harry cause hed got a permanent smile on his face
Really cool the way you went step by step to see how each failed cap affected the circuit! It was much more insightful and interesting than if you had just blanket-recapped everything.
I never knew the picture on those could be so clean. I just imagine the picture would occasionally bounce around or have constant noise... to see such an old set working so well is amazing.
I always find it amazing that old electronics perform better than when they were brand-new just because you used modern caps. capacitors back then were really, really trash.
a large part also has to do with the camera recording too. he was using a modern camera to capture the video he was playing. Cameras were not the best but it was the best they had.
Those old sets had pretty good pictures given the limitation of the resolution, which was 525 lines. In addition, most recorded programs were shot on film which explains why TV shows like "Hogan's Heroes" from the early 1960s has such an incredibly high-resolution picture.
@@nukester. The NTSC standard for analog TV is a frame rate of 30 frames (images) per second, consisting of two interlaced fields per frame at 262.5 lines per field and 60 fields per second.
Didn't think I would be waking up on a Sunday morning to watch someone repair a vintage TV, but here we are! Nice way to start the day to see how old electronics work.
Many musicians, especially electric guitar players, still prefer tube amplifiers to transistors. Until it was stollen, my stereo system was all tube-type equipment. Couldn't afford to replace it so now I'm stuck with transistor stuff, which just isn't the same.
Who needs to restore old TV crap ? why you need more people ? Why you never get hits ? What did you do so far ? Not interesting, who needs skills here ? entertain them with nerdy crap ?
@@audryhaynes3277Да, я так же считаю , что и "место" транзистора - где угодно , только не в звуковоспроизведении. Но ,что поделать, приходится следовать "прогрессу"(принудительному). В то же время понимая,что в ламповых усилителях отсутствуют четвёртые гармоники, а в транзисторных - слышны шестнадцатые.Это я вспоминаю по статье в журнале "Радио".
Loved the video. Reminds me of a 5" TV I built it 1956 when I was 16 years old. It used a 5BP1 ex radar tube with a green phosphor. It always had issues with poor vertical lock but it was a design problem in the original hobbyist article and I didn't have the skill to improve on it. Many good memories of my early days whilst watching this video.
Making a custom tube is not that hard, getting the Forsfor on it is a bit harder, but we can do that too, only if you can tool the right tools, or can find people who can do that for you ! Upload what you did please !
Electric charge internal deflection plates? I've wondered how well a radar tube would work on 525 lines. Seems like it would be overwhelmed. That is an amazing build for any 16 year old and 1956 quite the bleeding edge.
Went down the same road in 1968 (age 18) with a VCR139A (2 3/4"). I began two years earlier but couldn't make the TRF vision receiver stable at first. In those days, we still had 405-line TV on 45MHz so, following the line of some of the early UK sets, bearing in mind that pre-war there was only one TV channel, the TRF route was possible. I still have some of these early electrostatic tubes and with a sprinkling of transistors, might put together something similar but video source would need to be a DVD player or similar.
@@directcurrent5751 No reason why ES would not work on 525 or 625 lines come to that. Here in the UK 405-lines was not phased out until 1986 and 625-lines was introduced in 1964. It can be quite a challenge if not near-impossibility to persuade a 405-line LOPT for a magnetically deflected CRT to run at the higher horizontal frequency but no corresponding difficulty converting an electrostatic timebase.
Takes me back to when I was a TV engineer starting in the late 70s till the early 90s before I moved to cable TV and telecoms. It was satisfying to fix tv's back then and on a winters day in the workshop, those old valve tvs could keep you warm 😊
When I was a young engineer at RCA in Camden NJ, about the same time, the heating system in our 1910-era building was about shot, so we turned on the old tube-type Tektronix oscilloscopes to keep the lab on the corner wall habitable in winter. LOTS of tubes in those, plus a fan to move the heat around.
This video was a delight to watch. This was our first TV. My parents (Dad was W3NVS ham radio operator) bought it from a childhood friend in 1949, who was also a ham radio operator, that owned a TV/Radio repair shop. Ours was the first TV in the neighborhood and we kids would all come to my house to watch Captain Video! At a discount, I think my dad paid something like $130 at the time - a LOT OF MONEY. Later (in 1957) I became W3KYN and am still licensed as K3GW.
I am an electronics tech and started my teenage years first on radio then television in the 1960's . Here in Australia we didn't have series string heaters and direct rectification from the mains to supply HT to the vacuum tubes. A mains power transformer was always used in Australian made sets as at 240V 50 Hz mains the dangers were considerable with potentially live chassis unless an isolation transformer was used. With only 120V @ 60Hz the potential for electrocution of the operator or tech was considerably less. Another comment is that digital multimeters are not as suitable for this type of repair as an older 20,000 ohms per volt analogue instrument. Especially for reading resistor values and capacitor leakage. A digital meter will lead you up the garden path during logical fault finding, only use them when great accuracy is required, in an older set like this, it's basically not ever required . When calculating a capacitor value to use as a ballast resistor use the capacitive reactance equation ie ; XC= 10 to the sixth power over c x freq x 2 pi , where c is in microfarads. Transpose as required. I was a SGT in the RAAF teaching electronics in my last years in the service. Robert
Some of the people I ended up teaching sadly would never ever have made top notch techs mainly because they didn't ever have enough interest to apply themselves fully. The same in every field of professional endevour , some actually liked and applied themselves to the profession, some were just along for the ride and it showed.
Just never power it up when you work on them, not a big risc that is! Australia is UK/ EU system mixup, you can by local Japanese systems! You restored models, can you upload videos please !!!
@@lucasrem If you work on live chassis sets, vacuum tube TV or radios you have to use a 1 to 1 isolation transformer so you can earth the chassis. The same applies to switchmode powersupplies in computers and other equipment. For some fault finding you have to have power on. I don't work on old televisions now, I have a a few old vacuum tube radios to repair but am drawn more to the battery portables which when run from the mains use series string filaments and usually a selenium rectifier or copper oxide stacked rectifier which you replace with a silicon diode and increase the value of dropping resistors as required. measure these with a good quality analogue meter rather than a digital type as they sometimes give false readings especially on resistance ranges. The old AVO 8 was very accurate in this regard, the mark 6 being one of the better types, not so old .
Holy moly. Near on a million views for a tv repairman. This proves two things. People like things to be repairable and appreciate the beauty of the design of some older technology. And of course the admiration for this very capable person.
I mean this as a compliment. You are much more knowledgeable about these old electronics than anyone else I've ever known. This is surprising, because you seem like a young person. Maybe still in high school? Very nice work, regardless of age.
i have no idea what you're talking about, but i love seeing something like this brought back to life. we should never forget this kind of history. i'd love to see this rolled into a classroom of kids and let them know just how far we've come.
Generally speaking, I don´t like too much "electronic videos" because I can take a measurement, read a schematic and in fact, I built my own radio equipment -I´m an "old fashion Ham"...- but when I saw the TV screen and the age -1949..!!!- I couldn´t stop watching your excellent work. Very clear and detailed, even for me..! Many thanks, keep posting these interesting videos, please..!
Amazing that the CRT has held a good vacuum for all of these years.I bought one of these from a neighbor back in early 60s, when upgraded to a 10 inch set. 😀 I should try getting it to run again. From an ex-ham and ex-CRT engineer.
Cândva reparam tv anii 80_90, video recordere ,radio etc unele erau aduse din vest(europa)trebuiau trase in banda pt partea de est.Frumos si bun totodată aceasta prezentare de un adevarat electrotehnist Bravo 👍👍👍👍
I can imagine the day this was brought home to a family, and the kids and parents watching on this. How excited they were. I really enjoy watching your videos!
Awesome video, and well done! I restore vacuum tube scopes, magic eye signal generators and AM radios. I also find the oily paper / wax caps to often be the culprit, but when the chassis are rusty look out for shorted transformers too. I subscribed and look forward to more from you.
Ditto. Slightly unrelated, but do you go mad when people take videos of rescuers and plop sappy music on top? "Oh, this video of an officer saving a child isn't enough - let's add stupid music because people are incapable of emotion otherwise." Sorry, had to vent, but I feel like you'd probably relate.
Maravilloso trabajo, felicitaciones, ¡que hermoso ver un antiguo TV trabajando bien! Comencé mi carrera hace 40 años reparando tv's a válvula. Amazing!
Aclaro; Sin ofender a nadie. Compare usted a un técnico de esta calidad con los nuevos técnicos de Celulares que van "Cortando las Micas" (capacitores smd) hasta encontrar el corto, o los que solo con programadores van reparando TV's de nueva generación sin la más mínima idea del instrumental y de Electrónica, nada que ver!. Yo también comencé a principios de los 80's a estudiar electrónica, vi de válvulas, de transistor y Circuito integrado, por asares del destino y aún siendo mi pasión la electrónica no me dediqué a eso, fui operador de autobuses en México. ahora en mi edad adulta retomé mi pasión y me mantengo estudiando, ha cambiado mucho el oficio, ahora cualquiera con unas pinzas un multímetro barato ya es técnico y van por la calle dañando los aparatos y dejando en mal a nuestro gremio, eso me entristece pues la gente ya no quiere pagar y si lo hacen quieren que les regales tu trabajo, en fin así las cosas, saludos y me da gusto encontrar verdaderos técnicos en canales como este, abrazos desde México.
That's pretty amazing that people in 1949 would have seen a pretty good picture, in spite of what I thought those old TV's might have looked like when new!
not pcbs as such , but transistors(although here in the uk, a transistorised set in the '70s was notorious for burning up!),, pcbs were used with many valve/tube sets , and many got blackened/carbonised due to heat
@@andygozzo72 I was mentioning the PCB because moving and transportation of these old sets could of caused the spider web to collapse on itself and make it just what is needed to produce a fire 🔥🔥🔥🔥
I love these electrostatic sets. Hint: These sets have an RF oscillator to obtain the very high voltage for the CRT, and sometimes the voltage is lower than expected despite everything around it being fine. Sometimes it's the RF coil which got moisture and lowered its Q or even somewhat shorted some spires and that is a coil you definitely don't want to rework. If the voltage drop is not too much, you can seriously raise it by simply inserting a ferrite rod inside the air core. Ferrites from switching power supplies are great for this. And that gives the extra bump the voltage needs without making any serious rework nor modifying anything.
@@lucasrem it is electrostatic. It uses a 7JP4 crt which you can see at 26:40 in the schematics, and at 34:27 you can see that it lacks a yoke. I have 3 of these, 1 Motorola like this one, and 2 Silvertones, I also own a Pilot with 3 inches screen. These "portables" were common in the late 40s. BTW radars which used PPI presentation used magnetic deflection with a servo rotating the yoke, crazy stuff, I own one Decca radar from the 50s. And circling back to my original post, as they are electrostatic they don't have a yoke, hence there is no flyback transformer to take advantage of, hence they used a dedicated tube as an RF power oscillator (usually a 6V6) with air core transformer. I hope that clarifies it 😉
So a tesla coil to power. I wonder why no arcade vector graphics was powered by electro static. X-Y mode on a scope is goes up to 20 MHz. Could draw 3 million lines per second ( turn off the gun a the vertex, fly a loop). 50 thousands lines per frame @ flicker free 60 Hz @@JavierAlbinarrate
I just restored a 1949 teltone 7 inch TV, almost exact circuits as your model, my biggest issue was once i recapped it was the IF was way off. the set just had small screw adjustments in the tuner for fine tuning, took a while to get the sound and video adjusted in the IF stages, i have sweep gens but they to need work, but i was able to finally get a good picture with a strong rf from ma vcr, the over the air boxes dont work so well, Its great keeping this technology alive
Brilliant. Thank you very much. Very nice video. Also very interesting, that just capacitors did not last for such long time. Rest of the set was holding on. Picture on tube is impressive for such old screen development. Nice piece of work of technical development. A lot of inspiration and gratitude to electronic development.
many capacitors do last, ceramic ones very rarely fail, 'modern' poly types almost always last ok, but some been known to drop in capacity with use, especially if subject to high 'current', such as in motor run caps
When I was a kid we had a 1949 Philco TV. It was kept in mint condition. When I was in my late teen years it was given to me, and I kept it maintained. It has been through 2 CRTs. In about the year 2000, I gave it away. The picture quality was very good.
Neat video and am impressed by your skill. Are those old tvs worth rebuilding or you just do it for a hobby. I’m really curious because I’ve got all kinds of interest that no one else but a few will share. I’ve been into electronics my whole life and have always wanted to know how everything works.
Just curious - why don't people use a pair of current limitable DC bench supplies - one for the filament string and one for B+ when testing. That way you can have the filaments running at full temperature then bring the B+ up slowly with a much lower current limit?
From my own experience, the reason people don't do that is because it requires a couple of current limitable DC bench supplies of the proper size. Those aren't cheap or small items for a hobbyist. Also it requires that you disconnect the B+ and heater circuits to use external supplies -- lots of extra work. Most antique TV troubleshooting doesn't require that level of care, particularly if you start off by assuming that all the electrolytics are bad (which for 50+ year old electronics is a near certain situation) and replace them.
@@k8zhd they're big, but not huge. They are switchmode so they may put a bit of noise out, but never had a huge issue with that when working on radios.
Back in the early 80's Dallas down town by the old Heathkit shop had an awesome electronics swap weekend. I just found your channel finding it very inspiring! I have a lot of tube radios to repair as well as automotive grade versions.
Old TV sets are amazing - Reminds me of the old days, when family members would take turns getting up off the couch to change the channel. There was only four channels at the time.
if my mate roger was around hed have loved your channel i remember he rebuilt an early radio the ones before superhete came on the scene the my friend was genius when it came to fixing electronics
I love that people are maintaining these pieces of art that they are, we dont manufacture things like this for general public like they used to and wow does it show
Excellent Troubleshooting! One feels honored to see this.😃 You would have loved the power triode tubes from a 1950s Mass Spectrometer Unit we had sitting in the vaults of the cellar of the Technical University in the 1970s! 😮💨 The troubel was at that time, as Electronics Technician Apprentices, we knew what we had, but were simply too stupid to do something with them, such as building a Pirate Radiostation around those things. 😭
Wow, When you know your job you know your job. I have a 1949 TV set I have been looking to repair for ten years now. It doesn't seem to be getting any closer to Picture! Oh well I could fly easier than what I saw you just do. Very Nice Job!
🥰 электронное отклонение лучей, вместо магнитной системы.... Видео просто супер, смотрел и ностальгия накатила. Electronic deflection of rays, instead of a magnetic system .... The video is just super, I watched and nostalgia rolled over.
I don't believe how incredible that picture looks... On a set that "old"... Brings back memories of trying to get these tube sets working but knowing almost nothing as to the how... Days before the internet
![[LIVE] : ONE ลุมพินี 62 | คู่เอก "มงคลแก้ว vs อีที"](http://i.ytimg.com/vi/q7QuSUtUN94/mqdefault.jpg)
My father served 26 years in the US Navy as an electronics technician. When I was a small child, he built our first TV set, and when he retired in 1965, he owned and operated a TV repair business. He was a wizard at TV repair. Just a test or two and he could pinpoint the problem. I even saw him look at the TV and from the symptoms he saw on the screen he could figure out the problem.
Did you got any inspiration from your father to go in this field ? You should be an electronics engineer , I think 👏👏
LED TVs of this time cannot be repaired.. 95% of their damage is a broken screen, which is priced at the price of the device
It revolutionized the manufacture of screens.. Yesterday I bought a 32-inch TV at a price of 100 dollars... There are computer games with a screen size of 7-10 inches, the price of which does not exceed 45 dollars.. And a used computer for 30-50-100-200 dollars? There is no need to repair the device.. Throw it away and buy a used or a new one?
@@SR-ci6bf This was the early 1950s, there were no LED TVs, it was the old-fashioned black and white CRT picture tube.
@@UdaySingh-cg3rw No I became a Chemist, then eventually a Physics teacher. But I loved electronics and was a Ham radio operator for a long time.
@@wayneyadams 🌹🌹🚩🚩👏👏
What a rat nest. Can really see why printed circuit boards became a thing.
Great video! I appreciate that you care about old tech like this. This is history, and it's worth preserving.
It may have been a rat’s nest, but if the assembler had good soldering skills, it was much more reliable than early printed circuit boards which suffered from thermal cycling that could cause hairline cracks in the traces which were maddeningly difficult to track down and fix. As such hand-wired sets such as Zenith models didn’t fail as often as often and were considered to be better televisions.
Very cool. I worked on a lot of late ‘50s and early ‘60s sets back at one of my first jobs and this really takes me back.
The parts count is so high in a TV that even PCB's are jammed.
@@bunkie2100 'Hard wired' all the way was pretty much the case for the apollo moon shots as well. Sensitive modern day electronics will require a lot of shielding to survive the harsh rigors of a moon mission. The present day Artemis programme should lead to some interesting developments in rugged electronics that can be monitored in real time by a human crew. This will add to the knowledge data base of whats already known by autonomous Moon and Mars probes and rovers.
I'm amazed you were able to get one of those TVs to work! lol, I would've completely noped away from that at first glance.
Thank you!
But that's the challenge, like getting an old rusty engine to run again.
@@jdflyback good job
@@jdflyback Hi! I'm studying electronics. I watched your video and got very interested. Can you send me some pictures of the electrical schematic of this television, so that I can analyze it? If you have the pdf file, can you send it by email?
@@jdflybackI don't think any of our ancestors or the inventors of this TV would have ever expected to play anything modern these days. They must be cheering in their graces for your achievement.
i remember going to an electronics club at the school but the teacher Happy Harry as we used to call him really knew nothing about electronics it was one of the sixth formers that built the projects we called him happy harry cause hed got a permanent smile on his face
Really cool the way you went step by step to see how each failed cap affected the circuit! It was much more insightful and interesting than if you had just blanket-recapped everything.
I was waiting for magic smoke of the ancients...
❤️
I never knew the picture on those could be so clean. I just imagine the picture would occasionally bounce around or have constant noise... to see such an old set working so well is amazing.
I always find it amazing that old electronics perform better than when they were brand-new just because you used modern caps. capacitors back then were really, really trash.
a large part also has to do with the camera recording too. he was using a modern camera to capture the video he was playing. Cameras were not the best but it was the best they had.
Those old sets had pretty good pictures given the limitation of the resolution, which was 525 lines. In addition, most recorded programs were shot on film which explains why TV shows like "Hogan's Heroes" from the early 1960s has such an incredibly high-resolution picture.
@@wayneyadams 480 lines carrying the visible image. :-)
@@nukester. The NTSC standard for analog TV is a frame rate of 30 frames (images) per second, consisting of two interlaced fields per frame at 262.5 lines per field and 60 fields per second.
It's pleasant to watch a kid being into stuff like this instead of just video games and their phone.
Didn't think I would be waking up on a Sunday morning to watch someone repair a vintage TV, but here we are! Nice way to start the day to see how old electronics work.
Your videos are very interesting! Your channel is quite underated, nice to see people still like vacuum tubes...
Many musicians, especially electric guitar players, still prefer tube amplifiers to transistors. Until it was stollen, my stereo system was all tube-type equipment. Couldn't afford to replace it so now I'm stuck with transistor stuff, which just isn't the same.
Vacuum... Tubes.... Huh huh huh huh
Who needs to restore old TV crap ? why you need more people ?
Why you never get hits ? What did you do so far ? Not interesting, who needs skills here ? entertain them with nerdy crap ?
@@audryhaynes3277Да, я так же считаю , что и "место" транзистора - где угодно , только не в звуковоспроизведении. Но ,что поделать, приходится следовать "прогрессу"(принудительному). В то же время понимая,что в ламповых усилителях отсутствуют четвёртые гармоники, а в транзисторных - слышны шестнадцатые.Это я вспоминаю по статье в журнале "Радио".
Mr Carlsons lab too!
As if we are living the 1940s. Thank you for your efforts and for getting back the peaceful old days.
Watching a 2022 digital video into a 1949 analog TV really has it's magic. Great video, thank you.
I bet that TV never thought it would see the day of digital technology, it’s like great grand parents meeting great grand kids.
@@SKYREAPER30 If TVs could cry, this would be the perfect moment xD
Loved the video. Reminds me of a 5" TV I built it 1956 when I was 16 years old. It used a 5BP1 ex radar tube with a green phosphor. It always had issues with poor vertical lock but it was a design problem in the original hobbyist article and I didn't have the skill to improve on it. Many good memories of my early days whilst watching this video.
Making a custom tube is not that hard, getting the Forsfor on it is a bit harder, but we can do that too, only if you can tool the right tools, or can find people who can do that for you !
Upload what you did please !
Electric charge internal deflection plates? I've wondered how well a radar tube would work on 525 lines. Seems like it would be overwhelmed. That is an amazing build for any 16 year old and 1956 quite the bleeding edge.
Went down the same road in 1968 (age 18) with a VCR139A (2 3/4"). I began two years earlier but couldn't make the TRF vision receiver stable at first.
In those days, we still had 405-line TV on 45MHz so, following the line of some of the early UK sets, bearing in mind that pre-war there was only one TV channel, the TRF route was possible.
I still have some of these early electrostatic tubes and with a sprinkling of transistors, might put together something similar but video source would need to be a DVD player or similar.
😎😎😎😎👍
@@directcurrent5751 No reason why ES would not work on 525 or 625 lines come to that. Here in the UK 405-lines was not phased out until 1986 and 625-lines was introduced in 1964. It can be quite a challenge if not near-impossibility to persuade a 405-line LOPT for a magnetically deflected CRT to run at the higher horizontal frequency but no corresponding difficulty converting an electrostatic timebase.
Takes me back to when I was a TV engineer starting in the late 70s till the early 90s before I moved to cable TV and telecoms. It was satisfying to fix tv's back then and on a winters day in the workshop, those old valve tvs could keep you warm 😊
When I was a young engineer at RCA in Camden NJ, about the same time, the heating system in our 1910-era building was about shot, so we turned on the old tube-type Tektronix oscilloscopes to keep the lab on the corner wall habitable in winter. LOTS of tubes in those, plus a fan to move the heat around.
I have a working TV like this here in Brazil. Congratulations on the fix!
a vintage tv repair vid and delicious coffee are an afternoon well spent!
Fantastic! There’s something about the warmth and glow from a crt tube. Very cool to watch Mustie1 on an old TV set.
This video was a delight to watch. This was our first TV. My parents (Dad was W3NVS ham radio operator) bought it from a childhood friend in 1949, who was also a ham radio operator, that owned a TV/Radio repair shop. Ours was the first TV in the neighborhood and we kids would all come to my house to watch Captain Video! At a discount, I think my dad paid something like $130 at the time - a LOT OF MONEY. Later (in 1957) I became W3KYN and am still licensed as K3GW.
Say, do you still have that old TV set? What frequenct do you transmit on, Maybe I could try & tune in!
I never imagined I'd watch a TH-cam video on a 1949 TV set.
this dude can go back 80 years and he can still repair 40s and 30s technology what a god
Завораживает ремонт настолько старых вещей . Не знал что такие ещё можно купить . 😊
I am an electronics tech and started my teenage years first on radio then television in the 1960's . Here in Australia we didn't have series string heaters and direct rectification from the mains to supply HT to the vacuum tubes. A mains power transformer was always used in Australian made sets as at 240V 50 Hz mains the dangers were considerable with potentially live chassis unless an isolation transformer was used. With only 120V @ 60Hz the potential for electrocution of the operator or tech was considerably less. Another comment is that digital multimeters are not as suitable for this type of repair as an older 20,000 ohms per volt analogue instrument. Especially for reading resistor values and capacitor leakage. A digital meter will lead you up the garden path during logical fault finding, only use them when great accuracy is required, in an older set like this, it's basically not ever required . When calculating a capacitor value to use as a ballast resistor use the capacitive reactance equation ie ; XC= 10 to the sixth power over c x freq x 2 pi , where c is in microfarads. Transpose as required.
I was a SGT in the RAAF teaching electronics in my last years in the service.
Robert
RAAF techs in my day were considered good technicians.
Some of the people I ended up teaching sadly would never ever have made top notch techs mainly because they didn't ever have enough interest to apply themselves fully. The same in every field of professional endevour , some actually liked and applied themselves to the profession, some were just along for the ride and it showed.
Fascinating! Thanks for sharing.
Just never power it up when you work on them, not a big risc that is!
Australia is UK/ EU system mixup, you can by local Japanese systems!
You restored models, can you upload videos please !!!
@@lucasrem If you work on live chassis sets, vacuum tube TV or radios you have to use a 1 to 1 isolation transformer so you can earth the chassis. The same applies to switchmode powersupplies in computers and other equipment. For some fault finding you have to have power on. I don't work on old televisions now, I have a a few old vacuum tube radios to repair but am drawn more to the battery portables which when run from the mains use series string filaments and usually a selenium rectifier or copper oxide stacked rectifier which you replace with a silicon diode and increase the value of dropping resistors as required. measure these with a good quality analogue meter rather than a digital type as they sometimes give false readings especially on resistance ranges. The old AVO 8 was very accurate in this regard, the mark 6 being one of the better types, not so old .
Later Motorola discovered the wonders of printed circuit boards.
An intriguing video. Thanks for posting!
Holy moly. Near on a million views for a tv repairman.
This proves two things.
People like things to be repairable and appreciate the beauty of the design of some older technology.
And of course the admiration for this very capable person.
That was very impressive. Your understanding of these ancient machines is amazing.
“I have the CRT cleaned up. I think it looks pretty good.” You are a master of the understatement.
Watching movies on these old TVs has a certain atmosphere to it.
I mean this as a compliment. You are much more knowledgeable about these old electronics than anyone else I've ever known. This is surprising, because you seem like a young person. Maybe still in high school? Very nice work, regardless of age.
i have no idea what you're talking about, but i love seeing something like this brought back to life. we should never forget this kind of history. i'd love to see this rolled into a classroom of kids and let them know just how far we've come.
Generally speaking, I don´t like too much "electronic videos" because I can take a measurement, read a schematic and in fact, I built my own radio equipment -I´m an "old fashion Ham"...- but when I saw the TV screen and the age -1949..!!!- I couldn´t stop watching your excellent work.
Very clear and detailed, even for me..!
Many thanks, keep posting these interesting videos, please..!
The quality is great! That picture seems good enough to watch!
Very nice, an old wise guy once said at some point we're all just going to have to be capacitor janitors in the future 😎
Thank you!
Gorgeous picture, I'm impressed not just by your repair but by how well the set works as designed.
Here's what it would look like watching a TH-cam video in 1949 🙂. Great work!
This brings back fond memories of watching Mustie1 at my grandad's house every Saturday morning. Great set!
Amazing that the CRT has held a good vacuum for all of these years.I bought one of these from a neighbor back in early 60s, when upgraded to a 10 inch set. 😀 I should try getting it to run again.
From an ex-ham and ex-CRT engineer.
@David Wanklyn Surprisingly, I remember a lot. CRT technology has not changed much. Ham radio has. 😀
*THAT PICTURE QUALITY* is utterly amazing for a TV made in 1949...
Cândva reparam tv anii 80_90, video recordere ,radio etc unele erau aduse din vest(europa)trebuiau trase in banda pt partea de est.Frumos si bun totodată aceasta prezentare de un adevarat electrotehnist Bravo 👍👍👍👍
You are amazing.
I love the way you took us though it, step by step. Truly inspiring.
Thank god for people like you.
I can imagine the day this was brought home to a family, and the kids and parents watching on this. How excited they were. I really enjoy watching your videos!
Cool hobby! If you had that TV back in 1949 you were a Baller!
Amazing picture quality & detail for a 73 year old set
Awesome video, and well done!
I restore vacuum tube scopes, magic eye signal generators and AM radios. I also find the oily paper / wax caps to often be the culprit, but when the chassis are rusty look out for shorted transformers too.
I subscribed and look forward to more from you.
I love electrostatic deflection TV's! They always seemed more straightforward to troubleshoot.
this is just blowing my mind, i am so in love of these old stuff
I like that you don't put in annoying background "music". ✊👌
SUPERB!!
Ditto.
Slightly unrelated, but do you go mad when people take videos of rescuers and plop sappy music on top? "Oh, this video of an officer saving a child isn't enough - let's add stupid music because people are incapable of emotion otherwise."
Sorry, had to vent, but I feel like you'd probably relate.
Excellent work, and I'm very surprised how good the image is on that old receiver.
Maravilloso trabajo, felicitaciones, ¡que hermoso ver un antiguo TV trabajando bien!
Comencé mi carrera hace 40 años reparando tv's a válvula.
Amazing!
Aclaro; Sin ofender a nadie.
Compare usted a un técnico de esta calidad con los nuevos técnicos de Celulares que van "Cortando las Micas" (capacitores smd) hasta encontrar el corto, o los que solo con programadores van reparando TV's de nueva generación sin la más mínima idea del instrumental y de Electrónica, nada que ver!.
Yo también comencé a principios de los 80's a estudiar electrónica, vi de válvulas, de transistor y Circuito integrado, por asares del destino y aún siendo mi pasión la electrónica no me dediqué a eso, fui operador de autobuses en México. ahora en mi edad adulta retomé mi pasión y me mantengo estudiando, ha cambiado mucho el oficio, ahora cualquiera con unas pinzas un multímetro barato ya es técnico y van por la calle dañando los aparatos y dejando en mal a nuestro gremio, eso me entristece pues la gente ya no quiere pagar y si lo hacen quieren que les regales tu trabajo, en fin así las cosas, saludos y me da gusto encontrar verdaderos técnicos en canales como este, abrazos desde México.
That's pretty amazing that people in 1949 would have seen a pretty good picture, in spite of what I thought those old TV's might have looked like when new!
The interesting thing was that almost all daily TV programs was either performed live or was on film (since videotape didn't exist yet!)
Incredible... You're a thoughtful, skilled technician to be sure. Thanks for the post.
when you pulled up the schematic. it brought back memories why i got an F in electronics class.
The old ones were certainly a fire trap, I was so surprised with the quality of the picture on the set, so cool, PCBs certainly changed everything.
not pcbs as such , but transistors(although here in the uk, a transistorised set in the '70s was notorious for burning up!),, pcbs were used with many valve/tube sets , and many got blackened/carbonised due to heat
@@andygozzo72 I was mentioning the PCB because moving and transportation of these old sets could of caused the spider web to collapse on itself and make it just what is needed to produce a fire
🔥🔥🔥🔥
I love these electrostatic sets. Hint: These sets have an RF oscillator to obtain the very high voltage for the CRT, and sometimes the voltage is lower than expected despite everything around it being fine. Sometimes it's the RF coil which got moisture and lowered its Q or even somewhat shorted some spires and that is a coil you definitely don't want to rework. If the voltage drop is not too much, you can seriously raise it by simply inserting a ferrite rod inside the air core. Ferrites from switching power supplies are great for this. And that gives the extra bump the voltage needs without making any serious rework nor modifying anything.
Javir Albinarrate
This TV is magnetic deflection
Radar is oscilloscope CRTs, electrostatic deflection!
@@lucasrem it is electrostatic. It uses a 7JP4 crt which you can see at 26:40 in the schematics, and at 34:27 you can see that it lacks a yoke. I have 3 of these, 1 Motorola like this one, and 2 Silvertones, I also own a Pilot with 3 inches screen. These "portables" were common in the late 40s.
BTW radars which used PPI presentation used magnetic deflection with a servo rotating the yoke, crazy stuff, I own one Decca radar from the 50s.
And circling back to my original post, as they are electrostatic they don't have a yoke, hence there is no flyback transformer to take advantage of, hence they used a dedicated tube as an RF power oscillator (usually a 6V6) with air core transformer.
I hope that clarifies it 😉
@@lucasrem Magnetic deflection????????????? Have you actually watched the video?
So a tesla coil to power. I wonder why no arcade vector graphics was powered by electro static. X-Y mode on a scope is goes up to 20 MHz. Could draw 3 million lines per second ( turn off the gun a the vertex, fly a loop). 50 thousands lines per frame @ flicker free 60 Hz @@JavierAlbinarrate
I just restored a 1949 teltone 7 inch TV, almost exact circuits as your model, my biggest issue was once i recapped it was the IF was way off. the set just had small screw adjustments in the tuner for fine tuning, took a while to get the sound and video adjusted in the IF stages, i have sweep gens but they to need work, but i was able to finally get a good picture with a strong rf from ma vcr, the over the air boxes dont work so well, Its great keeping this technology alive
That's amazing that you're able to restore those that's a lost art 🎨.
Brilliant. Thank you very much. Very nice video. Also very interesting, that just capacitors did not last for such long time. Rest of the set was holding on. Picture on tube is impressive for such old screen development. Nice piece of work of technical development. A lot of inspiration and gratitude to electronic development.
many capacitors do last, ceramic ones very rarely fail, 'modern' poly types almost always last ok, but some been known to drop in capacity with use, especially if subject to high 'current', such as in motor run caps
Awesome work!
Thank you!
I enjoy watching a old TV 📺 it's a great feeling 😊
When I was a kid we had a 1949 Philco TV. It was kept in mint condition. When I was in my late teen years it was given to me, and I kept it maintained. It has been through 2 CRTs. In about the year 2000, I gave it away. The picture quality was very good.
Neat video and am impressed by your skill. Are those old tvs worth rebuilding or you just do it for a hobby. I’m really curious because I’ve got all kinds of interest that no one else but a few will share. I’ve been into electronics my whole life and have always wanted to know how everything works.
Just curious - why don't people use a pair of current limitable DC bench supplies - one for the filament string and one for B+ when testing. That way you can have the filaments running at full temperature then bring the B+ up slowly with a much lower current limit?
From my own experience, the reason people don't do that is because it requires a couple of current limitable DC bench supplies of the proper size. Those aren't cheap or small items for a hobbyist. Also it requires that you disconnect the B+ and heater circuits to use external supplies -- lots of extra work. Most antique TV troubleshooting doesn't require that level of care, particularly if you start off by assuming that all the electrolytics are bad (which for 50+ year old electronics is a near certain situation) and replace them.
@@k8zhd I guess I've been lucky on eBay - I have a pair of 300v / 3A supplies that didn't cost the earth!
@@martinwhitaker5096 Wow! 900 Watt supplies -- they must be huge!
@@k8zhd they're big, but not huge. They are switchmode so they may put a bit of noise out, but never had a huge issue with that when working on radios.
the "extreme" idea of restoration of the tail component of the TV is still the tube as well as the screen. you are great👍
Excellent! Love the way you are doing this. Reminds me of stuff I used to do about sixty years ago!
In your lab, i don't know why your laptop also looks like vintage one.. 😁
Back in the early 80's Dallas down town by the old Heathkit shop had an awesome electronics swap weekend.
I just found your channel finding it very inspiring! I have a lot of tube radios to repair as well as automotive grade versions.
Old TV sets are amazing - Reminds me of the old days, when family members would take turns getting up off the couch to change the channel. There was only four channels at the time.
I have this same set. It's one of the first ones I learned to work on in the 1970s. It's nice to see an early tv working g
if my mate roger was around hed have loved your channel i remember he rebuilt an early radio the ones before superhete came on the scene the my friend was genius when it came to fixing electronics
One of the most fascinating videos I've seen in TH-cam !
This is amazing!! And seeing a TH-cam video in that vintage CRT is absolutely mind blowing. Bravo!!!
I love what you do with those antique tvs. Nice job!
👍 very interesting and takes me back to my youth 😱🏴
This is unbelievably cool, thank you for showing your process!
Great job! I was 3-years-old when these were manufactured! 🤣
I love that people are maintaining these pieces of art that they are, we dont manufacture things like this for general public like they used to and wow does it show
Thank you for this amazing video. As a tech geek and child of 1981, I greatly appreciate this footage more than I can express in this comment.
Brilliant, it gives you the feeling of viewing the past through a time machine.
Amazing thing about TV's of that era, they were no more than a large screen O'scope. Great video.
wow 👀 That was a great work and nice piece of history too 👏
Great restoration! Resolution is surprisingly good for the small size and age of the tube.
Excellent Troubleshooting! One feels honored to see this.😃
You would have loved the power triode tubes from a 1950s Mass Spectrometer Unit we had sitting in the vaults of the cellar of the Technical University in the 1970s! 😮💨
The troubel was at that time, as Electronics Technician Apprentices, we knew what we had,
but were simply too stupid to do something with them, such as building a Pirate Radiostation around those things. 😭
So nice to see it working, and working well! It would be great to have the case refurbrished as well.
Fantastic job! You have a lot of patience. Keep up the excellent job. 👍👍
Very well done, nice to see you got it working and thanks for sharing.
Watching and listening to the set at the very end came across as a very real experience. It looked and sounded like an old TV, (which it is). 👍🏼
Wow, When you know your job you know your job. I have a 1949 TV set I have been looking to repair for ten years now. It doesn't seem to be getting any closer to Picture! Oh well I could fly easier than what I saw you just do. Very Nice Job!
Another person who appreciates where our technology has come from. Kudos to you!!!
I wish i had held on to all the TV repair manuals and spec sheets from the 60s, 70s and 80s that my father had.
Awesome stuff!
So glad I found your channel. Thanks for the incredible content!
Wrapping up by piping in TH-cam into that set really made me smile
🥰 электронное отклонение лучей, вместо магнитной системы.... Видео просто супер, смотрел и ностальгия накатила. Electronic deflection of rays, instead of a magnetic system .... The video is just super, I watched and nostalgia rolled over.
I'm so excited to see this! I have two of these sets I'm planning to attempt to rehab. I'll defintitely refer to this when I do!
I don't believe how incredible that picture looks... On a set that "old"... Brings back memories of trying to get these tube sets working but knowing almost nothing as to the how... Days before the internet
Never thought I’d see Mustie1 on a black and white tv from the 40’s!
One of the TVs my school still using when showing us films in class
Mustie1, Awesome! love his Sunday videos. This repair also good stuff, thanks for sharing.
That's amazing! Got a keep the old crafts up just in case we need to make more in the future!
Round CRT. I was so happy far as repairs go when the tube set stop being made. Good luck with the repair.
Another great video... And A Mustie 1 viewer apparently. Love his channel too. Fixing things that others consider junk..
Love it...
I clicked because I thought it was a Fallout TV Build. I Stayed because the content was amazing.
thats amazing the clarity of that picture